第十一届中美华人纳米论坛程序册 the 11Th Sino-US Nano Forum

第十一届中美华人纳米论坛程序册 The 11th Sino-US Nano Forum

会议地点：南京大学仙林校区恩玲剧场

6 月 18 日 7:50-8:00 开幕式刘忠范主题： 8:00-8:40 2-D nanocarbons: attraction, reality and future 北京大学 2D 材料 Wang Feng Probing Dirac electron physics in graphitic 8:40-9:00 UC, Berkeley materials 主持人王欣然 Exploring organic semiconductors at the 刘杰 9:00-9:20 南京大学 two-dimensional limit 胡征 Yuan Hongtao Electric control of spin-coupled valleytronics 9:20-9:40 Stanford Univ. in layered metal dichalcogenides 9:40-10:00 茶歇黄晓 Gas sensors based on nanomaterials in 10:00-10:20 南京工业大学 non-invasive diagnosis 彭海琳 New two-dimensional crystals: controlled 10:20-10:40 北京大学 synthesis and optoelectronic devices

陈伟 Interface engineering for 2D phosphorene 主持人 10:40-11:00 石高全 NUS, Singapore based optoelectronic devices Low dimensional inorganic solids: regulation 李丹吴长征 11:00-11:20 of electric behavior and their energy 中科大 applications 王训 Self-assembly of sub-1nm ultrathin 11:20-11:40 清华大学 nanostructures 主持人：刘忠范 Panel 11:40-12:30 刘杰，段镶锋，郭万林，魏飞，Wang Feng，张华，李丹，张锦， discussion 瞿研… 12:14-14:00 午休包信和主题： Nano-catalysis and new horizon of C 14:00-14:40 复旦大学，大连化 1 纳米催化 chemistry 物所

吴屹影 Molecular analogs of MoS edges for superior 14:40-15:00 2 Iowa State Univ. hydrogen-evolution electrocatalysis 主持人 N-doped hierarchical porous carbon supported 苏党生王勇 15:00-15:20 metal nanoparticles as an efficient catalyst for 浙江大学刘斌 selective hydrogenation of aromatics 彭路明 Distinguishing faceted oxide nanocrystals with 15:20-15:40 17 南京大学 O solid-state NMR spectroscopy 15:40-16:00 茶歇

Low temperature aqueous-phase 马丁 16:00-16:20 Fischer-Tropsch synthesis reaction over Ru 北京大学 catalyst with ultra-high density of active sites 孙玉刚 Multiple functions of Pt nanocrystals in 16:20-16:40 主持人 Temple Univ. photocatalysis 丁维平傅强 Metal-catalyzed reactions under 2D layered 16:40-17:00 侯仰龙大连化物所 material covers 路军岭 Atomic layer deposition for advanced catalyst 17:00-17:20 中科大 “bottom-up” synthesis 陆晨光 Interfacial control of self-assembled 17:20-17:40 国家纳米中心 nanoparticles and their applications 主持人：包信和 Panel 17:40-18:30 杨培东，李亚栋，崔屹，邹志刚，Chia-Kuang (Frank) Tsung，苏 discussion 党生，丁维平，郑南峰，吴屹影，孙玉刚

19:00-21:30 墙报

6 月 19 日

主题：聂书明 Nanotechnology and precision medicine: new 8:00-8:40 Emory Univ. frontiers in molecular diagnostics, targeted 纳米生物南京大学 therapy, and image-guided surgery 医学顾臻 Leveraging physiology for precision drug 8:40-9:00 UNC Chapel Hill / delivery NC State Univ. 王树涛 Engineering biointerface with controlled cell 主持人 9:00-9:20 中科院理化所 adhesion towards cancer diagnostics 戴宏杰刘庄刘珏文 9:20-9:40 Univ. Waterloo, Lipid hybrid nanomaterials for drug delivery Canada 9:40-10:00 茶歇郑杰 Renal clearable nanoprobes for biomedical 10:00-10:20 UT, Dallas imaging Protein activity regulation: inhibition by 袁荃 10:20-10:40 closed-loop aptamer-based structures and 武汉大学主持人 restoration by near-IR stimulation 庞代文韩纲 Small and bright: illuminating life with 10:40-11:00 王强斌 Univ. of Mass. functional luminescent nanoparticles

何彦 Single molecule spectroscopy of plasmonic 11:00-11:20 清华大学 metal nanoparticles in living cells 王伟 Measuring binding kinetics of bio-conjugated 11:20-11:40 南京大学 nanomaterials with intact cells 主持人：聂书明 Panel 11:40-12:30 戴宏杰，江雷，彭笑刚，俞书宏，庞代文，鞠熀先，顾宁，李景 discussion 虹，刘宝瑞，赵宇亮

12:30-14:00 午休

鲍哲楠主题： 14:00-14:40 Skin-inspired electronic materials and devices Stanford Univ. 纳米能源朱嘉 Tailoring nanostructures for solar energy 14:40-15:00 南京大学 conversions 主持人 Designing two-dimensional materials and 姚彦 15:00-15:20 conjugated redox polymers for safe and 徐东升 Univ. of Houston 王丹 low-cost energy storage Solution-processed oxide films as 金一政 15:20-15:40 charge-transporting interlayers for 浙江大学 optoelectronics 15:40-16:00 茶歇 Piezotronics enhancement in solar energy 王旭东 16:00-16:20 harvesting and electrochemical catalytic UW-Madison systems 牛志强 Advanced unconventional supercapacitors 16:20-16:40 南开大学 based on nanocarbon materials 主持人胡良兵赵惠军 16:40-17:00 Nanostructures for beyond li-ion batteries 麦立强 Univ. of Maryland Rational design of carbon/inorganic 金钟 17:00-17:20 nanostructures for efficient energy conversion 南京大学 and storage 曾海波 Antimonene (2D Sb): theoretical prediction, 17:20-17:40 南京理工大学 synthesis, properties 主持人：鲍哲楠 Panel 17:40-18:30 杨培东，刘杰，赵东元，崔屹，金松，戴黎明，陈军，黄云辉， discussion 周豪慎，乔世璋，孙守恒

19:00-21:30 墙报

清华大学出版社-施普林格纳米研究奖论坛 Nano Research Award Symposium 会议地点：南京大学仙林校区恩玲剧场

6 月 20 日

主持人赵东元 8:00-8:10 清华大学出版社-施普林格纳米研究奖颁奖仪式

戴宏杰杨培东 8:10-9:00 CO2 + H2O + Sunlight  Chemical Fuels + O2 颁奖 UC, Berkeley 李亚栋 A stable single Co atoms/N-doped porous 9:00-9:30 主持人清华大学 carbon superior ORR catalyst 戴宏杰崔屹 9:30-10:00 Tuning of catalysts Stanford Univ 10:00-10:20 茶歇 Smart interfacial materials from 江雷 10:20-10:50 super-wettability to binary cooperative 中科院化学所 complementary systems Frank Tsung Controlled encapsulation of catalysts into 10:50-11:20 主持人 Boston College metal-organic frameworks 彭笑刚赵东元 11:20-11:50 Surface and ligand chemistry of quantum dots 浙江大学戴黎明 Functional energy materials: from 1D and 2D 11:50-12:20 Case Western polymers to 3D carbon nanomaterials Reserve Univ. 12:20-14:00 午休 Surface coordination chemistry of 郑南峰 14:00-14:30 nanomaterials 厦门大学

孙守恒 Tuning nanoparticle catalysis for efficient 14:30-15:00 electrochemical reactions 主持人 Brown Univ. 陈立桅 Functional scanning probe microscopy in 金松 15:00-15:30 苏州纳米所 operando energy nanodevices 黄嘉兴 Data processing algorithms: an unexpected 15:30-16:00 Northwestern tool for designing nanopatterns Univ. 16:00-16:20 茶歇张华 Crystal phase-controlled synthesis of novel 16:20-16:50 NTU, noble metal nanomaterials Singapore 主持人段镶锋 16:50-17:20 2D Electronics: opportunities and challenges 俞书宏 UCLA Carbon-based nanostructures for energy 胡征 17:20-17:50 conversion and storage: synthesis, 南京大学 performance and mechanism 17:50-18:10 闭幕式：优秀墙报颁奖… 18:30-20:30 邀请嘉宾晚宴（Nano Res赞助）。庆祝活动。

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

主题报告

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

2-D Nanocarbons: Attraction, Reality and Future

Zhongfan Liu

Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China; [email protected]

Carbon element has a great number of allotropes, covering the traditional three dimensional (3-D) diamond and graphite, 2-D graphene, 1-D carbon nanotubes and 0-D fullerenes. Recently, graphyne, a new 2-D carbon allotrope family formed by sp and sp2 hybridization carbon atoms also comes into the stage. Theoretical calculations further indicate that there may exist a penta-graphene, formed by a huge number of carbon pentagons in a 2-D fashion instead of the hexagon structure of graphene. Therefore, 2-D nanocarbons including graphene, graphyne, etc have created a new category of carbon allotropes which attract increasing attentions. We have been working on the controlled synthesis of 2-D nanocarbons for many years. Systematic studies have been done on the chemical vapor deposition (CVD) of high quality graphene on various solid substrates ranging from metals (Cu, Ni, Cu-Ni alloy, Pt, Ru, Rh, Ir, Pd), groups IV-VI early transition metal carbides, to dielectric substrates (h-BN, STO, glass, NaCl). We also made a great effort for the controlled synthesis of graphdiyne, a representative member of the graphyne family. A brief overview will be made by focusing on the growth issue, which will determine the future of both graphene and graphynes.

1. JB Yin, H Wang, H Peng, ZJ Tan, L Liao, L Lin, X Sun, AL Koh, YL Chen, HL Peng*, ZF Liu*, Selectively enhanced photocurrent generation in twisted bilayer graphene with van hove singularity, Nature Commun., 2016, 7, 10699. 2. T Gao, XJ Song, HW Du, YF Nie, YB Chen, QQ Ji, JY Sun, YL Yang, YF Zhang*, ZF Liu*, Temperature-triggered chemical switching growth of in-plane and vertically stacked graphene-boron nitride heterostructures, Nature Commun., 2015, 6, 6835. 3. YB Chen, JY Sun, JF Gao, F Du, Q Han, YF Nie, ZL Chen, A Bachmatiuk, M Kr. Priydarshi, DL Ma, XJ Song, XS Wu, CY Xiong, MH Rümmeli, F Ding, YF Zhang* & ZF Liu*, Growing uniform graphene disks and films on molten glass for heating devices and cell culture，Adv. Mater. 2015, 27, 7839. 4. BY Dai, L Fu, ZY Zou, M Wang, HT Xu, S Wang, ZF Liu*, Rational design of a binary metal alloy for chemical vapor deposition growth of uniform single-layer graphene, Nature Commun. 2011, 2, 522. 5. K Yan, L Fu, HL Peng, ZF Liu*, Designed CVD Growth of Graphene via Process Engineering, Acc. Chem. Res. 2013, 46, 2263. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Prof. Zhongfan Liu graduated from Changchun Institute of Technology in 1983 and received his PhD from University of Tokyo in 1990. After a postdoctoral experience at Institute for Molecular Science, Japan, he became an associate professor (1993), full professor (1993) and Cheung Kong Chair professor (1999) of Peking University. He was elected as the member of Chinese Academy of Sciences in 2011 and as one of the six outstanding scientists in Ten-Thousand-Talents Program in 2013.

Prof. Liu’s research interest focusses on low dimensional carbon materials and novel 2D atomic crystals targeting nanoelectronic and energy conversion devices together with the exploration of fundamental phenomena in nanoscale systems. He has published over 450 peer reviewed articles and 26 Chinese patents. The academic awards he received include, Outstanding Young Scientist Award of Hong Kong Qiushi Foundation (1997), MOE Science and technology Award (1st class, 2007), National Natural Science Award (2nd class, 2008), Chinese Chemical Society-AkzoNobel Chemical Science Award (2012), Baogang Outstanding Teacher Award (2012), and etc.

He is now the directors of Center for Nanoscale Science and Technology, Center for Nanochemistry, and Beijing Science and Engineering Center for Nanocarbons. He is the chairman of nanochemistry committee in Chinese Chemical Society. He also serves as advisory/editorial board member of Adv. Mater., Small, Nano Res, ChemNanoMat, Natural Science Review, Graphene Technology and NPG Asia Mater, and Editor-in-Chief of ACTA PHYSICO-CHIMICA SINICA and the associate editor of APL Materials, Chinese Science Bullentin, Acta Chimica Sinica. Prof. Liu is the Fellow of the Institute of Physics (UK, 2004), the Fellow of Royal Society of Chemistry (UK, 2014) and the Fellow of TWAS (The World Academy of Sciences for the advancement of science in developing countries, 2015).

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Nano-Catalysis and New Horizon of C1 Chemistry Xinhe BAO Dalian Institute of Chem. Phys (DICP), the Chinese Academy of Sciences (CAS) Fudan University, Shanghai/China

Methane, the main component of natural gas, is the most stable yet abundant organic molecule in nature. Its selective activation and conversion is a worldwide challenge and often considered as the "Holy Grail" in chemistry. With the worldwide exploration of methane-rich shale gas, natural gas hydrates, as well as biogases, the production of basic chemicals using relatively cheap and abundant natural gas resources has become a focus in academic and industrial research. We have developed the concept of "nano-confinement in catalysis", and creatively constructed single-site iron silicide catalyst based on that concept. The lattice-confined iron silicide catalyst enables the direct and nonoxidative conversion of methane, exclusively to high value basic chemicals, such as ethylene, aromatics and hydrogen[1]. In collaboration with Shanghai Synchrotron Radiation Source, we have identified the structure of active sites to be low valent iron center, bonded with two neighboring carbon atoms and one silicon atom and embedded in the matrix of silicon oxide or silicon carbide lattice, which renders the active iron sites to be stable at high temperatures. Catalytic dehydrogenation of methane at the coordinatively unsaturated iron center forms active methyl radicals, which desorb rapidly desorbed from the catalyst surface and form ethylene and aromatic molecules through gas-phase coupling reactions. In additional, I will also talk about the new catalytic process OX-ZEO of directly converting syngas to light olefins with a selectivity far beyond the limit of Anderson-Schultz-Flory distribution of Fischer-Tropsch-synthesis, which was presented recently[2].

Fig. 1: Direct conversion of methane over SiO2 lattice confined single Fe site(A); Selectively conversion of syngas over Ox-Zeo composite catalysis References: 1. Xiaoguang Guo, Guangzong Fang, Gang Li, Hao Ma, Hongjun Fan, Liang Yu, Chao Ma, Xing Wu, Dehui Deng, Mingming Wei, Dali Tan, Rui Si, Shuo Zhang, Jianqi Li, Litao Sun, Zichao Tang, Xiulian Pan, Xinhe Bao*, Science, 2014, 344, 616-619 2. Feng Jiao, Jinjing Li, Xiulian Pan*, Jianping Xiao, Haobo Li, Hao Ma, Mingming Wei, Yang Pan, Zhongyue Zhou, Mingrun Li, Shu Miao, Jian Li, Yifeng Zhu, Dong Xiao, Ting He, Junhao Yang, Fei Qi, Qiang Fu, Xinhe Bao*, Science, 2016, 351,1065-1068 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Bao’s Biography BAO Xinhe received his PhD in Physical Chemistry from Fudan University in 1987 and then worked as a Fellow of Alexander von Humboldt in Frize-Haber institute of Max-Planck Society in Berlin/Germany. He became a full Professor of the Dalian Institute of Chemical Physics (DICP, CAS) in China in 1995 and group leader of Nano & Interface Catalysis at the State Key Laboratory of Catalysis later. He held the positions of the institute director from 2000 to 2007 and was appointed the Executive Vice President of Fudan University in 2015. Bao is the member of Chinese Academy of Sciences, the member of the Academy of Sciences for the Developing World (TWAS) and the fellow of the Royal Society of Chemistry (UK). He is currently the vice President of Chemistry Society of China and the President of Chinese Society of Catalysis. Bao is Editor-in-chief of Journal of Energy Chemistry (JEC, Elsevier), and his name is listed in the editorial board or international advisory borad of several international scientific journals, including Angew. Chem. Int. Ed., Energy & Env. Sci., Chem. Sci., Surf. Sci. Report, ChemCatChem, ChemPhysChem, Surf. Sci. and etc. His research focuses mainly on the fundamental understanding of catalysis, and its application to the development of new catalyst and catalytic process related to energy conversion, in particular clean coal and natural gas utilization. His achievements in catalysis of nanoporous materials, nano-structured carbon materials and nano-sized oxide particles, as well as in fundamental understanding of nano-confined catalysis have been well recognized worldwide. BAO has published more than 500 scientific papers and 1 book (Elsevier) with a citation over 14000 times, and filed 120 patents.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Nanotechnology and Precision Medicine: New Frontiers in Molecular Diagnostics, Targeted Therapy, and Image-Guided Surgery

聂书明

College of Engineering and Applied Sciences, Nanjing University, Nanjing, China, and Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA 30322, USA. Email: [email protected] and [email protected]

Abstract. Nanotechnology is an area of considerable current interest in biomedical engineering because of its broad applications in biomedical imaging, in-vitro diagnostics, and targeted therapy. The basic rationale is that nanometer-sized particles such as quantum dots, colloidal gold, and polymeric nanomicelles have functional and structural properties that are not available from either discrete molecules or bulk materials. When conjugated with targeting ligands such as monoclonal antibodies, peptides or small molecules, these nanoparticles can be used to target malignant tumor cells and the tumor microenvironment (such as tumor stroma and tumor vasculatures) with high specificity and affinity. In the “mesoscopic” size range of 10-100 nm, nanoparticles also have large surface areas for conjugating to multiple diagnostic and therapeutic agents, opening new possibilities in imaging, therapy, and surgery. At the present, however, there are several fundamental problems and technical barriers that must be understood and overcome. In this talk, I will discuss the major challenges and opportunities in the development of nanomedicine for intraoperative cancer detection, molecular diagnostics, and image-guided surgery. This work was supported by grants from the US National Institutes of Health (U54 CA119338, RC2 CA148265, and R01CA163256).

Biography: Dr. Shuming Nie is the Wallace H. Coulter Distinguished Chair Professor in Biomedical Engineering at Emory University and the Georgia Institute of Technology, Director of the Emory-Georgia Tech Cancer Nanotechnology Program, and Founding Dean of the College of Engineering and Applied Sciences of Nanjing University (China). His academic research is in the areas of molecular engineering and nanotechnology, with a focus on bioconjugated nanoparticles for cancer molecular imaging, molecular profiling, and targeted therapy. His major academic achievements include the discovery of colloidal metal nanoparticles that are able to amplify the efficiencies of surface-enhanced Raman scattering (SERS) by 14-15 orders of magnitude, his pioneering work on water-soluble semiconductor quantum dots for biomedical applications, and his breakthrough work in developing multifunctional smart nanoparticles for integrated biomedical imaging and therapy, including image-guided cancer surgery. Professor Nie has published over 300 papers, patents, and book chapters, have delivered more than 400 invited lectures around the world, and have trained over 30 doctoral students and postdoctoral fellows who are now making an impact at top academic institutions and biotech companies. His scholarly work has been cited over 50,000 times with an h-index of 80 (Google Scholar). Professor Nie received his BS degree from Nankai University (Tianjin, China) in 1983, earned his MS and PhD degrees from Northwestern University (Evanston, Illinois, 1984-1990), and did postdoctoral research at the Georgia Institute of Technology and Stanford University (1990-1994). 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Skin-Inspired Electronic Materials and Devices

Zhenan Bao 1,* 1 Stanford University * Corresponding author: [email protected]

Skin is the body’s largest organ, and is responsible for the transduction of a vast amount of information. This conformable, stretchable and biodegradable material simultaneously collects signals from external stimuli that translate into information such as pressure, pain, and temperature. The development of electronic materials, inspired by the complexity of this organ is a tremendous, unrealized materials challenge. However, the advent of organic-based electronic materials may offer a potential solution to this longstanding problem. In this talk, I will describe the design of organic and nano electronic materials to mimic skin functions. These new materials enabled unprecedented performance or functions in medical devices, energy storage and environmental applications.

Biography Zhenan Bao is a Professor of Chemical Engineering at Stanford University, and by courtesy a Professor of Chemistry and Professor of Material Science and Engineering. Prior to joining Stanford in 2004, she was a Distinguished Member of Technical Staff in Bell Labs, Lucent Technologies from 1995-2004. She has over 400 refereed publications and over 60 US patents with a Google Scholar H-Index of >110. Bao is a member of the National Academy of Engineering. Bao served as a Board Member for the National Academy Board on Chemical Sciences and Technology and Board of Directors for the Materials Research Society (MRS). She is an Associate Editor for Chemical Sciences. She serves/served on the international advisory board for Nature Asia Materials, Journal of American Chemical Society, Advanced Materials, Advanced Functional Materials, Advanced Energy Materials, Advanced Electronic Materials, ACS Nano, Chemistry of Materials, Nanoscale, Chemical Communication, Macromolecules, Organic Electronics, Materials Horizon and Materials Today. Bao is a Fellow of ACS, AAAS, MRS, SPIE, ACS PMSE and ACS POLY. Bao was the recipient of the AICHE Andreas Acroivos Award for Professional Progress in Chemical Engineering 2014, ACS Polymer Division Carl S. Marvel Creative Polymer Chemistry Award 2013, ACS Author Cope Scholar Award 2011, Royal Society of Chemistry Beilby Medal and Prize 2009, IUPAC Creativity in Applied Polymer Science Prize 2008, American Chemical Society Team Innovation Award 2001, R&D 100 Award 2001. Bao was selected by MIT Technology Review magazine in 2003 as one of the top 100 young innovators. She is among the world’s top 100 materials scientists by Thomson Reuters. She was selected by Nature Magazine as Nature’s 10 People who mattered in 2015 for her work in electronic skin. She is a co-founder and on the Board of Directors for C3 Nano, a silicon-valley venture funded start-up commercializing flexible transparent electrodes using nanomaterials.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

纳米研究奖论坛报告

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

CO2 + H2O + Sunlight  chemical Fuels + O2

Peidong Yang

Department of Chemistry and Department of Materials Science Engineering, University of California, Berkeley 94720; Materials Science Division, Lawrence Berkeley National Lab, Berkeley CA 94720

Solar‐to‐chemical (STC) production using a fully integrated system is an attractive goal, but to‐date there has yet to be a system that can demonstrate the required efficiency, durability, or be manufactured at a reasonable cost. One can learn a great deal from the natural photosynthesis where the conversion of carbon dioxide and water to carbohydrates is routinely carried out at a highly coordinated system level. There are several key features worth mentioning in these systems: spatial and directional arrangement of the light‐harvesting components, charge separation and transport, as well as the desired chemical conversion at catalytic sites in compartmentalized spaces. In order to design an efficient artificial photosynthetic materials system, at the level of the individual components: better catalysts need to be developed, new light‐ absorbing semiconductor materials will need to be discovered, architectures will need to be designed for effective capture and conversion of sunlight, and more importantly, processes need to be developed for the efficient coupling and integration of the components into a complete artificial photosynthetic system. In this talk I will discuss our latest efforts in this direction.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Peidong Yang received a B.S. in chemistry from University of Science and Technology of China in 1993 and a Ph.D. in chemistry from Harvard University in 1997. He did postdoctoral research at University of California, Santa Barbara before joining the faculty in the department of Chemistry at the University of California, Berkeley in 1999. He is currently professor in the Department of Chemistry, Materials Science and Engineering; and a senior faculty scientist at the Lawrence Berkeley National Laboratory. He is S. K. and Angela Chan Distinguished Chair Professor in Energy. He was elected as MRS Fellow, and a member of National Academy of sciences, American Academy of Arts and Sciences. He is a Honorary Fellow of Chinese Chemical Society, a Fellow of Royal Society of Chemistry (FRSC), and a senior fellow for Canadian Institute for Advanced Research.

He is the director for California Research Alliance by BASF, and co‐director for the Kavli Energy Nanoscience Institute. He is one of the founding members for DOE Energy Innovation Hub: Joint Center for Artificial Photosysnthesis (JCAP) and served as its north director for the first two years. Yang is an associate editor for Journal of the American Chemical Society and also serves on editorial advisory board for number of journals including Acct. Chem. Res. and Nano. Lett. He was the founder of the Nanoscience subdivision within American Chemical Society. He has co‐founded two startups Nanosys Inc. and Alphabet Energy Inc. He is the recipient of MacArthur Fellowship,E. O. Lawrence Award, ACS Nanoscience Award, MRS Medal, Baekeland Medal, Alfred P. Sloan research fellowship, the Arnold and Mabel Beckman Young Investigator Award, National Science Foundation Young Investigator Award, MRS Young Investigator Award, Julius Springer Prize for Applied Physics, ACS Pure Chemistry Award, and Alan T. Waterman Award. According to ISI (Thomas Reuters), Yang is ranked as No. 1 in materials science and No. 10 in chemistry for the past 10 years based on average citation per paper, and he has an h‐index of 121. He is 2014 Thomas Reuters Citation Laureate in Physics. His main research interest is in the area of one dimensional semiconductor nanostructures and their applications in nanophotonics and energy conversion.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

A Stable Single Co Atoms/N-doped Porous Carbon Superior ORR Catalyst

Yadong Li* Department of Chemistry, Tsinghua University, Beijing 100084 * Corresponding author: [email protected]

Developing new synthetic methods to single atoms and cluster is a significant challenge in material science. Here we report a new strategy to achieve stable Co single atoms/nitrogen-doped porous carbon with high metal concentration over 4%. This strategy is based on a pyrolysis process of designed bimetallic Zn/Co strategy, which Co can be reduced in N-doped Porous Carbon and Zn will be selectively evaporated away at high temperature above 900 oC. The spherical aberration correction electron microscopy and extended x-ray absorption fine structure measurements both confirm the atomic dispersion of Co atoms stabilized by N-doped porous carbon. This synthetic strategy can be readily applied to other metal single atoms such as Ni, Pt and Ru etc. Surprisingly, the obtained Co single sites exhibit superior ORR performance with half-wave potential (0.877 V), which is more positive than commercial Pt/C (0.812 V) and most reported non-precious metal catalysts. Durability test revealed the Co single atoms exhibit outstanding chemical stability during the electrocatalysis and thermal stability at 900 oC. Our findings open up a new routine for general and practical synthesis of a variety of single atoms material, which shed light to new discovery in condensed materials at atomic scale.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Tuning of Catalysts

Yi Cui Department of Materials Science and Engineering, Stanford University. Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory. Email: [email protected]

Low cost and highly efficient catalysts are critical for chemical synthesis, fuel generation and fuel cells. The most common way to search for efficient electrocatalysts is through new chemical composition and morphology. Here I will present our research in the past five years on improve the catalytic activity through novel means including tuning the electrochemical potential, oxidation state, morphology and strain, resulting in the discovery of some of the most active catalysts. I also presented a new type of straining tuning methodology to control the catalytic activity.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography

Yi Cui is a Professor in the Department of Materials Science and Engineering at Stanford University. He received his Ph.D in Chemistry at Harvard University (2002), B.S. in Chemistry at the University of Science and Technology of China (1998). He was a Miller Postdoctoral Fellow at University of California, Berkeley before joining Stanford University as an Assistant Professor in 2005. He was awarded tenure in 2010. His current research is on nanomaterials design for energy and environment technology, two dimensional and topological quantum materials. Yi Cui is an Associate Editor of Nano Letters. He is a co-director of the Bay Area Photovoltaic Consortium of the US Department of Energy. He is a highly proliferate materials scientist and has published ~310 research papers, filed more than 40 patent applications and give ~300 plenary/keynote/invited talks. In 2014, he was ranked NO.1 in Materials Science by Thomson Reuters as “The World’s Most Influential Scientific Minds”.

He has received numerous awards including MRS Fellow (2016), MRS Kavli Distinguished Lectureship in Nanoscience (2015), Resonate Award for Sustainability (2015), Inaugural Nano Energy Award (2014), Blavatnik National Award Finalist (2014), Wilson Prize (2011), the Sloan Research Fellowship (2010), KAUST Investigator Award (2008), ONR Young Investigator Award (2008), MDV Innovators Award (2007), Technology Review World Top Young Innovator Award (2004).

He has founded Amprius Inc. (2008) to commercialize the breakthrough high-energy battery technology and co-founded 4C Air Inc. (2015) to commercialize the PM2.5 filtration technology from his lab.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Smart Interfacial Materials from Super-Wettability to Binary Cooperative Complementary Systems

Lei Jiang 1,2,* 1 Technical Institute of Physics and Chemistry, CAS, Beijing 100190, China 2 School of Chemistry and Environment, Beihang University, Beijing 100191, China * [email protected]

Learning from nature and based on lotus leaves and fish scale, we developed super- wettability system: superhydrophobic, superoleophobic, superhydrophilic, superoleophilic surfaces in air and superoleophobic, superareophobic, superoleophilic, superareophilic surfaces under water [1]. Further, we fabricated artificial materials with smart switchable super-wettability [2], i.e., nature-inspired binary cooperative complementary nanomaterials (BCCNMs) that consisting of two components with entirely opposite physiochemical properties at the nanoscale, are presented as a novel concept for the building of promising materials [3-4].

The smart super-wettability system has great applications in various fields, such as self- cleaning glasses, water/oil separation, anti-biofouling interfaces, and water collection system [5].

The concept of BCCNMs was further extended into 1D system. Energy conversion systems that based on artificial ion channels have been fabricated [6]. Also, we discovered the spider silk’s and cactus's amazing water collection and transportation capability [7], and based on these nature systems, artificial water collection fibers and oil/water separation system have been designed successfully [8].

Learning from nature, the constructed smart multiscale interfacial materials system not only has new applications, but also presents new knowledge: Super wettability based chemistry including basic chemical reactions, crystallization, nanofabrication arrays such as small molecule, polymer, nanoparticles, and so on [9].

References [1] Adv. Mater. 2006, 18 (23), 3063-3078. [2] Adv. Mater. 2008, 20 (15), 2842-2858. [3] Pure Appl. Chem. 2000, 72 (1-2), 73-81. [4] Small. 2015, 11, 1071-1096. [5] Adv. Mater. 2011, 23 (6), 719-734. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

[6] (a)Chem. Soc. Rev. 2011, 40 (5), 2385-2401; (b) Acc. Chem. Res. 2013, 46 (12), 2834-2846; (c) Adv. Mater. 2010, 22 (9), 1021-1024. (d) ACS Nano 2009, 3 (11), 3339-3342; (e) Angew. Chem. Int. Ed. 2012, 51 (22), 5296-5307; [7] (a) Nature 2010, 463 (7281), 640-643; (b) Nat Commun 2012, 3, 1247. [8] (a) Nat Commun 2013, 4, 2276; (b) Adv. Mater. 2010, 22 (48), 5521-5525. [9] (a) Chem. Soc. Rev. 2012, 41 (23), 7832-7856; (b) Nat. Commun. 2015, 6, 6737. (c) Adv. Funct. Mater. 2011, 21 (17), 3297-3307; (d) Adv. Mater. 2012, 24 (4), 559-564; (e) Nano Research 2011, 4 (3), 266-273; (f) Soft Matter 2011, 7 (11), 5144-5149; (g Soft Matter 2012, 8 (3), 631-635; (h) Adv. Mater. 2012, 24 (20), 2780-2785; (i) Adv. Mater. 2013, 25 (29), 3968-3972; (j) J. Mater. Chem. A 2013, 1 (30), 8581-8586; (k) Adv. Mater. 2013, 25 (45), 6526-6533

Biography Lei Jiang received his B.S. degree in solid state physics (1987), and M.S. degree in physical chemistry (1990) from Jilin University in China. From 1992 to 1994, he studied in the University of Tokyo in Japan as a China-Japan joint course Ph.D. student and received his Ph.D. degree from Jilin University of China with Prof. Tiejin Li. Then, he worked as a postdoctoral fellow in Prof. Akira Fujishima’s group in the University of Tokyo. In 1996, he worked as researcher in Kanagawa Academy of Sciences and Technology, Prof. Hashimoto’s project. In 1999, he joined Institute of Chemistry, Chinese Academy of Sciences (CAS). In 2015, he moved to the Technoligical Institute of Physics and Chemistry, CAS. Since 2008, he also served as the dean of School of Chemistry and Environment in Beihang University. He was elected as members of the Chinese Academy of Sciences and The World Academy of Sciences in 2009 and 2012. In 2016, he also elected as a foreign member of the US National Academy of Engineering. He has published over 500 papers including 3 papers in Nature, 1 paper in Nature Nanotechnology, 1 paper in Nature Materials, 4 papers in Natural Communication, 2 papers in Chem. Rev., 5 papers in Chem. Soc. Rev., 5 papers in Acc. Chem. Res., 32 papers in Angew. Chem. Int. Ed., 25 papers in J. Am. Chem. Soc., and 83 papers in Adv. Mater, the works have been cited more than 37000 times with an H index of 90.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Controlled Encapsulation of catalysts into metal-organic frameworks

Chia-Kuang Frank Tsung

Abstract: Towards our long-term vision of precisely controlling active sites, our group focuses on incorporating catalysts into crystalline nanoporous materials, metal-organic frameworks (MOFs). The precise molecularly-defined pores intrinsic to the MOFs provide a new tool to control the catalytic transformations on the catalysts. We have developed methods to combine organometallic catalysts, enzymes, and nanoparticle catalysts with MOFs of precisely tuned pore structures to manipulate the reactions.

Shieh, F.-K.; Wang, S.-C.; Yen, C.-I.; Wu, C.-C.; Dutta, S.; Chou, L.- Y.; Morabito, J. V.; Hu, P.; Hsu, M.-H.; Wu, K. C. W.; Tsung, C.-K., Imparting Functionality to Biocatalysts via Embedding Enzymes into Nanoporous Materials by a de novo Approach: Size-Selective Sheltering of Catalase in Metal-Organic Framework Microcrystals. J. Am. Chem. Soc. 2015, 137 , 4276-4279. Hu, P.; Morabito, J. V.; Tsung, C.-K., Core-shell catalysts of metal nanoparticle core and metal-organic-framework shell. ACS Catalysis 2014, 4, 4409-4419. Zhuang, J.; Kuo, C. H.; Chou, L. Y.; Liu, D. Y.; Weerapana, E.; Tsung, C.-K. Optimized Metal-Organic-Framework Nanospheres for Drug Delivery: Evaluation of Small-Molecule Encapsulation. Acs Nano. 2014, 8, 2812-2819. Hu, P.; Zhuang, J.; Chou, L.-Y.; Lee, H. K.; Ling, X. Y.; Chuang, Y.-C.; Tsung, C.-K., Surfactant-Directed Atomic to Mesoscale Alignment: Metal Nanocrystals Encased Individually in Single-Crystalline Porous Nanostructures. J. Am. Chem. Soc. 2014, 136, 10561-10564. Kuo, C. H.; Tang, Y.; Chou, L. Y.; Sneed, B. T.; Brodsky, C. N.; Zhao, Z. P.; Tsung, C.-K., Yolk-Shell Nanocrystal@ZIF-8 Nanostructures for Gas-Phase Heterogeneous Catalysis with Selectivity Control. J. Am. Chem. Soc. 2012, 134 (35), 14345-14348.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Prof. Chia-Kuang Frank Tsung received his undergraduate training at National Sun-Yet Sun University in Taiwan, where he received his B. S. degree. He then moved on to UC Santa Barbara, where he pursued a doctoral degree in the laboratory of Galen D. Stucky. As a graduate student, he carried out research at the forefront of materials chemistry, focusing on the synthesis and characterization of metal and metal oxide nanostructures. After his productive graduate studies, Prof. Tsung moved to UC Berkeley, where he became a postdoctoral fellow with Gabor Somorjai and Peidong Yang. Frank’s postdoctoral work centered on the development of high performance heterogeneous catalysts. Prof. Tsung joined the chemistry faculty at Boston College in the summer of 2010 and has established a compelling research program. Prof. Tsung is interested in identifying new approaches to change the behavior of heterogeneous catalysis in a fundamental way. His research strategy is based on the molecular-level control of the catalytic transformation through tuning of molecule adsorption on active metal surfaces.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Surface and Ligand Chemistry of Quantum Dots

Xiaogang Peng,* Center for Chemistry of Novel & High-Performance Materials, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China * Corresponding author: [email protected]

Colloidal quantum dots are nanometer sized fragments of the corresponding bulk crystals with their sizes in quantum confinement regime and synthesized in solution. Their size-dependent properties and solution processibility are two foundations for their promising applications in many fields. Up to present, scientific research in the field of quantum dots has been focused on their size-dependent properties and solution properties of quantum dots are largely unknown. This talk shall discuss the general principles for understanding solution chemistry properties of nanocrystal-ligands complexes. A nanocrystal-ligands complex refers to an inorganic nanocrystal core stably bonded with a certain number of organic ligands. Experimental results revealed that a batch of nanocrystal-ligands complexes with monodisperse core size and number of ligands would behave similar to a typical molecular solid during dissolution, with a fixed dissolution enthalpy and entropy. This in turn would make the complexes with fixed solubility in a solution. A simple thermodynamic model was proposed to fully account all reslts quantitatively. It further predicts that solubility of the complexes could increase substantially by redesigning the structure of the ligands. Experimental results confirmed these predictions, with solubility of the new types of complexes increasing by 2-6 orders of magnitudes. For extreme cases, solubility of new complexes reached up to 1 gram/ml. Such new complexes were applied for fabrication of electric and optoelectronic devices by solution processing, providing outstanding performances of the devices.

References (1) Dai et al, Nature 2014, 515 (7525), pp 96-99 (2) Yang et al, Nano Lett 2016, 16 (4), pp 2127–2132 (3) Yang et al, Nano Lett 2016, 16 (4), pp 2133–2138

Biography Xiaogang Peng, Professor of Chemistry at Zhejiang University. Obtained his B.S. (1987) and Ph.D (1992) from Jilin University. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

FUNCTIONAL ENERGY MATERIALS: FROM 1D AND 2D POLYMERS TO 3D CARBON NANOMATERIALS

Liming Dai Center of Advanced Science and Engineering for Carbon (Case4Carbon) Departments of Macromolecular Science and Engineering Case School of Engineering, Case Western Reserve University, Cleveland, Ohio, USA Email: [email protected]

It is estimated that the world will need to double its energy supply by 2050. With the rapid increase in the global energy consumption, there is a pressing need for clean and renewable energy alternatives. Polymers have been traditionally used as electrically insulating materials: after all, metal wires are coated in plastics to insulate them. Various conjugated macromolecules with alternating single and double bonds can now be synthesized with unusual electrical and optical properties through the -electron delocalization along their 1D backbones. Due to the molecular rigidity of conjugated backbones, however, most unfunctionalized conjugated polymers are intractable (i.e., insoluble and/or infusible). Nevertheless, a number of synthetic methods have been devised to produce conjugated polymers with the processing advantages of plastics and the optoelectronic properties of inorganic semiconductors for optoelectronic device applications, including polymer photovoltaic cells [1]. Having conjugated all-carbon structures, carbon nanomaterials, including 1D carbon nanotubes (CNTs) and 2D graphene, also possess certain similar optoelectronic characteristics as conjugated macromolecules, apart from their unique structures and associated properties (e.g., surface/size effects) [2]. With the rapid development in nanoscience and nanotechnology, graphitic carbon nanomaterials (e.g., 1D CNTs, 2D graphene) have been playing a more and more important role in the development of efficient energy conversion and storage devices, including solar cells, fuel cells, supercapacitors and batteries [2-6]. The combination of the unique physicochemical properties of graphitic carbon nanomaterials with comparable optoelectronic properties of appropriate conjugated macromolecules has yielded some interesting synergetic effects. Therefore, considerable efforts have recently been made to utilize graphitic carbon nanomaterials, along with polymers, as energy materials, and tremendous progress has been achieved in developing high-performance energy conversion and storage devices based on graphitic carbon nanomaterials and conjugated polymers [7]. More recently, some 2D conjugated polymers and certain 3D graphitic carbon architectures (e.g., CNT-graphene pillared networks, graphene foams) have been demonstrated to show additional advantages for efficient energy conversion and storage [8,9]. In this talk, I will summarize our work on rational design and development of multi- dimensional conjugated polymers and graphitic carbon nanomaterials for efficient energy conversion and storage, including polymer solar cells containing graphitic carbon nanomaterials for improved charge transport, fuel cells and metal-air batteries with carbon nanomaterials/polymers as metal-free catalysts for oxygen reduction and evolution, and flexible 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016 supercapacitors based on CNT-/graphene-based electrodes for energy storage. A brief overview of this exciting field, along with some challenges and opportunities, will also be presented.

References [1] Dai L. “Intelligent Macromolecules for Smart Devices”, Springer-Verlag: Berlin, 2004. [2] Gong K, Du F, Xia Z, Dustock M, Dai L. Science 2009, 323, 760. [3] Yu D, Zhang Q, Dai L, Chen Y. et al., Nat. Nanotechnol. 2014, 9, 555. [4] Dai L, Xue Y, Qu L, Choi H J, Baek J B. Chem. Rev. 2015, 115, 4823. [5] Zhang J, Zhao Z, Xia Z, Dai L. Nat Nanotechnol. 2015, 10, 444. [6] Shui J, Wang M, Du F, Dai L. Sci. Adv. 2015, 1, e1400129. [7] Xu J, Chen Y, Dai L. Nat. Commun. 2015, 6, 8103. [8] Dai L. Acc. Chem. Res. 2013, 46, 31. [9] Lu W, Baek JB, Dai L. (Eds.) “Carbon Nanotechnology for Advanced Energy Systems”, Wiley, 2015.

Biography Liming Dai joined Case Western Reserve University (CWRU) in fall 2009 as the Kent Hale Smith Professor in the Department of Macromolecular Science and Engineering. He is also director of the Center of Advanced Science and Engineering for Carbon (CASE4Carbon). Dr. Dai received a BSc degree from Zhejiang University in 1983, and a PhD from the Australian National University in 1991. He accepted a postdoctoral fellowship from the Cavendish Laboratory at the University of Cambridge, and two years later became a visiting fellow in Department of Materials Science and Engineering at the University of Illinois at Urbana- Champaign. He spent 10 years with the Commonwealth Scientific and Industrial Research Organization (CSIRO) in Melbourne, Australia. Before joining the CWRU, he was an associate professor of polymer engineering at the University of Akron and the Wright Brothers Institute Endowed Chair Professor of Nanomaterials at the University of Dayton. Dr. Dai’s expertise covers the synthesis, functionalization, and device fabrication of conjugated polymers and carbon nanomaterials for energy-related and biomedical applications. He has published more than 400 scientific papers, a research monograph on intelligent macromolecules (Springer), an edited book on carbon nanotechnology (Elsevier), and held about 30 issued/applied patents. He has also published two co-edited books on carbon nanomaterials for advanced energy systems (Wiley), and carbon nanomaterials and nanotechnology for biomedical applications (Springer). Dr. Dai serves as an Associate Editor of Nano Energy (Elsevier) and is a Highly Cited Researcher (Thomson Reuters). He is a Fellow of the Royal Society of Chemistry and Fellow of the American Institute for Medical and Biological Engineering (AIMBE). 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Surface Coordination Chemistry of Nanomaterials

Pengxin Liu,1 Yun Zhao,1 Guangxu Chen, Gang Fu, Nanfeng Zheng1,* 1 Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, Xiamen University, Xiamen 361005, China * Corresponding author: [email protected]

Surface of nanomaterials plays an important role in determining many of their physical and chemical properties. The synthesis of high-quality metal nanoparticles often involves the use of organic capping agents. However, due to the lack of effective tools to characterize the surface structure of small ligands on metal nanoparticles, it is extremely challenging to deeply understand how surface ligands influence the core structure and also overall properties of metal nanoparticles. This presentation will focus on our recent progress in understanding the surface coordination chemistry of nanomaterials. The importance of small ligands in controlling the surface structure and morphology of metal nanocrystals and nanoclusters will be first discussed. We will then talk about how the surface ligands influence the catalytic performance of metal nanocrystals. The presence of surface ligands on metal nanoparticles are often considered deleterious to their catalysis applications. However, in this talk, some examples including metal nanoclusters and ultrathin metal nanocrystals will be given to discuss how surface ligands promote the catalysis of metal nanoparticles.1,2 Also presented will be our recent work on the photochemical preparation of atomically dispersed palladium catalysts and their unique catalytic mechanism with the involvement of surface ligands.3

References (1) Wang, Y.; Wan, X. K.; Ren, L. T.; Su, H. F.; Li, G.; Malola, S.; Lin, S. C.; Tang, Z. C.; Häkkinen, H.; Teo, B. K.; Wang, Q. M.; Zheng, N. F. J. Am. Chem. Soc. 2016, 138, 3278. (2) Chen, G. X.; Xu, C. F.; Huang, X. Q.; Ye, J. Y.; Gu, L.; Li, G.; Tang, Z. C.; Wu, B. H.; Yang, H. Y.; Zhao, Z. P.; Zhou, Z. Y.; Fu, G.; Zheng, N. F. Nature Mater. 2016, 15, 564. (3) Liu, P. X.; Zhao, Y.; Qin, R. X.; Mo, S. G.; Chen, G. X.; Lin, G.; Chevrier, D. M.; Zhang, P.; Guo, Q.; Zang, D. D.; Wu, B. H.; Fu, G.; Zheng, N. F. Science 2016, 352, 797. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography

Professor Nanfeng Zheng received his B.S. from the Department of Chemistry, Xiamen University in 1998. In 2005, he obtained his Ph.D. degree from the Department of Chemistry, Univ. of California –Riverside. During 2005-2007, he worked on gold catalysis with Prof. Galen D. Stucky as a research associate at Univ. of California – Santa Barbara. In 2007, he moved to Xiamen Univ. as a full professor. He is currently a Changjiang Chair professor at Xiamen Univ.. Dr. Zheng’s research interests mainly focus on the development of advanced functional materials for both fundamental research and practical applications, particularly in the fields of catalysis, energy, environmental science and biology. Most of current research efforts of his group are directed to: 1) metal nanocrystals well- defined exposed surfaces; 2) molecular mechanisms of surface and interface effects in heterogeneous catalysts; 3) surface and interface chemistry in solar energy utilization and energy storage systems; and 4) chemistry of nanoclusters. He has published 110 articles with over 7600 citations

Tuning Nanoparticle Catalysis for Efficient Electrochemical Reactions Shouheng Sun Department of Chemistry, Brown University, Providence, RI 02912, USA. Email: [email protected]

Recent advance in solution phase chemical reactions has made it possible to design and synthesize nanoparticles with nearly precise controls on nanoparticle sizes, shapes, compositions and structures for catalytic applications. In this talk, I will summarize the common methods we used to synthesize monodisperse nanoparticles, especially intermetallic nanoparticles, core/shell nanoparticles, nanowires and their self-assemblies on a conducting support. I will use Au-, Pt-, Fe-, Co- and Cu-based elemental and alloy nanoparticles as examples to demonstrate the rational tuning and enhancement of nanoparticle catalysis for selective electrochemical reduction of oxygen or carbon dioxide, and oxidation of formic acid for renewable energy applications.

Biography

Shouheng Sun received his BSc from Sichuan University in 1984 and MSc from Nanjing University in 1987. After his MSc study, he became a Lecture in the Coordination Chemistry Institute of Nanjing University from 1987-1992. In 1992, he was admitted to the Department of Chemistry of Brown University as a graduate student and received his PhD in 1996 from Professor D. A. Sweigart group. He joined the IBM T. J. Watson Research Center first as a postdoctoral fellow, working under the supervision of Dr. C. B. Murray from 1996-1998 and then as a research staff member from 1998-2004. In 2005, he returned to Brown as a tenured Associate Professor and was promoted to full Professor in 2007. He is now the Professor of Chemistry and Engineering, co-Director of the Institute of Molecular and Nanoscale Innovation of Brown University, Associated Editor of the journal Nanoscale and the Fellow of the Royal Society of Chemistry. His research interests are in chemical synthesis and self-assembly of nanoparticles for magnetic, catalytic and medical applications.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Functional scanning probe microscopy in operando energy nanodevices

Liwei Chen 1,* 1 i-Lab, Suhou Institute of Nanotech and Nanobionics, Chinese Academy of Sciences , Jiangsu , 215123 , China * Corresponding author: [email protected]

Scanning probe microscopy has been a major technical breakthrough behind the explosive development of nanoscience and nanotechnology. Among the various SPM techniques, atomic force microscopy is unique in its versatile imaging capability and facile imaging modes, and thus is highly promising for in-situ and operando imaging towards the interfacial characterization in energy nanodevices. However, typical AFM imaging obtains information regarding sample topography; therefore, it is critical to demonstrate functional imaging modes of SPM for operando energy nanodevices.

In this talk, we will show the application of in-situ topographical imaging of Li ion battery electrode/electrolyte interface, and the study of the mechanical properties using force spectroscopy [1]. Furthermore, functional imaging modes including scanning Kelvin probe microscopy and dielectric force microscopy methods are developed and employed to investigate the charge carrier properties in nanomaterials as well as the device operating mechanisms in thin-film photovoltaic devices [2,3,4].

References [1] Chen L. W.; et al., Nano Letters, 12, 2153-2157 (2012) [2] Chen L. W.; et al., Accounts of Chemical Research, 48, 1788-1796 (2015) [3] Chen L. W.; et al., Nature Communications, 6, 7745 (2015) [4] Chen L. W.; et al., Advanced Materials, 23, 4636-4643, (2011)

Biography Liwei Chen got his B.S. from USTC in 1993, and M.S. from Peking Univ. in 1996. After obtaining his Ph.D. from the Lieber group at Harvard University in 2001, Liwei moved to NYC for a joint postdoctoral position between Columbia and IBM Watson research center. In 2004, Liwei joined the Department of Chemistry and Biochemistry at Ohio Univ. as an assistant professor. He moved Suzhou Institute of Nanotech and Nanobionics, CAS in 2009. His current research interests focus on materials and interfaces in energy nanotechnology.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Data Processing Algorithms: An Unexpected Tool for Designing Nanopatterns

Jiaxing Huang Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA Email: [email protected]

Materials processing is the foundation of materials science and engineering. Advances in materials processing not only enables widespread applications of new materials and new technologies, it can also inspire new areas of interdisciplinary science. In honor of Prof. Peidong Yang’s Nano Research Award, I will start with two short stories about Langmuir-Blodgett colloidal assembly and nanofluidics, showing how we have advanced what I learned (while carrying out postdoctoral research in his group) to a new level based on breakthroughs in materials processing. Then I will discuss an unusual example of how information processing algorithms used for data storage can be repurposed as a tool to design nanophotonic patterns.

References [1] Nie, H.L., Dou, X., Tang, Z., Jang, H.D. and Huang, J. J. Am. Chem. Soc., 2015, 137,10683. [2] Koltonow, A.R. and Huang, J. Science, 2016, 351, 1395 [3] Shao, J.J., Raidongia, K., Koltonow, A.R. and Huang, J. Nature Comm., 2015, 6, 7602 [4] Yeh, C.N., Raidongia, K., Shao, J.J., Yang, Q.H. and Huang, J. Nature Chem., 2015, 7, 166 [5] Raidongia, K. and Huang, J. J. Am. Chem. Soc., 2012, 134, 16528 [6] Smith, A.J., Wang, C., Guo, D., Sun, C. and Huang, J. Nature Comm., 2014, 5, 5517 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Jiaxing Huang is an Associate Professor of Materials Science and Engineering at Northwestern University. He received his B.S. degree in Chemical Physics from University of Science and Technology of China in 2000, Ph.D. in chemistry from UCLA in 2004, and became a Miller Research Fellow at UC Berkeley before joining Northwestern in 2007. His main research interest is in the general area of material chemistry, processing and manufacturing. In teaching, he encourages students to develop intuition and exercise creativity. In addition to early career awards from the National Science Foundation, the Sloan Foundation, the Society of Manufacturing Engineers and the Prairie Chapter of American Vacuum Society, his work has been recognized by a quadrennial Fissan-Pui-TSI Award from the International Aerosol Research Assembly, a Guggenheim Fellowship and a JSPS Fellowship. He has also been named by Thompson Reuters as a Highly Cited Researcher in Chemistry.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Crystal Phase-Controlled Synthesis of Novel Noble Metal Nanomaterials

Hua Zhang1,* 1 School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore * Corresponding author: [email protected]

In this talk, I will summarize the recent research on the crystal phase-controlled synthesis of novel noble metal nanomaterials in my group. It includes the first-time synthesis of hexagonal- close packed (hcp) Au nanosheets (AuSSs) on graphene oxide [1], surface-induced phase transformation of AuSSs from hcp to face-centered cubic (fcc) structures [2], alternating hcp/fcc Au square-like plates from AuSSs [3], ultrathin Au nanowires containing hcp phase [4], synthesis of ultrathin fcc Au@Pt and Au@Pd rhombic nanoplates through the epitaxial growth of Pt and Pd on the hcp AuSSs, respectively [5], the first-time synthesis of 4H hexagonal phase Au nanoribbons (NRBs) and their phase transformation to fcc Au RNBs, the epitaxial growth of Ag, Pt, Pd, PtAg, PdAg, PtPdAg on 4H Au NRBs to form the 4H/fcc Au@metal core–shell NRBs [6], and the synthesis of 4H/fcc-Au@metal sulfide core-shell NRB heterostructures [7]. In addition, the concept of crystal-phase noble metal heterostructures is proposed [8].

References (1) X. Huang, et al., Nat. Commun. 2011, 2, 292. (2) Z. X. Fan, et al., Nat. Commun., 2015, 6, 6571. (3) X. Huang, et al., Angew. Chem. Int. Ed. 2011, 50, 12245. (4) X. Huang, et al., Adv. Mater. 2012, 24, 979. (5) Z. X. Fan, et al., Angew. Chem. Int. Ed., 2015, 54, 5672. (6) (a) Z. X. Fan, et al., Nat. Commun., 2015, 6, 7684. (b) Z. X. Fan, et al., J. Am. Chem. Soc., 2016, 138, 1414. (7) Z. X. Fan, et al., J. Am. Chem. Soc., 2015, 137, 10910. (8) H. Zhang, ACS Nano, 2015, 9, 9451.

Biography Dr. Hua Zhang obtained his B.S. and M.S. degrees at Nanjing University in China in 1992 and 1995, respectively, and completed his Ph.D. with Prof. Zhongfan Liu at Peking University in China in July 1998. He joined Prof. Frans C. De Schryver’s group at Katholieke Universiteit Leuven (KULeuven) in Belgium as a Research Associate in January 1999. Then he moved to Prof. Chad A. Mirkin’s group at Northwestern University as a Postdoctoral Fellow in July 2001. He started to work at NanoInk Inc. (USA) as a Research Scientist/Chemist in August 2003. After that, he worked as a Senior 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Research Scientist at Institute of Bioengineering and Nanotechnology in Singapore from November 2005 to July 2006. Then he joined the School of Materials Science and Engineering in Nanyang Technological University (NTU) as an Assistant Professor. He was promoted to a tenured Associate Professor on March 1, 2011, and Full Professor on Sept. 1, 2013. He has published 5 invited book chapters, 62 patent applications (including 8 granted US patents), and over 360 papers, among which 326 papers were published in the journals with IF>3 (including 136 papers published in IF>10 journals and 65 papers published in 8

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

2D Electronics: Opportunities and Challenges Xiangfeng Duan

Department of Chemistry and Biochemistry, California Nanosystems Institute, University of California, Los Angeles, CA 90095, USA

Two-dimensional materials such as graphene and MoS2 have attracted intense interest as alternative electronic materials in the post-silicon era. Graphene features exceptionally high carrier mobility but is limited by its semimetal nature and cannot be used for transistors with sufficient on-off ratio. Two-dimensional semiconductors (2DSCs) such as MoS2 exhibit an intrinsic band gap and can enable transistors with high on-off ratio, but are limited by relatively low carrier mobility and poor on-current density. Despite intense interest and effort to date, it remains an open question whether 2DSC transistors can offer competitive performance matching up to exceeding that of the silicon devices. To achieve a high performance (high on-current) device requires (1) a pristine channel with high carrier mobility, (2) an optimized contact with low contact resistance and (3) a short channel length. The simultaneous optimization of these parameters is of considerable challenge for the atomically thin 2DSCs since the typical low contact resistance approaches either degrade the electronic properties of the channel or are incompatible with the fabrication of short channel devices. Here I will review various strategies for optimizing these factors, and discuss how these strategies can be combined together to achieve high performance 2D transistors. In particular, I will discuss a unique approach towards high-performance MoS2 transistors using a physically assembled nanowire as a lift-off mask for creating ultra-short channel devices with pristine MoS2 channel and self-aligned low resistance metal/graphene/MoS2 hybrid contact, and demonstrate sub-100 nm MoS2 transistors with a record-high on-current density comparing well with that of silicon devices. We will also discuss possible strategies to further push the limit of 2D transistors. Lastly, we will also discuss a new design of 2D- material-based vertical transistors that can enable new device functions or unprecedented combination of device performance and flexibility. I will conclude with a brief summary of the current challenges and future opportunities in 2D electronics. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Bio: Dr. Duan received his B.S. Degree from University of Science and Technology of China in 1997, and Ph.D. degree from Harvard University in 2002. He was a Founding Scientist and then Manager of Advanced Technology at Nanosys Inc., a nanotechnology startup founded based partly on his doctoral research. Dr. Duan joined UCLA with a Howard Reiss Career Development Chair in 2008, and was promoted to Associate Professor in 2012 and Full Professor in 2013. Dr. Duan’s research interest includes nanoscale materials, devices and their applications in future electronics, energy technologies and biomedical science. A strong emphasis is placed on the hetero-integration of multi-composition, multi-structure and multi-function at the nanoscale, and by doing so, creating a new generation of integrated nanosystems with unprecedented performance or unique functions to break the boundaries of traditional technologies. Dr. Duan has published over 160 papers in leading scientific journals, and holds over 40 issued US patents and many more published applications. For his pioneer research in nanoscale science and technology, Dr. Duan has received many awards, including MIT Technology Review Top-100 Innovator Award, NIH Director’s New Innovator Award, NSF Career Award, Alpha Chi Sigma Glen T. Seaborg Award, Herbert Newby McCoy Research Award, US Presidential Early Career Award for Scientists and Engineers (PECASE), ONR Young Investigator Award, DOE Early Career Scientist Award, Human Frontier Science Program Young Investigator Award, Dupont Young Professor, Journal of Materials Chemistry Lectureship, International Union of Materials Research Society and Singapore Materials Research Society Young Researcher Award, the Beilby Medal and Prize, and Nano Korea Award. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Carbon-Based Nanostructures for Energy Conversion and Storage: Synthesis, Performance and Mechanism

Zheng Hu（胡征） Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China. Email: [email protected]

Fuel cells, supercapacitors and lithium-sulphur batteries are the typical energy conversion and storage devices of great significance in which carbon-based nanostructures play irreplaceable role. The functionalized carbon-based nanostructures could be applied to fuel cells to lower Pt loading by highly dispersing and immobilizing Pt-based nanoparticles, or to totally get rid of Pt with the metal-free electrocatalytic ability themselves. The abundant nanostructures and morphologies, tunable compositions, high surface area, good conductivity, small volume expansion, as well as the low cost and environmental benignity make the carbon-based nanostructures have great potential as electrode materials of supercapacitors and lithium-sulphur batteries. In this talk I will give a brief introduction to the progressive advancements in our group about the synthesis, performance and mechanism of carbon-based nanostructures, especially the nanocages, for this kind of energy conversion and storage [1-10]. Special attention will be paid to the carbon-based nanomaterials doped with electron-rich N [2], electron-deficient B [3], and the both [4], as well as to the dopant-free carbon nanomaterials [5], to elucidate the correlation of performance with electronic configuration, which is a general interesting issue in developing the advanced carbon- based energy materials.

References [1] Y. J. Tian, Z. Hu, Y. Yang, X. Z. Wang, X. Chen, H. Xu, Q. Wu, W. J. Ji, and Y. Chen, J. Am. Chem. Soc. 126 (2004) 1180 [2] S. Chen, J. Y. Bi, Y. Zhao, L. J. Yang, C. Zhang, Y. W. Ma, Q. Wu, X. Z. Wang, and Z. Hu, Adv. Mater. 24 (2012) 5593 [3] L. J. Yang, S. J. Jiang, Y. Zhao, L. Zhu, S. Chen, X. Z. Wang, Q. Wu, J. Ma, Y. W. Ma, and Z. Hu, Angew. Chem. Int. Ed. 50 (2011) 7132 [4] Y. Zhao, L. J. Yang, S. Chen, X. Z. Wang, Y. W. Ma, Q. Wu, Y. F. Jiang, W. J. Qian, and Z. Hu, J. Am. Chem. Soc. 135 (2013) 1201 [5] Y. F. Jiang, L. J. Yang, T. Sun, J. Zhao, Z. Y. Lyu, O. Zhuo, X. Z. Wang, Q. Wu, J. Ma, and Z. Hu, ACS Catal. 5 (2015) 6707 [6] S. J. Jiang, Y. W. Ma, G. Q. Jian, H. S. Tao, X. Z. Wang, Y. N. Fan, Y. N. Lu, Z. Hu and Y. Chen , Adv. Mater. 21 (2009) 4953 [7] Y.W. Ma, S. J. Jiang, G.Q. Jian, H.S. Tao, L.S. Yu, X.B. Wang, X.Z. Wang, J.M. Zhu, Z. Hu and Y. Chen, Energy Environ. Sci. 2 (2009) 224 [8] J. Zhao, H. W. Lai, Z. Y. Lyu,Y. F. Jiang, K. Xie, X. Z. Wang, Q. Wu, L. J. Yang, Z. Jin, Y. W. Ma, J. Liu, and Z. Hu, Adv. Mater. 27 (2015) 3541 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

[9] K. Xie, X. T. Qin, X. Z. Wang, Y. N. Wang, H. S. Tao, Q. Wu, L. J. Yang, and Z. Hu, Adv. Mater. 24 (2012) 347 [10] Z. Y. Lyu, D. Xu, L. J. Yang, R. C. Che, R. Feng, J. Zhao, Y. Li, Q. Wu, X. Z. Wang, Z. Hu, Nano Energy 12 (2015) 657

Biography Zheng Hu received his BS (1985) and PhD (1991) degrees in physics from Nanjing University. After two-year’s postdoctoral research in Department of Chemistry, he became an associate professor in 1993, full professor in 1999, and Cheung Kong Chair professor in 2007. He obtained National Science Fund for Distinguished Young Scholars of China in 2005. He spent two years in Research Center of Karlsruhe (Germany), University of Cambridge (UK), and MIT (USA) as a postdoctoral fellow or Hwa-Ying scholar, respectively. Hu has mainly worked in the research field of physical chemistry of energy nanomaterials. As the principal scientist, he has finished more than 15 research projects with honor and published more than 200 papers in peer-reviewed journals, and is the principal inventor of 20 Chinese patents.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

邀请报告 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Probing Dirac electron physics in graphitic materials

Feng Wang Physics Department, UC Berkeley and Materials Science Deivision, LBNL, USA Email: [email protected]

Electrons in monolayer graphene are described by massless Dirac electrons, which exhibit unique quantum phenomena due to the pseudospin and Berry phase of the massless electrons. In this talk, I will discuss our effort in probing massive Dirac electrons in gapped bilayer graphene, which can be described by a quantum valley Hall insulator with nontrivial Chern number for individual valleys. We show that a tunable bandgap up to 200 meV can be induced in bilayer graphene with electrical gating [1]. In addition, we observe a topologically protected 1D conducting channel at the domain boundary of AB-BA bilayers, which can be attributed to the quantum valley Hall edge states in gapped bilayer graphene [2]. I will also discuss one-dimensional plasmon arising from Luttinger liquid of Dirac electrons in metallic carbon nanotubes, which exhibit semi-quantized propagation speed and remarkable sub-wavelength plasmon confinement [3].

References [1] Y. Zhang, T.-T. Tang, et al, "Direct observation of a widely tunable bandgap in bilayer graphene", Nature, 459 820-823 (2009). [2] L. Ju, Z. Shi, et al, "Topological valley transport at bilayer graphene domain walls", Nature, 520 650-656 (2015). [3] Z. Shi, X. Hong, et al, Nature Photonics, 9, 515-519 (2015).

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Feng Wang is an associate professor of physics at the university of California, Berkeley. His research interests have been in ultrafast nano-optics, with special focus on graphene, carbon nanotubes, and plasmonic nanostructures. He has been awarded the Sloan Fellowship, Outstanding Young Researcher Award of Overseas Chinese Physics Association, International Union of pure and Applied Physicists (IUPAP) C10 Young Scientist Prize, Hellman Family Faculty Award, Packard Fellowship, and the Presidential Early Career Award for Scientists and Engineers. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Exploring organic semiconductors at the two-dimensional limit

Daowei He, 1 Yuhan Zhang, 1 Bing Wu, 1 Xiaolong Liu, 1 Yun Li, 1 Yi Shi, 1 Jian-Bin Xu, 2 Xinran Wang 1,* 1 School of Electronic Science and Engineering, Nanjing University 2 Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong * Corresponding author: [email protected]

It has been well known for 20 years that in organic field-effect transistors (OFETs), the most fundamental device unit in organic electronics, charge transport occurs two- dimensionally in the first few molecular layers near the dielectric interface. Although the mobility of bulk organic semiconductors has dramatically increased over the past two decades, growth of high-quality few-layer organic crystals and the probing of their intrinsic charge transport still remains difficult due to excessive disorders and traps in ultrathin organic films. In this talk, I will show that van der Waals epitaxy of high-quality molecular crystal down to monolayer is possible on graphene and BN. This class of materials can not only make high-performance OFETs but also serve as a powerful platform to study intrinsic structure-property relationship. Precise control of epitaxy offers new possibilities in achieving well-defined heterostructures based on organic materials.

References (1) Daowei He, Yuhan Zhang, Qisheng Wu, Rui Xu, Haiyan Nan, Junfang Liu, Jianjun Yao, Zilu Wang, Shijun Yuan, Yun Li, Yi Shi, Jianlan Wang, Zhenhua Ni, Lin He, Feng Miao, Fengqi Song, Hangxun Xu, K. Watanabe, T. Taniguchi, Jian-Bin Xu and Xinran Wang, Nature Communications 5, 5162 (2014). (2) Daowei He, Yiming Pan, Haiyan Nan, Shuai Gu, Ziyi Yang, Bing Wu, Xiaoguang Luo, Bingchen Xu, Yuhan Zhang, Yun Li, Zhenhua Ni, Baigeng Wang, Jia Zhu, Yang Chai, Yi Shi and Xinran Wang, Applied Physics Letters 107, 183103 (2015). (3) Yuhan Zhang, Jingsi Qiao, Si Gao, Fengrui Hu, Daowei He, Bing Wu, Ziyi Yang, Bingchen Xu, Yun Li, Yi Shi, Wei Ji, Peng Wang, Xiaoyong Wang, Min Xiao, Hangxun Xu, Jian-Bin Xu and Xinran Wang, Physical Review Letters 116, 016602 (2016).

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Professor Xinran Wang received his Ph.D degree in physics from Stanford University in 2010. Between 2010 and 2011, he was a postdoctoral researcher in Porf. Hongjie Dai group at Stanford University and then in Prof. John Rogers group at University of Illinois at Urbana-Champaign. In 2011, he joined Nanjing University as a professor in the School of Electronic Science and Engineering. Prof. Wang's current research interest includes synthesis, properties and device applications of low-dimensional materials.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Electric Control of Spin-Coupled Valleytronics in Layered Metal Dichalcogenides

Hongtao Yuan* 1Geballe Laboratory for Advanced Materials, Stanford University, California 94305 USA. 2Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, California 94025, USA * Corresponding author: [email protected]

Recent efforts on two dimensional atomic layer materials, aiming at novel electronic properties and quantum phenomena beyond graphene, have attracted much attention for potential electronics/spintronics applications. Compared to the weak spin-orbit-interaction (SOI) in graphene, layered transition-metal chalcogenides MX2 (M = Mo, W; X = S, Se, Te) have heavy 4d/5d elements with strong atomic SOI, providing a unique way to extend functionalities of novel spintronics and valleytronics devices based on valleytronics physics by considering the valley degree of freedom in MX2 dichalcogenides. For example, in WSe2, with a layered honeycomb lattice and two inequivalent valleys in the k-space electronic structure in the hexagonal Brillion zone, due to the large separation of valleys in k-space and the resulting suppression of intervalley scattering, the valley index can be used in analogy to the spin in spintronics, opening a new research direction called ‘valleytronics’. Such a valley polarization achieved via valley-selective circular dichroism has been predicted theoretically and demonstrated with optical experiments in those MX2 systems.

However, despite this exciting progress, the following two important issues in MX2 valleytronics community remain elusive: 1) The most current understanding of their electronic structures is based on either theoretical investigations or indirect experimental techniques (e.g. optical measurements), leaving the detailed band structures elusive, especially the valley location (the band maxima/minima) in the BZ have not been experimentally confirmed yet. Therefore a direct detection for band dispersion becomes of great importance for valleytronics especially for those cleaved ultrathin mono- and bi-layer flakes hosting most of recently-reported exotic phenomena in the 2D limit. 2) The generation of a valley/spin current by the valley polarization in MX2 remains elusive and a great challenge. A spin/valley current in MX2 compounds caused by such a valley polarization has never been observed, nor its electric-field control.

In this talk, we will present the basic electronic structure of representative MX2, obtained by angular resolution photoemission spectroscopy (ARPES), and investigate both the variation of the band minima/maxima (the valley locations) between these compounds and their band evolution from bulk to the monolayer limit. After having a systematic understanding of the band structure, 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

we will demonstrate, within an electric-double-layer transistor based on WSe2, the manipulation of a spin-coupled valley photocurrent whose direction and magnitude depend on the degree of circular polarization of the incident radiation and can be further greatly modulated with an external electric field. Such room temperature generation and electric control of valley/spin photocurrent provides a new property of electrons in MX2 systems, thereby enabling new degrees of control for quantum-confined spintronics devices. (This work was supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under contract DE-AC02-76SF00515.)

References 1. H. T. Yuan, X. Q. Wang, B. Lian, H. J. Zhang, X. F. Fang, B. Shen, G. Xu, Y. Xu, S.-C. Zhang, H. Y. Hwang and Y. Cui. Generation and electric control of spin-coupled valley

current in WSe2. Nature Nanotech. 9, 851-857 (2014). 2. H. T. Yuan, M. B. Saeed, K. Morimoto, H. Shimotani, K. Nomura, R. Arita, Ch. Kloc, N. Nagaosa, Y. Iwasa. Zeeman-type spin splitting controlled with an external electric field. Nature Phys. 9, 563-569 (2013). 3. H. T. Yuan, Z. K. Liu, G. Xu, S. F. Wu, D. Dumcenco, K. Yan, Y. Zhang, S. K. Mo, P. Dudin, V. Kandyba, M. Yablonskikh, A. Barinov, Z. X. Shen, S. C. Zhang, Y. S. Huang, X. D. Xu, Z. Hussain, H. Y. Hwang, Y. Cui, Y. L. Chen. Electronic Structure Evolution between Different Transition-Metal Chalcogenides and from Bulk to the Mono-Layer Limit. Nano Lett. Accepted 2016.

Biography Hongtao Yuan is an associated Staff Scientist at Geballe Laboratory for Advanced Materials (GLAM) in Stanford University and at Stanford Institute for Materials and Energy Sciences (SIMES) in SLAC National Accelerator Laboratory, USA. After he obtained his Ph. D. degrees in Qikun Xue group (2007) from Institute of Physics, Chinese Academic of Sciences, he became a postdoc researcher (2007–2009, Tohoku University) with Prof. Yoshihiro Iwasa and then a Research Associate (2010-2011), an Assistant Professor (2011–2012) in the same group (Yoshihiro Iwasa group) at Quantum Phase Electronics Center (QPEC) in the University of Tokyo. From 2012 to 2015, he started the physics scientist research associate position in Harold Y. Hwang group and Yi Cui group at Geballe Laboratory for Advanced Materials in Stanford University and at Stanford Institute for Materials and Energy Sciences in SLAC National Accelerator Laboratory. He promoted to be an associated Staff Scientist in 2015 and now his research interest is “Interfacial emergent phenomena induced by an electric field”. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Gas sensors based on nanomaterials in non-invasive diagnosis

Xiaoshan Wang,1 Zhiwei Wang,1 Kai Yang,1 Xiao Huang,1* Wei Huang1* 1 Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China

*Corresponding author: [email protected]; [email protected]

Development of gas sensors for detection of volatile organic compounds (VOCs) are important in the non-invasive diagnosis of diseases based on breath analysis [1,2]. Exploration of novel sensory materials is the key to realization of highly sensitive and selective detection of VOCs [3]. Nanostructured materials, including inorganic and organic crystals, offer promising sensing platforms for effective VOC detection [3]. For example, two dimensional (2D) materials such as graphene and transition metal dichalcogenide nanosheets have received tremendous attention in the past decade, and found wide applications in sensing various chemical and biological species [4,5]. Their properties are found to be highly dependent on their morphology, crystal structure, composition, surface chemistry and so on [4]. In this presentation, I will introduce our recent effort on the development of chemiresistive sensors based on 2D materials and/or their hybrids with porous organic crystals for VOC detection.

References (1) M. G. Campbell, S. F. Liu, T. M. Swager, M. Dincă, J. Am. Chem. Soc. 2015, 137, 13780. (2) J. S. Kim, H. W. Yoo, H. O. Choi, H. T. Jung, Nano Lett. 2014, 14, 5941. (3) G. Konvalina, H. Haick, Acc. Chem. Res. 2013, 47, 66. (4) X. Huang, Z. Y. Zeng, H. Zhang, Chem. Soc. Rev. 2013, 42, 1934. (5) Q. He, S.Wu, Z. Yin, H. Zhang, Chem. Sci. 2012, 3, 1764.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Dr. Xiao Huang received her bachelor degree at the School of Materials Science and Engineering of Nanyang Technological University in Singapore in 2006. At the same university, she completed her PhD under the supervision of Professor Hua Zhang and Professor Freddy Boey in 2011. After that, she worked as a postdoctoral fellow in Professor Hua Zhang’s group. She is now a professor at the Institute of Advanced Materials of Nanjing Tech University in China. She has published over 60 papers, such as Nature Communications, Chemical Society Reviews, Advanced Materials and so on, with a citation of over 8000 times and an h-index of 35. Her current research interest includes the synthesis and application of nanomaterial-based hybrid structures for non-invasive disease diagnosis.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

New Two-Dimensional Crystals: Controlled Synthesis and Optoelectronic Devices

Hailin Peng Center for Nanochemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China Email: [email protected]

The unique structure and properties of two-dimensional (2D) crystals have a large impact on fundamental research as well as applications in electronics, photonics, optoelectronics and energy sciences. Here our recent studies on the controlled synthesis of new 2D crystals such as bismuth oxychalcogenide (BOX), topological insulator V2VI3 nanostructures, other layered III-VI and VI- VI chalcogenides and their hybrid materials, as well as their optoelectronic properties will be discussed[1-12]. We propose a method combined with micro-contact printing growth and van der Waals epitaxy to achieve the controlled growth of various 2D crystal arrays with well-aligned orientation, controlled thickness, and specific placement, which can be used for efficient photodetection applications. Our studies suggest that functional 2D crystals hold great promise for future electronic and optoelectronic applications.

References [1] Zheng, W.; Peng, H.; et al., Nature Comm. 2015, 6, 6972. [2] Zhang, C.; Peng, H.; Liu, Z.; et al., Nature Comm. 2015, 6, 6519. [3] Yin, J.; Wang, H.; Chen, Y.; Peng, H.; Liu, Z.; et al., Nature Comm. 2016, 7, 10699. [4] Peng, H.; Lai, K.; Cui Y.; et al., Nature Materials 2010, 9, 225. [5] Peng, H.; et al., Nature Chemistry 2012, 4, 281. [6] Li, H.; Peng, H.; et al., J. Am. Chem. Soc. 2012, 134, 6132. [7] Lin, M.; Peng, H.; et al., J. Am. Chem. Soc. 2013, 135, 13274. [8] Guo, Y.; Peng, H.; et al., Adv. Mater. 2013, 25, 5959. [9] Guo, Y.; Peng, H.; et al., Adv. Mater. 2015, 27, 4315. [10] Zhou, Y.; Peng, H.; et al., Nano Lett. 2016, 6, 2103. [11] Zhou, X.; Wu, S.; Peng, H.; Liu, K.; et al., J. Am. Chem. Soc. 2015, 137, 7994. [12] Deng, B.; Hsu, P.; Cui, Y.; Liu, Z.; Peng, H.; et al., Nano Lett. 2015, 15, 4206.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Hailin Peng was born in Hunan, China. He received his B.S. in chemistry from Jilin University in 2000, and a PhD in physical chemistry from Peking University in 2005, working under the guidance of Professor Zhongfan Liu on nanochemistry and STM lithography. He pursued postdoctoral studies on nanomaterials science and engineering with Professor Yi Cui at Stanford University during 2005–2009. He became an associate professor in the College of Chemistry and Molecular Engineering at Peking University in June 2009 and has been promoted to a full professor in 2014. He is working on nanomaterials science and engineering towards the better performance of nanoelectronics, wearable devices, photodetectors, and batteries. Currently, his research interests have been focused on: (1) controlled growth, chemical modifications, heterostructures and optoelectronic devices of two-dimensional Dirac materials such as graphene and nanostructured topological insulator; (2) synthesis and optoelectronic devices of novel two-dimensional crystals and their hybrid materials. He has published more than 100 research papers on international journals, including Nature Materials, Nature Chemistry, Nature Nanotechnology, Nature Communications, Phys. Rev. Lett., J. Am. Chem. Soc., Nano Lett., Adv. Mater., etc. He has obtained National Science Fund for Distinguished Young Scholars of China (2015), National Science Fund for Excellent Young Scholars of China (2012), National Program for Support of Top-Notch Young Professionals (2012), New Century Excellent Talents in University (2011), The Fok Ying-Tong Education Foundation, China (2013).

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Interface Engineering for 2D Phosphorene Based Optoelectronic Devices Zehua Hu, 1 Cheng Han, 1 Du Xiang, 1 Wei Chen 1,2,* 1Department of Physics National University of Singapore, Singapore 117542, Singapore 2Department of Chemistry, National University of Singapore, 117543, Singapore * Corresponding author: [email protected]

Black phosphorus (BP), as a fast-emerging two-dimensional (2D) material, stands out from other members in 2D family such as graphene and transition metal dichalcogenides (TMDs), and attracts substantial research interests attributed to its remarkably unique fundamental properties and versatile device applications. In this talk, I will summarize and discuss our recent work for interface engineered 2D materials phosphorene based field-effect-transistors (FETs) and photo-transistors, through the combination of in-situ FET device evaluation and photoelectron spectroscopy investigation. We will particularly emphasize on the electron and hole doping effect on the transport properties and optoelectronic response of phosphorene devices.

References (1) “Surface Transfer Doping Induced Effective Modulation on Ambipolar Characteristics of Few- layer Black Phosphorus” Xiang D, Han C, Wu J, Zhong S, Liu YY, Lin JD, Zhang XA, Hu WP, Özyilmaz B, Castro Neto AH, Wee ATS, Chen Wei*, Nature Communication 6, 6485 (2015)

Biography Dr. CHEN Wei is currently an Associate Professor (2013 - ) in both Chemistry Department and Physics Department at National University of Singapore (NUS). He received his Bachelor’s degree in Chemistry from Nanjing University (China) in 2001, Ph.D. degree from Chemistry Department at NUS in 2004 under the supervision of Prof Loh Kian Ping and Prof Andrew T. S. Wee. His current research interests include Molecular-scale Interface Engineering for Molecular, Organic and 2D Materials-based Electronics, and Interface-Controlled Nanocatalysis for Energy and Environmental Research. He has also published more than 200 papers on high-impact peer-reviewed journals in these topics, including 14 invited review articles, and receiving over 5000 citations with H-index of 39. Dr. Chen is a recipient of the Lee Kuan Yew Research Fellowship (2006), Omicron Nanotechnology Award (2009), Hitachi Research Fellowship (2010), Singapore Young Scientist Award (2012), and NUS Young Scientist Award (2013).

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Low dimensional inorganic solids: regulation of electric behavior and their energy applications

Changzheng Wu 1,* 1 Department of Chemistry, University of Science and Technology of China, No.96, Jinzhai Road, Hefei, 230026 * Corresponding author: [email protected] Low dimensional inorganic solids, including one-dimensional atomic chains and two- dimensional atomic planes, etc. have emerged as an important class of inorganic functional materials system owing to their advantages in precise crystal structure, easy to scale-up applications and versatile chemical regulation way[1]. Summarized herein are our group’s reports on regulation of electric behavior in low dimensional inorganic solids, specifically on tuning the intrinsic physical properties such as electric transport and spin behavior, for the investigation of how intrinsic physical properties influences the performances of energy storage and conversion[1- 7]. In order to sustain fluent “stream” of electron for optimization in electric behavior, we developed novel high electric conductivity in energy solids by combining the concept of “trenching” and “irrigation”: on the one hand, we constructed new electric transport channels through atomic correlation and electronic spin (trenching); on the other hand, we procured new metallic inorganic solids and optimized electric transport behavior in conventional inorganic solids by surface modification to inject extra electron (irrigation). Based on above, we furthermore constructed highly efficient electrocatalyst systems via synergizing intrinsic electric transport and electrochemical activity. In summary, optimized electric-transport properties have provided a solid materials foundation towards applications of low dimensional inorganic solids in superior conducting electrodes, planar spintronics as well as design of highly efficient photoelectrocatalysts.

References 1. Guo, Y.; Xu, K.; Wu, C.; Zhao, J.; Xie, Y. Chem. Soc. Rev. 2015, 44, 637. 2. Peng, J, Guo, Y.Q., Lv H.F., Xinyu Dou, Chen, Q., Zhao, J.Y., Wu, C.Z., Xie, Y. Angew. Chem. Int. Ed. 2016, 55, 3176. 3. Wu, C.; Feng, F.; Xie, Y. Chem. Soc. Rev. 2013, 42, 5157. 4. Guo, Y.; Dai, J.; Zhao, J.; Wu, C.; Li, D.; Zhang, L.; Ning, W.; Tian, M.; Zeng, X. C.; Xie, Y. Phys. Rev. Lett. 2014, 113, 157202. 5. Xu, K., Chen, P., Li, X.L., Tong, Y., Ding, H., Wu, X.J., Chu, W.S., Peng, Z.M., Wu, C.Z., Xie, Y. J. Amer. Chem. Soc. 2015, 137, 4119. 6. Lin, C.; Zhu, X.; Feng, J.; Wu, C.; Hu, S.; Peng, J.; Guo, Y.; Peng, L.; Zhao, J.; Huang, J.; Yang, J.; Xie, Y. J. Amer. Chem. Soc. 2013, 135, 5144. 7. Bi, W.; Li, X.; Zhang, L.; Jin, T.; Zhang, L.; Zhang, Q.; Luo, Y.; Wu, C.; Xie, Y. Nat. Commun. 2015, 6, 8647.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Changzheng Wu obtained his B.S. (2002) and PhD (2007) degrees in the Department of Chemistry, University of Science and Technology of China. He has since worked as a postdoctoral fellow in the Hefei National Laboratory for Physical Sciences at Microscale. He is now a full professor of Department of Chemistry, University of Science and Technology of China. Dr. Wu’s research is highly interdisciplinary. His current research interests focus on regulation of electrical and spin behavior of low-dimensional inorganic solids for energy applications in energy storage or energy conversion. He is/has been supported by National Youth Top-notch Talent Support Program (2015), Fok Ying-Tong Education Foundation (2014) and NSFC Excellent Young Scientist Fellowship (2012) and New Century Excellent Talents in Universities (2010). His major honors are Young scholars of the Yangtze River (2015), Chinese Chemical Society Young Chemist Award (2014), National Prize for Natural Sciences of China (Second Place, 2012) and CAS Lu Jiaxi Youth Talent Award (2012).

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Self-Assembly of Sub-1nm Ultrathin Nanostructures 王训* 清华大学化学系，北京，100084 *Email: [email protected] 纳米结构在特征尺寸接近1纳米时，除自身具有优异的物理化学性质外，非化学键相互作用在其自组装过程中的作用也不可忽视。我们在过去的几年中围绕二维超薄纳米片、超细金属纳米粒子宏观组装体构筑开展了较为系统的研究工作，发展了氧化石墨烯三维组装体构筑方法、发现了金属修饰氧化石墨烯宏观薄膜的选择性溶剂分离效应，以MoS2纳米片为基础获得了高纯度片层组装纳米管等新结构，并对相应性质开展了研究工作。

Fig. 1 Cation-Decorated Graphene Oxide Nano-sheets and Their Efficient Application as Membrane Reactors 关键词：亚纳米；自组装；异质结；单壁纳米管参考文献

1. Huiling Liu, Farhat Nosheen, Xun Wang*. Chem. Soc. Rev. 2015, 44, 3056-3078. 2. Bing Ni, Huiling Liu, Peng-peng Wang, Jie He, Xun Wang*. Nature Commun. 2015, 6, 8756; DOI: 10.1038/ncomms9756. 3. Zhi-cheng Zhang, Xiao-bin Xu, Jing-chao Zhang, Guo-lei Xiang, Biao Xu, Pei-lei He, Farhat Nosheen, Faisal Saleem, Xun Wang*. Angew. Chem. Int. Ed. 2014, 53, 429-433. 4. Peilei He, Biao Xu, Peng-peng Wang, Huiling Liu, Xun Wang*. Adv. Mater. 2014, 26, 4339- 4344 5. Peng-peng Wang, Hongyu Sun, Yongjun Ji, Wenhai Li, Xun Wang*. Adv. Mater. 2014, 26, 964- 969. 6. Shi Hu, Huiling Liu, Pengpeng Wang, Xun Wang*. J. Am. Chem. Soc. 2013, 135, 11115-11124. 7. Yong Long, Kai Wang, Guolei Xiang, Jing Zhuang, Xun Wang*. Cation-Decorated Graphene Oxide Nano-sheets and Their Efficient Application as Membrane Reactors. 2016, in revision.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Prof. & Dr. Xun Wang received his bachelor’s and master’s degree in chemical engineering from Northwest University (Xi`an, China) in 1998 and 2001, respectively. He earned his Ph.D. degree in chemistry from Tsinghua University in 2004. Then he joined the faculty of Department of Chemistry at Tsinghua University as an assistant professor in 2004. He was promoted to the rank of associate professor in 2005 and full professor in 2007. His main awards include Fellow of the Royal Society of Chemistry (2015), ChangJiang Professor (Ministry of Education, China, 2014), 2009 Science and Technology Award for Chinese Youth (2009), National Fund for Outstanding Young Scientists (2007), Fok Ying Tung Education Foundation (2007), Chinese Chemical Society Prize for Young Scientists (2006), National Excellent Doctoral Dissertation of P. R. China (2006) and IUPAC Prize for Young Chemists (2005). His current research interests include synthetic methodology and formation mechanism of inorganic nanocrystals. He is also interested in self-assembly of nanocrystals and function-property relationship in inorganic nanocrystals. He has published more than 180 research papers on international journals, including Nature, Nature Commun., J. Am. Chem. Soc., Angew. Chem. Int. Ed., Adv. Mater., etc. with a total citation of more than 13000 times.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Molecular Analogs of MoS2 Edges for Superior Hydrogen-Evolution Electrocatalysis

Zhongjie Huang, 1 Benjamin Garrett, 1 Yiying Wu 1* 1 Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio, 43210, United States * Corresponding author: [email protected]

Proton reduction is one of the most fundamental and important reactions in nature.

MoS2 edges have been identified as the active sites for hydrogen evolution reaction (HER) electrocatalysis. Designing molecular mimics of MoS2 edge sites is an attractive strategy to understand the underlying catalytic mechanism of different edge sites and improve their activities. Herein I will discuss our recent progress in this aspect. The first example 2- is a dimeric molecular analog [Mo2S12] , as the smallest unit possessing both the terminal 1 2- and bridging disulfide ligands. Our electrochemical tests show that [Mo2S12] is a superior heterogeneous HER catalyst under acidic conditions. Computations suggest that 2- the bridging disulfide ligand of [Mo2S12] exhibits a hydrogen adsorption free energy near zero (-0.05 eV). The second example is a group of compounds with the general 2 formular of MoO(S2)2bpy. By varying substitution on the bpy ligand, we demonstrate the induction effect on the S—S ligand, thereby tuning the rate constants for HER and overpotentials. We have studied homogenous electrocatalytic hydrogen production performance metrics of three catalysts with different bipyridine substitutions. By varying the electron-donating abilities, we present the first demonstration of using the ligand to tune catalytic properties of the S—S bond in molecular MoS2 edge site mimics. These works can shed light on the relationship between structure and electrocatalytic activity of molecular MoS2 catalysts and thus is of broad importance from catalytic hydrogen production to biological enzyme functions.

References 1 Huang, Z. J., Luo, W. J., Ma, L., Yu, M. Z., Ren, X. D., He, M. F., Polen, S., Click, K., Garrett, B., Lu, J., Amine, K., Hadad, C., Chen, W. L., Asthagiri, A. & Wu, Y. Y. Dimeric [Mo2S12](2-) Cluster: A Molecular Analogue of MoS2 Edges for Superior Hydrogen-Evolution Electrocatalysis. Angew Chem Int Edit 54, 15181-15185 (2015). 2 Garrett, B. R., Polen, S. M., Click, K. A., He, M., Huang, Z., Hadad, C. M. & Wu, Y. Tunable Molecular MoS2 Edge-Site Mimics for Catalytic Hydrogen Production. Inorg Chem in press (2016).

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Yiying Wu received his B.S. in chemical physics from the University of Science and Technology of China in 1998, and his Ph.D. in chemistry from the University of California at Berkeley in 2003 with Prof. Peidong Yang. He then did his postdoctoral research with Prof. Galen D. Stucky at the University of California, Santa Barbara, and joined the chemistry faculty at The Ohio State University in the summer of 2005. He was promoted to associate professor with tenure in 2011 and to full professor in 2014. He has been serving as an associate editor for ACS Applied Materials and Interfaces since 2013. His group focuses on materials chemistry for energy conversion and storage. He is the inventor of the one-electron K-O2 battery and pioneered solar batteries that integrate solar harvesting with energy storage. He received Cottrell Scholar Award in 2008, NSF CAREER Award in 2010, CAPA Biomatik Distinguished Faculty Award in 2014, and Midwest Energy News “40 under 40” in 2015.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

N-doped Hierarchical Porous Carbon Supported Metal Nanoparticles as an efficient catalyst for Selective Hydrogenation of Aromatics

Tang minghui, Deng Jiang, Wang Yong* Department of Chemistry, Zhejiang University * Corresponding author: [email protected] Inspired by leavening bread, we design a strategy to fabricate nitrogen doped hierarchically porous carbons (NHPC) with three-dimensional (3D) hierarchical pores consisting of macro, meso, and micropores. The “leavening method” is conducted simply by mixing the biomass with

KHCO3 and (NH4)2C2O4 followed by undergoing elevated temperature treatment. Metal nanoparticles (about 2 nm) uniformly dispersed on NHPCs were then developed and served as a highly active and stable catalyst for the selective hydrogenation of aromatics under mild conditions. For example, the resulting Ru/NHPC catalyst exhibited a substantially enhanced activity in the selective hydrogenation of toluene (TOF up to 18497 h-1) and quinoline (TOF up to 668 h-1) in comparison with the Ru/HPC (3D-hierarchical porous carbon without nitrogen doped) and Ru/AC (commercial actived carbon) under the same reaction conditions. Further investigations indicate that the 3D interconnected porous structure and N-doping contribute to the improved catalytic performance. This work provides great potential for the application of supported catalysts based on the NHPC material in fine-chemical production with high activity. References 1. Tang, M. H.; Mao, S. J.; Li, M. M.; Wei, Z. Z.; Xu, F.; Li, H. R.; Wang, Y. ACS Catal. 2015, 5, 3100-3107. 2. Deng, J.; Xiong, T. Y.; Xu, F.; Li, M. M.; Han, C. L.; Gong, Y. T.; Wang, H. Y.; Wang, Y. Green Chem. 2015, 7, 4053-4060. Biography Wang Yong received his BS degree from Xiangtan University and his PhD degree from Zhejiang University. After a postdoctoral stay at the Department of Chemistry, Zhejiang University, he joined the Max Planck Institute for Colloids and Interfaces in Potsdam/Germany in 2009. He rejoined Zhejiang University and became a Professor for Chemistry in 2011. Professor Wang’s research group, advanced materials and catalysis group (AMCG), has been focusing its efforts on the basic science and applied research for the design and development of heterogeneous catalysis, energy storage, and energy conversion carbon based materials. They strive to pursue green energy technologies and the beautiful fundamental science that make these technologies a reality. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Distinguishing Faceted Oxide Nanocrystals with 17O Solid-State NMR Spectroscopy

Luming Peng Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China Email: [email protected]

Inorganic oxide nanocrystals with tailored facets show distinct physical properties and have potential applications in catalysis, gas sensing, laser emission and energy storage owing to their specific surface structure. It is crucial to distinguish and identify faceted nanosized oxides in order to develop structure-property relationships and rationally design nanostructures with desired properties. Although electron microscopy techniques have been powerful to visualize the surface of oxide nanocrystals1, these methods are only able to analyze a very limited sample volume. Here we develop a convenient 17O NMR strategy based on selective surface isotopic labelling2 to distinguish oxide nanocrystals exposing different facets. In combination with DFT calculations, we show that the oxygen ions on the {001} and {101} surfaces of anatase titania nanocrystals are associated with distinct 17O chemical shifts. Furthermore, the NMR data show the nature of water adsorption (molecular vs. dissociative) on these facets and their surface structural details such as surface reconstruction and step edge defects. The results presented here open up methods for characterizing faceted nanocrystalline oxides and related materials.

References [1] Begtrup et al., Phys. Rev. B 2009, 79, 205409. [2] Wang et al., Sci. Adv. 2015, 1, e1400133.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Luming Peng was born in Nanjing, China. He received his B.S. in chemistry from Nanjing University in 2001, and Ph.D. from State University of New York at Stony Brook in 2006, working under the guidance of Professor Clare P. Grey on the structure and properties of acidic catalysts. He did postdoctoral studies on the structure of glassy materials with Professor Jonathan F. Stebbins at Stanford University during 2006–2008. He became an associate professor in the School of Chemistry and Chemical Engineering at Nanjing University in August 2008 and has been promoted to a full professor in 2014. His research interests lie in applying various state-of-the-art solid-state NMR techniques to solve tough problems in materials chemistry where other techniques have failed. He is currently working on developing new characterization methods for functional materials including nanocrystals, layered double hydroxides and energy storage materials. He has published more than 70 research papers on international journals, including Nature Materials, Science Advances, J. Am. Chem. Soc., Adv. Funct. Mater., etc. He has been supported with National Science Fund for Excellent Young Scholars of China (2012) and New Century Excellent Talents in University (2011).

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Low Temperature Aqueous-phase Fischer-Tropsch Synthesis Reaction over Ru catalyst with ultra-high density of active sites

Ding Ma Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China Email: [email protected]

Fischer-Tropsch synthesis (FTS), which converts fossil fuel-based syngas (a mixture of CO and H2) to liquid fuel products over Ru, Co or Fe catalysts, was used by South Africa to circumvent oil embargos during WWII. Since it is now possible to use diverse resources such as coal, biomass and shale gas as the source for the production of syngas, FTS is once again of essential economic interest with the surging consumption of fossil fuels. As the FTS is highly exothermic (ΔHm = -170 kJ∙mol-1) and thermodynamically favored at low temperature, it is desirable to develop new catalyst system that could be working at low reaction temperature. Aqueous-phase F-T synthesis over Ru nanoparticle (NP) catalysts shows higher activity compared to the traditional heterogeneous process. Furthermore, the synthesis can be realized at relatively low temperature (423 K), which shows the great potential of a liquid-phase reaction.

In this report we summarized recent advances in aqueous-phase Fischer-Tropsch synthesis reaction. Indeed, conventional FTS catalysts such as Ru, Fe, and Co all could be used in the aqueous-phase FTS reaction. Ru catalyst is the most active catalyst at low temperature, while Fe and Co has the relatively low reactivity. In this work, beside summarizing/compare the reaction behavior of Ru, Fe, and Co catalysts for aqueous-phase FTS reaction, we will focus on the new Pt-Co and Pt-Ru bimetallic nanoparticle catalysts that could work at low reaction temperature.

References 1. C. X. Xiao, Z. P. Cai, T. Wang, Y. Kou, N. Yan, Angew. Chem. Int. Ed., 47 (2008)746. 2. C. Wang, H. B. Zhao, H. Wang, L. T. Liu, C. X. Xiao, D. Ma, Catal. Today, 183(2012)143. 3. L. T. Liu, G. Sun, C. Wang, J. H. Yang, C. X. Xiao, H. Wang, D. Ma, Y. Kou, Catal. Today, 183(2012)136. 4. X. Y. Quek, R. Pestman, R. A. van Santen, E. J. M. Hensen, Catal. Sci. Technol., 4 (2014)3510 . 5. H. Wang, W. Zhou, J. X. Liu, R. Si, G. Sun, M. Q. Zhong, H. Y. Su, H. B. Zhao, J. A. Rodriguez, S. J. Pennycook, J. C. Idrobo, W. X. Li, Y. Kou, D. Ma, J. Am. Chem. Soc., 135,(2013)4149 .

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Multiple Functions of Pt Nanocrystals in Photocatalysis

Yugang Sun 1,* 1 Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19022, USA * Corresponding author: [email protected]

Platinum (Pt) nanocrystals are usually used in chemical reactions because of their excellent catalytic performance, for example, photocatalytic water splitting of water. In a typical design, Pt nanocrystals can accept photo-excited electrons from light absorbers such as semiconductor quantum dots (QDs) to catalyze hydrogen evolution reaction (HER). Charge transfer from QDs to Pt nanocrystals is very inefficient and mediate molecules (e.g., methylviologen) are necessary to facilitate the charge transfer [1]. In this presentation, a binary superparticles made of Pt nanocrystals and AgCl nanocrystals will be discussed as a new class of Pt-based nanostructures that can directly accept photoexcited electrons from QDs without assistance of mediate molecules to efficiently catalyze HER with internal quantum yield of 8.6%. In addition to receiving electrons from semiconductor QDs, Pt nanocrystal can also absorb visible light to generate energetic electrons, which can inject to conduction band of a semiconductor to drive chemical reactions including HER. Depositing Pt nanocrystals on spherical SiO2 particles can significantly enhance visible absorption coefficient of the Pt nanocrystals due to the unique scattering modes near the SiO2 particles. In SiO2@Pt nanocrystals@TiO2 core-shell nanostructures, the enhancement in visible absorption enables the efficient generation of energetic electrons in photoexcited Pt nanocrystals, which can easily transfer to the TiO2 surface layer to drive HER and many other chemical reactions [2].

References 1. Zhu, H.; Song, N.; Lv, H.; Hill, C. L.; Lian, T. J. Am. Chem. Soc. 2012, 134, 11701- 11708. 2. Zhang, N.; Han, C.; Xu, Y.-J.; Foley, J. J., IV; Zhang, D.; Codrington, J.; Gray, S. K.; Sun, Y. Nature Photonics 2016, DOI: 10.1038/nphoton.2016.76

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Dr. Yugang Sun obtained his B.S and Ph.D degree from University of Science and Technology of China (USTC) in 1996 and 2001, respectively. He then worked as a postdoctoral fellow with Prof. Younan Xia at University of Washington and Prof. John A. Rogers at University of Illinois at Urbana-Champaign. In 2006, Dr. Sun joined the Center for Nanoscale Materials at Argonne National Laboratory (ANL) to start his independent research career. He moved to Chemistry Department of Temple University in January 2016. He received the Presidential Early Career Award for Scientists and Engineers (PECASE) in 2007 and DOE’s Office of Science Early Career Scientist and Engineering Award in 2008. His work has significant impact the field of nanomaterials and he was listed in the top 100 chemists (#62) and top 100 Materials scientists (#5) analyzed by Thomson Reuters in 2011. He was again selected as a highly cited researcher in 2014 (Chemistry and Materials Science) and in 2014 (Materials Science). His research is centered in the design/synthesis of hybrid nanostructures as well as investigation of novel properties of the synthesized nanostructures in the context of nanophotonics, photocatalysis, sensing, and energy storage/conversion.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Metal-catalyzed reactions under 2D layered material covers

Qiang Fu, Xinhe Bao Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P.R. China * Corresponding author: [email protected]

Active sites have been the main research theme in catalysis. Recently, it has been recognized that the equally important factor in catalysis is the micro-environment surrounding the active sites. Two-dimensional (2D) nanospace between 2D atomic crystals and solid surfaces can be regarded as a 2D nanoreactor, and placing a 2D cover onto the active surface forms a confined microenvironment on the active sites and enhance the catalytic performance. We demonstrate molecule adsorption and reactions under graphene and h-BN overlayers. A strong confinement effect of the 2D cover on the surface chemistry and catalytic reactions has been revealed. Accordingly, a concept “catalysis under cover” has been suggested.

References 1. Deng, D.H.; Novoselov, K.; Fu, Q.; Zheng, N.F.; Tian, Z.Q.; Bao, X.H. Nat. Nanotech. 2016, 11, 218 2. Gao, L.J.; Fu, Q.; Li, J.M.; Qu, Z.P.; Bao, X.H. Carbon, 2016, 101, 324 3. Yang, Y.; Fu, Q.; Li, H.; Wei , M.M.; Xiao, J.P.; Wei, W.; Bao, X.H. ACS Nano 2015, 9, 11589 4. Zhang, Y.H.; Weng, X.F.; Li, H.; Li, H.; Wei, M.M.; Xiao, J. P.; Liu, Z.; Chen, M.S.; Fu, Q.; Bao, X.H. Nano Lett. 2015, 15, 3616 5. Yao, Y.; Fu, Q.; Zhang, Y.Y.; Weng, X.F.; Li, H.; Chen, M.S.; Jin, L.; Dong, A.Y.; Mu, R.T.; Jiang, P.; Liu, L.; Bluhm, H.; Liu, Z.; Zhang, S.B.; Bao, X.H. PNAS, 2014, 111, 17023

Biography Dr. Qiang Fu obtained his PhD degree from Beijing Institute of Technology in 2000. After that he moved to Max Planck Institute for Metal Research and Fritz Haber Institute for postdoc research. In 2005, he joined Dalian Institute of Chemical Physics supported by CAS “100 Talents Program”. His main research direction is the surface and interface catalysis. In the past five years he has published papers in Science (2), Nat Nanotech (1), PNAS (1), Nat Commun (2), Acc Chem Res (1), JACS (2), Angew Chem (1), and Nano Lett (1). He acts as an associate editor of Applied Surface Science and board members of Nano Research and Acta Physico-Chimica Sinica. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Atomic Layer Deposition for Advanced Catalyst “bottom-up” Synthesis

Junling Lu* Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China * Corresponding author: [email protected]

Catalyst synthesis with precise control over the structure of catalytic active sites at the atomic level is of essential importance for the scientific understanding of reaction mechanisms and for rational design of advanced catalysts with high performance. Such precise control is achievable using atomic layer deposition (ALD). ALD is similar to chemical vapor deposition (CVD), except that the deposition is split into a sequence of two self-limiting surface reactions between gaseous precursor molecules and a substrate. The unique self-limiting feature of ALD allows conformal deposition of catalytic materials on a high surface area catalyst support at the atomic level. The deposited catalytic materials can be precisely constructed on the support by varying the number and type of ALD cycles. As an alternative to the wet-chemistry based conventional methods, ALD provides a cycle-by-cycle “bottom-up” approach for nanostructuring supported catalysts with near atomic precision [1, 2]. In this presentation, the capability of achieving precise control over the particle size of monometallic nanoparticles by ALD is emphasized. The possibility of the preparation of single-atom metal catalysts by ALD at elevated temperatures will be discussed [3]. For supported bimetallic catalyst synthesis, I will show the challenges of combing two metal ALD processes to form bimetallic nanoparticles synthesis. Then our recent the strategy developed for selective metal-on-metal ALD for precise synthesis of supported bimetallic catalysts while excluding monometallic formation are particularly highlighted [4, 5]. In the final part of my presentation, I will focus on oxide ALD on metals for precise synthesis of nanostructured metal catalysts, therein, I will discuss the methods of tailoring the catalytic performance of metal catalysts including activity, selectivity and stability, through selective blocking of the low-coordination sites of metal nanoparticles, the confinement effect, and the formation of new metal-oxide interfaces [6, 7].

References (1) J.L. Lu, J.W. Elam, P.C. Stair, Acc. Chem. Res. 46 (2013) 1806-1815. (2) J.L. Lu, J.W. Elam, P.C. Stair, Surf. Sci. Rep. 2016, doi:10.1016/j.surfrep.2016.1003.1003. (3) H. Yan, H. Cheng, H. Yi, Y. Lin, T. Yao, C.L. Wang, J.J. Li, S.Q. Wei, J.L. Lu, J. Am. Chem. Soc. 2015, 137, 10484-10487 (4) J.L. Lu, K.B. Low, Y. Lei, J.A. Libera, A. Nicholls, P.C. Stair, J.W. Elam, Nat. Commun. 2014, 5 3264. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

(5) H.W. Wang, C.L. Wang, H. Yan, H. Yi, J.L. Lu, J. Catal. 2015, 324, 59-68. (6) J.L. Lu, B. Fu, M.C. Kung, G. Xiao, J.W. Elam, H.H. Kung, P.C. Stair, Science 2012, 335, 1205. (7) H. Yi, H.Y. Du, Y.L. Hu, H. Yan, H.-L. Jiang, J.L. Lu, ACS Catal. 2015, 5, 2735-2739.

Biography Junling Lu. Professor at Department of Chemical Physics, University of Science and Technology of China. He received his Ph.D degree from Institute of Physics, Chinese Academy of Sciences in 2007, under the supervision of Prof. Hong-Jun Gao. He was an exchange-student at Fritz-Haber Institute, Fitz-Haber-Institut der Max-Planck-Gesellschaft, under Prof. Hans-Joachim Freund between August 2004 and August 2006. After graduation, he spent three years in Prof. Peter C. Stair group as a postdoctoral fellow at Northwestern University, focusing on design and synthesis of advanced catalysts with ALD. In July 2010, He joined in Dr. Jeffrey W. Elam group as a postdoctoral fellow at Argonne National Laboratory, continuing the research in the application of ALD in catalysis. In March 2013, he became a professor at department of chemical physics, University of Science and Technology of China. His current research interest is in atomically-precise design of new catalytic materials using a combined wet-chemistry and ALD method. His goal is to understand the structure-reactivity relations that lead to advances in industrial chemistry and energy technology. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Interfacial Control of Self-assembled Nanoparticles and their Applications Chenguang Lu*, Zhiyong Tang*

National Center for Nanoscience and Technology CAS key laboratory of Nanosystem and Hierarchical Fabrication Zhongguancun Beiyitiao #11, Beijing, 100190 * Corresponding author: [email protected]; [email protected] Self assembled nanoparticle represents a new class of materials for applications. Study on its formation mechanism, interfacial controls, and properties would lead to insight into this material for potential applications. In this report, Lead salt nanoparticles assembly are studied, with emphasis on the interfacial control between individual nanoparticles, The coupling between nanoparticles are enhanced with chemical modifications of nanoparticle surface, including ligand exchange with graphene derivatives and controlled fusing up of neighboring nanoparticles. Electronic properties of the nanoparticle assemblies are explored. High thermoelectric performance is achieved for nanoparticle assemblies and the origin of the enhanced performance is discussed.

References 1) Zhao, M.; Yang, F.; Liang, C.; Wang, D.W.; Ding D.F.; Lv, J.W.; Zhang, J.Q; Hu, W.P.; Lu, C.G.*; Tang, Z.Y.*, High Hole Mobility in Long-Range Ordered Two-Dimensional Lead Sulfide Nanocrystal Monolayer Films. Adv. Funct. Mater., Accepted 2) Lu, C. G.*; Tang Z. Y.*; Advanced Inorganic Nanoarchitectures from Oriented Self- Assembly. Adv. Mater., 2015, DOI: 10.1002/adma.201502869 3) Liang, Y.; Lu, C. G. *; Ding, D; Zhao, M.; Wang, D.; Hu, C.; Qiu, J. S.; Xie, G.;* Tang Z. Y.*; Capping Nanoparticles with Graphene Quantum Dots for Enhanced Thermoelectric Performance. Chem. Sci., 2015, 6, 4103 Biography 1. Education and Personal Information Ph. D., Chemistry, Duke University, Durham, NC, 12/2006; Advisor: Prof. Jie Liu B. S., Chemistry (Organic), Peking University, Beijing, P.R.China, 07/1999

2. Research Experience  Associate professor, National Center For Nanoscience and Technology, 2013‐now  Associate Research Scientist, Columbia University, 2009‐2013  Post-doctoral Researcher, Columbia University, 2006- 2009 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Leveraging Physiology for Precision Drug Delivery

Zhen Gu1,2,*

1Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University

2Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill

3Department of Medicine, University of North Carolina School of Medicine * Corresponding author: [email protected]

Spurred by recent advances in materials chemistry, molecular pharmaceutics and nanobiotechnology, stimuli-responsive “smart” systems offer opportunities for precisely delivering drugs in dose-, spatial- and temporal-controlled manners. In this talk, I will discuss our ongoing efforts in using physiological signals, such as blood sugar level, enzyme activity and ATP gradient for on-demand drug delivery in a programmed manner. I will first present the glucose-responsive synthetic systems for biomimetic delivery of insulin for diabetes treatment. I will further discuss programmable delivery of anticancer therapeutics, the release of which can be activated in the tumor microenvironment or subcellular environment.

Biography Dr. Zhen Gu received his B.S. degree in Chemistry and M.S. degrees in Polymer Chemistry and Physics from Nanjing University. In 2010, he obtained Ph.D. degree at the University of California, Los Angeles, under the guidance of Prof. Yi Tang in the Department of Chemical and Biomolecular Engineering. He was a postdoctoral associate working with Prof. Robert Langer at MIT and Harvard Medical School during 2010 to 2012. He is currently an Associate Professor in the Joint Department of Biomedical Engineering at the University of North Carolina at Chapel Hill and North Carolina State University. He also holds joint positions in the Molecular Pharmaceutics Division in the Eshelman School of Pharmacy and Endocrinology and Metabolism Division in the Department of Medicine. His group studies controlled drug delivery, bio-inspired materials and nanobiotechnology, especially for cancer and diabetes treatment. He is the recipient of the Sloan Research Fellowship (2016), Pathway Award (2015) and Junior Faculty Award (2014) of the American Diabetes Association (ADA), Young Innovator Award in Cellular and Molecular Engineering of the Biomedical Engineering Society (BMES, 2015) and the Sigma Xi Young Faculty Research Award (2014). MIT Technology Review listed him in 2015 as one of the global top innovators under the age of 35 (TR35). 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Engineering Biointerface with Controlled Cell Adhesion towards Cancer Diagnostics Shutao Wang * Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190,P.R. China * Corresponding author: [email protected] Circulating tumor cells (CTCs) have become an emerging “biomarker” for monitoring cancer metastasis and prognosis. Although there are existing technologies available for isolating/counting CTCs, the most common of which using immunomagnetic beads, they are limited by their low capture efficiencies and low specificities. By introducing a three-dimensional (3D) nanostructured substrate – specifically, a silicon-nanowire (SiNW) array coated with anti- EpCAM – we can capture CTCs with much higher efficiency and specificity. The conventional methods of isolating CTCs depend on biomolecular recognitions, such as antigen-antibody interaction. Unlikely, we here proposed that nanoscaled local topographic interactions besides biomolecular recognitions inspired by natural immuno-recognizing system. This cooperative effect of physical and chemical issues between CTCs and substrate leads to increased binding of CTCs, which significantly enhance capture efficiency. Recently, we have developed a 3D cell capture/release system triggered by enzyme, electrical potential and temperature as well as magnetic field, which is effective and of “free damage" to capture and release cancer cells. In addition, immune cells have also been employed as living template for greatly improving the limitation of traditional immunomagnetic beads. Furthermore, the potential pollution from biochip waste can be successfully disposed by employing self-cleaning substrates. Therefore, these bio-inspired interfaces open up a light from cell-based disease diagnostics to subsequent safety treatment of biomedical waste. References 1. Liu X. L.; Wang S. T. Chem. Soc. Rev. 2014, 43, 2385-2401. 2. Huang C.; Yang G.; Ha Q.; Meng J. X; Wang S. T. Adv. Mater. 2015, 27, 310-313. 3. Li Y. Y.; Lu Q. H.; Liu H. L.; Wang J. F.; Zhang P. C.; Liang H. G.; Jiang L.; Wang S. T. Adv. Mater. 2015, 27, 6848‐6854. 4. Zhang F. L; Jiang Y.; Liu X. L.; Meng J. X.; Zhang P. C.; Liu H. L.; Yang G.; Li G. N.; Jiang L.; Wan L. J.; Hu J. S.; Wang S. T. Nano Lett. 2016, 16, 766-772. Biography Shutao Wang is currently a full professor at Technical Institute of Physics and Chemistry, Chinese Academy of Sciences. He is awarded by National Science Fund for Distinguished Young Scholars (2014) and the Top-Notch Young Talents Program of China. He is an associate editor of NPG Asia Materials and Host of a Feodor Lynen Research Fellow. His research interests include the design and synthesis of bioinspired interfacial materials with special adhesion and their applications at the nano-biointerface. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Lipid Hybrid Nanomaterials for Drug Delivery

Juewen Liu 1,* 1 Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada * Corresponding author: [email protected]

Hybrid materials containing an inorganic nanoparticle and a lipid bilayer are a versatile platform for developing drug delivery vehicles. We are interested in understanding both fundamental interactions and their biomedical applications. Zwitterionic phosphocholine (PC) lipids are the main constituent of the mammalian cell membrane. PC bilayers are known for its anti-fouling property, yet it is adsorbed by all tested inorganic nanoparticles. My lab has found that different materials interact with PC liposomes differently. PC liposomes adsorb on SiO2 followed by membrane fusion with the surface forming supported lipid bilayers. TiO2 and other metal oxides only adsorb intact PC liposomes via the lipid phosphate bonding [1]. Citrate-capped AuNPs are adsorbed very strongly via van der Waals force, inducing a local gelation [2]. The consequence is a transient liposome leakage upon AuNP adsorption or desorption. All the carbon- based nanomaterials (graphene oxides, carbon nanotubes and nanodiamond) are adsorbed mainly via hydrogen bonding [3, 4]. The oxidation level of graphene oxide strongly influences the outcome of the final hybrid material. This modular hybrid material is very versatile in drug loading. The lipid bilayer can be used for grafting targeting ligands. Compared to conjugation of ligands on a solid surface, the fluid lipid membrane is very attractive since it allows for dynamic ligand reorganization to achieve optimal multivalent binding. These inorganic/lipid hybrid materials have been used for controlled release, and targeted drug delivery both in the cell culture and in animal models for treating diseases like cancer and chronic pain [5, 6].

References 1. F. Wang; J. Liu, J. Am. Chem. Soc. 137 (2015) 11736. 2. F. Wang; J. Liu, Nanoscale 7 (2015) 15599. 3. F. Wang; B. Liu; A. C. F. Ip; J. Liu, Adv. Mater. 25 (2013) 4087. 4. A. C. F. Ip; B. Liu; P.-J. J. Huang; J. Liu, Small 9 (2013) 1030. 5. C. E. Ashley; E. C. Carnes; G. K. Phillips; D. Padilla; P. N. Durfee; P. A. Brown; T. N. Hanna; J. Liu; B. Phillips; M. B. Carter; N. J. Carroll; X. Jiang; D. R. Dunphy; C. L. Willman; D. N. Petsev; D. G. Evans; A. N. Parikh; B. Chackerian; W. Wharton; D. S. Peabody; C. J. Brinker, Nat. Mater. 10 (2011) 389. 6. E. C. Dengler; J. Liu; A. Kerwin; S. Torres; C. M. Olcott; B. N. Bowman; L. Armijo; K. Gentry; J. Wilkerson; J. Wallace; X. Jiang; E. C. Carnes; C. J. Brinker; E. D. Milligan, J. Control. Release 168 (2013) 209. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Juewen Liu received his BSc from the University of Science and Technology of China in 2000, and PhD in Chemistry from the University of Illinois at Urbana-Champaign in 2005. After postdoctoral research at the University of New Mexico and Sandia National Laboratories, he joined the Department of Chemistry of University of Waterloo in Canada in 2009. Now he is an Associate Professor there. He is interested in the adsorption of biomolecules such as DNA and lipids by nanomaterials both for fundamental understandings and for analytical and biomedical applications. His group also develops DNA-based biosensors for environmental and biomedical analysis. He received an Early Researcher Award from the Ontario Ministry of Research and Innovation (2011) and the Fred Beamish Award from the Canadian Society for Chemistry (2014). He has authored over 150 papers, receiving nearly ten thousand citations.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Renal Clearable Nanoprobes for Biomedical Imagingy’s Jie Zheng 1,2,*

1 Department of Chemistry, The University of Texas at Dallas, Richardson, TX, 75080, 2 Department of Urology, The University of Texas Southwestern Medical Center, Dallas, TX, 75390

Corresponding author: *[email protected]

While nanoprobes with strong signal output and multifunctionalities open up unprecedented opportunities for developing novel biomedical technologies for imaging and therapy, translation of nanoprobes into clinical practices has been hampered by the potential toxicity resulted from their long-term nonspecific accumulation in healthy tissues (1). On the other hand, small molecular probes that are being widely used in cancer diagnosis are often renal clearable but fail to integrate multiple imaging techniques for better health management (1). In the past decade, We used glutathione to stabilize 2~3nm gold nanoparticles(GS-AuNPs), which can give different colored luminescence (2-4). These GS-AuNPs have little interactions with serum proteins, can be cleared from the body through kidneys with an efficiency of 10~100 times better than the same sized AuNPs (5) and exhibit unique molecular-like pharmacokinetics (6). More recently, we found that they can passively target the MCF-7 breast cancer through enhanced permeability and retention (EPR) effect (7,8). By further modifying the surface chemistry, we found that these AuNPs can be successfully tuned to avidly target tumor acidic microenvironment (9). Not limited to cancer imaging, GS-AuNPs can also serve as contrast agents to noninvasively report kidney dysfunctional stages (10, 11) and sense local pH in a ratiometric way (12). With unique strengths, molecular nanoprobes holds great promise to catalyze the shift of our current medical paradigm to early diagnosis and prevention.

References (1) Yu, M.Y., and Zheng , J., ACS Nano, 2015, 9, 6655 (2) Zheng, J., Nicovich, P.R., Dickson, R.M., Annu. Rev. Phys. Chem., 58, 409 (2007), (3) Zhou, C., Sun, C., Yu, M.Y., Qin, Y., Wang, J., Kim, M., and Zheng, J. J. Phys. Chem. C., 114, 7727 (2010). (4) Zheng, J.; Zhou, C.; Yu, M.; Liu, J.; Nanoscale, 4, 4073 (2012) (5) Zhou, C.; Long, M.; Qin, Y.; Sun, X.; Zheng, J.; Angew. Chem. Int. Ed., 50, 3168 (2011) (6) Zhou, C.; Hao, G.; Patrick, T.; Liu, J.; Yu, M.; Sun, S.; Oz, O.; Sun, X.; Zheng, J.; Angew. Chem. Int. Ed., 51, 10118 (2012) (7) Liu, J.; Yu, M.; Zhou, C.; Yang, S.; Ning, X.; Zheng, J.; J. Am. Chem. Soc., 135,4978 (2013) (8) Liu, J.; Yu, M.; Ning, X.; Zhou, C.; Yang, S.Y.; and Zheng, J.; Angew. Chem. Int. Ed., 12572 (9) Yu, M.; Zhou, C.; Liu, J.; Hankins, J. D.; Zheng, J.; J. Am. Chem. Soc., 133,11014 (2011) (10) Yu, M.X., Liu, J.B., Ning, X.H., Zheng, J., Angew. Chem. Int. Ed., 54,15654 (2015) 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

(11) M. X. Yu, J. C. Zhou, B. J. Du, X. H. Ning, C. Authement, L. Gandee, P. Kapur, J. T. Hsieh, J. Zheng. Angew. Chem. Int. Ed., 55, 2787, 2016 (12) Sun, S.S., Ning X. H., Zhang, G., Wang, Y, Peng, C. Q. and Zheng, J. , Angew. Chem. Int. Ed., 55, 2421, 2016

Biography Jie Zheng is an associate professor of Chemistry at The University of Texas at Dallas and an adjunct associate professor in the department of Urology at UTSW Medical Center. He has been working on luminescence properties of noble metal nanoparticles for more than 15 years and discovered some important principles that governed photoluminescence mechanisms from noble metal nanoparticles with different sizes, surface chemistries and crystallinities. Since 2008, his research has been mainly focused on how to apply luminescent noble metal nanoparticles as imaging probes to fundamentally understand clearance pathways of nanomaterials and developed a class of renal clearable metal nanoparticles that have high tumor targeting efficiencies but low nonspecific accumulation in the normal tissues. In the recent years, his group continues exploring potential biomedical applications of renal clearable nanoparticles beyond cancer detection and has developed a fluorescence kidney functional imaging technique that allows noninvasive imaging and staging of kidney dysfunction at low cost and high sensitivity.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Protein Activity Regulation: Inhibition by Closed-loop Aptamer-based Structures and Restoration by Near-IR Stimulation

Yanbing Yang, Jie Wang, Quan Yuan* College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China * Corresponding author: [email protected]

Regulation of protein activity is vital for understanding the molecular mechanism of biological activities.[1,2] The major focus in protein activity regulation is improvement of the binding affinity of the compound to the protein and developing novel methods for reversible protein activity regulation.[3,4] In this work, protein activity is suppressed by proximity-dependent surface hybridization and subsequently restored by near-infrared (NIR) light stimulation.[5] Specifically, by constructing closed-loop structures with two aptamer-based affinity ligands, significantly enhanced inhibition of thrombin activity is achieved compared to traditional single affinity ligand based inhibitors. Furthermore, the activity of inhibited thrombin is efficiently recovered under NIR light stimulation by using gold nanorods (AuNRs) as photothermal agents to disrupt the closed-loop structures. Real-time and in-situ monitoring of the conversion of fibrinogen into fibrin catalyzed by both inhibited and recovered thrombin was performed with light scattering spectroscopy and laser scanning confocal microscopy (LSCM). Thrombin trapped in the closed- loop structures shows slow reaction kinetics, while the photothermally liberated thrombin displays largely recovered catalytic activity. Human plasma was further employed to demonstrate that both the inhibited and restored thrombin can be applied to clotting reaction in reality. This strategy provides protein activity regulation for studying the molecular basis of biological activities and can be further applied to potential areas such as metabolic pathway regulation and the development of protein-inhibitor pharmaceuticals.

References 1. Wells, J. A.; McClendon, C. L. Nature 2007, 450, 1001-1009. 2. Tzeng, S.-R.; Kalodimos, C. G. Nature 2012, 488, 236-240. 3. Lawrence, D. S. Curr. Opin. Chem. Biol. 2005, 9, 570-575. 4. Wenck, K.; Koch, S.; Renner, C.; Sun, W.; Schrader, T. J. Am. Chem. Soc. 2007, 129, 16015- 16019. 5. Wang, J.; Wei Y. R.; Hu, X. X.; Fang, Y. Y.; Li, X. Y.; Liu, J.; Wang, S. F.; Yuan, Q. J. Am. Chem. Soc. 2015, 137, 10576-10584. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Quan Yuan is currently a full Professor in College of Chemistry and Molecular Sciences at Wuhan University. She received her B.S. (2004) from Wuhan University and Ph.D. (2009) from Peking University. Later she performed postdoctoral research (2009-2012) at University of Florida. Her research interests are controlled synthesis of functional nanomaterials and investigating their corresponding biomedical applications. Up till now, Prof. Yuan has won the National Top 100 Doctoral Thesis (2011), Excellent Young Scientist Foundation of NSFC (2014), Youth Top-notch Talents in Organization Department of the Central Committee of China (2014), Chinese Chemistry Society Young Chemist Award (2015) and Young Cheung Kong Scholars Program (2015). Currently she has published 46 high quality papers on journals like Proc. Natl. Acad. Sci., J. Am. Chem. Soc., and Angew. Chem. Int. Ed. et al. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Single Molecule Spectroscopy of Plasmonic Metal Nanoparticles in Living Cells

Yan He Department of Chemistry, Tsinghua University, Beijing 100084, China Email: [email protected]

Real time optical imaging methods for single molecule and single particle tracking are mainly dominated by fluorescence microscopy, but the inherent photobleaching and photoblinking of dye molecules greatly hinder their long time accuracy and reproducibility. A promising alternate is to use the plasmonic metal nanoparticles (MNPs) as the single molecule probes, whose spectral characteristics can be readily manipulated based on their unique size, shape and composition dependent optical properties. Compared with traditional organic dye molecules, the absorption and scattering cross-sections of MNPs are several orders of magnitude larger. Specially, they are highly photostable, allowing individual MNPs to be tracked continuously for extended period of time with no photobleaching, photoblinking, or photosaturation. Herein, we present improved optical scattering imaging apparatus and methods for detection of single MNPs and tracking their translational and rotational motions in living cells. Our methods could be widely applied to study important biological activities with single MNPs as optical contrast agents, and to investigate cell-nanoparticle interactions for efficient gene and drug delivery.

References [1] Peng, Y.; Xiong, B.; Peng, L.; Li, H.; He, Y.; Yeung, E. S., Anal. Chem. 2015, 87, 200. [2] Xu, D.; He, Y.; Yeung, E. S., Angew. Chem. Int. Ed. 2014, 53, 6951. [3] Xiong, B.; Zhou, R.; Hao, J.; Jia, Y.; He, Y.; Yeung, E. S., Nat. Commun. 2013, 4:1708. [4] Zhou, R.; Zhou, H.; Xiong, B.; He, Y.; Yeung, E. S., J. Am. Chem. Soc. 2012, 134, 13404. [5] Xiao, L.; Qiao, Y.; He, Y.; Yeung, E. S., J. Am. Chem. Soc. 2011, 133, 10638. [6] Hao, J.; Xiong, B.; Cheng, X.; He, Y.; Yeung, E. S., Anal. Chem. 2014, 86, 4663. [7] Xu, D.; He, Y.; Yeung, E. S., Anal. Chem. 2014, 86, 3397. [8] Cheng, X.; Dai, D.; Xu, D.; He, Y.; Yeung, E. S., Anal. Chem. 2014, 86, 2303. [9] Xiao, L.; Wei, L.; Cheng, X.; He, Y.; Yeung, E. S., Anal. Chem. 2011, 83, 7340. [10] Cheng, J.; Liu, Y.; Cheng, X.; He, Y.; Yeung, E. S., Anal. Chem. 2010, 82, 8744.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Yan He was born in Shanxia, China. He received his B.S. in chemistry from Peking University in 1995, and a M.S. in Computer Science and a Ph.D. in analytical chemistry from The University of Iowa in 2001, working under the guidance of Professor Lei Geng on fluorescence spectroscopy. He pursued postdoctoral studies on single molecule fluorescence imaging with Professor Edward S. Yeung at Ames Lab and Iowa State University during 2002–2005. He joined Hunan University and became a professor in the College of Chemistry and Chemistry Engineering in June 2005, and moved to Tsinghua University in 2016. He is working on the development of high performance optical spectroscopy and microscopy techniques for in situ real time biological investigations. Currently, his research interests focus on non-fluorescence plasmonic imaging and the temporal-spatial behaviors of single nanoparticle probes in complex environments. He has published tens of research papers on international journals, including Nature Communications, J. Am. Chem. Soc., Angew. Chem. Int. Ed., Anal. Chem., etc. He has obtained National Science Fund for Distinguished Young Scholars of China (2014) and New Century Excellent Talents in University (2007).

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Small and Bright: Illuminating Life with Functional Luminescent Nanoparticles

Gang Han 1, *

1 University of Massachusetts-Medical School

364 Plantation Street, LRB 806, Worcester, MA USA

* Corresponding author: [email protected]

Functional luminescent nanoparticles are promising materials for in vitro and in vivo optical imaging and therapy due to their unique optical and chemical properties. In this talk, I will present two new types of biocompatible luminescence nanoparticles. The first type of materials is upconversion nanoparticles (UCNPs). They absorb low energy near-infrared (NIR) light and emit high-energy shorter wavelength photons.1 Their special features allow them to overcome various problems associated with conventional imaging probe at both single molecule and ensemble levels. I will present new developments regarding engineering UCNPs towards deep tissue imaging, photodynamic therapy, optogenetic applications in neuroscience 2and immunotherapy.3 The second type of nanoparticles is persistent luminescence nanoparticles (PLNPs). They are bioluminescence-like and possess unprecedented in vivo deep tissue energy rechargeability, outstanding signal-to-noise-ratio with no need for an excitation resource (light) during imaging, and they can be directly detected with existing imaging systems.4 These nanoparticles continue to emit light for minutes or hours and, in some cases, days, after turning off the excitation source. These long-lasting, light-emitting nanocrystals can provide noninvasive imaging technology for evaluating structural and functional biological processes in living animals and patients.

References (1) Shen, J.; Zhao, L.; Han, G., Lanthanide-doped upconverting luminescent nanoparticle platforms for optical imaging-guided drug delivery and therapy. Adv Drug Deliver Rev 2013, 65 (5), 744-755. (2) Wu, X.; Zhang, Y. W.; Takle, K.; Bilsel, O.; Li, Z. J.; Lee, H.; Zhang, Z. J.; Li, D. S.; Fan, W.; Duan, C. Y.; Chan, E. M.; Lois, C.; Xiang, Y.; Han, G., Dye-Sensitized Core/Active Shell Upconversion Nanoparticles for Optogenetics and Bioimaging Applications. Acs Nano 2016, 10 (1), 1060-1066. (3) He, L.; Zhang, Y. W.; Ma, G. L.; Tan, P.; Li, Z. J.; Zang, S. B.; Wu, X.; Jing, J.; Fang, S. H.; Zhou, L. J.; Wang, Y. J.; Huang, Y.; Hogan, P. G.; Han, G.; Zhou, Y. B., Elife 2015, 4:e10024 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

(4) Li, Z. J.; Zhang, Y. W.; Wu, X.; Huang, L.; Li, D. S.; Fan, W.; Han, G. J Am Chem Soc 2015, 137 (16), 5304-5307.

Please enclose your biography behind the abstract.

Biography Dr. Gang Han is currently an Associate Professor in the Biochemistry and Molecular Pharmacology Department at University of Massachusetts- Medical School. He received his B.Sc. and M.S. degrees in Chemistry from Nanjing University, and his Ph.D. degree in Chemistry from University of Massachusetts- Amherst. He was a postdoctoral scholar at the Molecular Foundry, Lawrence Berkeley National Lab. He has published over 50 papers which have cited over 5400 times. He has been focusing on developing versatile luminesence nanoparticles (e.g., upconversion nanoparticles and persistent luminesence nanoparticles) for bioimaging and therapy. He was honored a Worcester Foundation Mel Cutler Award, a UMASS CVIP Technology Development Fund award, UMASS Clinical and Translational Science Award , a NIH Eureka Award and a Human Frontier Science Program Young Investigator Award, and an Alex's Lemonade Stand Foundation innovation award.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Measuring binding kinetics of bio-conjugated nanomaterials with intact cells

Wei Wang School of Chemistry and Chemical Engineering, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210093, China Email: [email protected]

Antibody-conjugated nanomaterials have attracted emerging attentions because of their applications in nanomedicine and nanotheranostics. The interaction between nano-conjugates and cell membrane is the first key step for them to get into the cells and to take effects. However, it remains challenging to clarify how these nano-conjugates dynamically bind to cell membranes. To address this question, we present a surface plasmon resonance microscopy approach to quantitatively study in situ binding kinetics of antibody-functionalized gold nanoparticles with antigen-expressing native cells. The results are analyzed in terms of a transition from monovalent binding model to a bivalent binding model when the conjugation density and expressing level increase. These findings are anticipated to help the design and optimization of bio-functionalized nanomaterials for drug delivery and nanomedicine.

References [1] Wei Wang, Yunze Yang, Shaopeng Wang, Vinay J Nagaraj, Qiang Liu, Jie Wu and Nongjian Tao*, Label-free measuring and mapping of binding kinetics of membrane proteins in single living cells, Nature Chem., 2012, 4, 846-853. [2] Wei Wang, Kyle Foley, Xiaonan Shan, Shaopeng Wang, Seron Eaton, Vinay J. Nagaraj, Peter Wiktor, Urmez Patel, Nongjian Tao*, Single cells and intracellular processes studied by a plasmonic-based electrochemical impedance microscopy, Nature Chem., 2011, 3, 249-255. [3] Linliang Yin, Yunze Yang, Shaopeng Wang, Wei Wang*, Shengtao Zhang*, Nongjian Tao*, Measuring binding kinetics of antibody-conjugated gold nanoparticles with intact cells, Small, 2015, 11, 3782-3788. [4] Wei Wang, Linliang Yin, Laura Gonzalez, Shaopeng Wang, Xiaobo Yu, Seron Eaton, Shengtao Zhang, Hong-Yuan Chen*, Joshua LaBaer*, Nongjian Tao*, In situ drug-receptor binding kinetics in single cells: a quantitative label-free study of anti-tumor drug resistance, Sci. Rep., 2014, 4, 6609. [5] Linliang Yin, Wei Wang*, Shaopeng Wang, Fenni Zhang, Shengtao Zhang*, Nongjian Tao*, How does fluorescent labeling affect the binding kinetics of proteins with intact cells?, Biosens. Bioelectron., 2015, 66, 412-416. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Wei Wang was born in Hubei, China. He received his B.S. in 2004 and Ph.D. in analytical chemistry in 2009, both from department of chemistry at University of Science and Technology of China (USTC). He pursued postdoctoral studies on surface plasmon resonance microscopy with Professor Nongjian Tao at Arizona State University during 2009-2013. He joined in the faculty of Nanjing University in December 2013. His current researches involve single cell, single nanoparticle and single molecule imaging with advanced optical microscopy. He received the supports from National Science Fund for Excellent Young Scholars of China (2015) and Thousand Young Talents Program (2013). 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Tailoring Nanostructures for Solar Energy Conversions

Jia Zhu College of Engineering and Applied Sciences Nanjing University

Supplying the world with sustainable energy is one of the most pressing issues in modern society. Nanostructures with carefully tailored properties (such as interface, impurities) can be used to manipulate the flow of phonons, electrons and photons, to enable novel energy devices in an unconventional manner. In this talk, I will present two recent examples of nanostructure-enabled solar energy devices.

We report a plasmonic absorber, which can enable an average measured absorbance of ~ 99% across the wavelengths from 400 nm to 20 µm, the most efficient and broadband plasmonic absorber reported so far. The absorber is fabricated through self-assembly of metallic nanoparticles onto a nanoporous template by one step deposition process. Because of its efficient light absorption and strong field enhancement, it can enable very efficient solar steam generation with over 90% efficiency, the highest efficiency reported. The first plasmon enhanced solar desalination device is also demonstrated.

While silicon is considered as one of the most important materials for many energy applications, such as photovoltaics, Li-ion battery and thermoelectrics, most of silicon processes are historically developed for electronics not for energy applications. However, energy applications have very different requirements for materials (such as size, purity and cost). Here I will demonstrate that high quality and highly purified Si nanomaterials with fine control of size and geometry can be achieved through a self-purification process from low grade sources. Biography Dr. Jia Zhu is a Professor at College of Engineering and Applied Sciences, Nanjing University. His scientific research interest is in the area of nanostructures, nanophotonics and nanoscale heat transfer.

Dr. Zhu obtained his bachelor in Physics at Nanjing University, received his M.S. and Ph.D. in Electrical Engineering from Stanford University. He worked as a postdoctoral fellow at University of California, Berkeley and Lawrence Berkeley National Lab. In Sept. 2013 he returned back to Nanjing University, to be a Professor at College of Engineering and Applied Sciences. He has received several prestigious awards including: Youth “973” (2015), Youth One-thousand Program (2014), Division of Inorganic Chemistry Yong Investigator Award (American Chemical Society, 2011), Gold Medal of Graduate Student Award (Material Research Society, 2010), Chinese Government Award for Outstanding Students Abroad (2009). 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Designing Two-Dimensional Materials and Conjugated Redox Polymers for Safe and Low-Cost Energy Storage

Yan Yao1,2,* 1 Department of Electrical Engineering, University of Houston, Houston, Texas, United States 2 Texas Center for Superconductivity, Houston, Texas, United States * Corresponding author: [email protected]

To meet surging demands for sustainable energy and clean environment, one critical requirement is to develop high-energy, safe and low-cost rechargeable batteries for electric transportation and grid storage. At the foundation of these batteries are innovative material designs to control the behaviors of ions, electrons, and redox reactions. In the first part of this presentation, I will show our recent work using an interlayer expansion approach to overcome the large Mg2+ ion diffusion barrier to significantly enhance the diffusivity in Mg rechargeable batteries. [1-3] Theory, synthesis, electrochemical measurements, and kinetic analysis are combined to improve Mg diffusion behavior in MoS2, which is a poor Mg transporting material in its pristine form. The expansion boosts Mg conductivity by two orders of magnitude, effectively enabling the otherwise barely active MoS2 to approach its theoretical storage capacity as well as to achieve one of the highest rate capabilities. The discovery will lead to novel mechanisms and material designs for multivalent ion storage and open the way to high- energy-density, low-cost and safe batteries. In the second part, I will demonstrate a “π-conjugated redox polymer” simultaneously featuring a π-conjugated backbone and integrated redox sites, which can be stably and reversibly n-doped to a high doping level of 2.0 with significantly enhanced electronic conductivity. P(NDI2OD-T2) delivers 95% of its theoretical capacity at a high rate of 100C (72 s per charge−discharge cycle) under practical measurement conditions as well as 96% capacity retention after 3000 cycles of deep discharge−charge. Electrochemical, impedance, and charge- transport measurements unambiguously demonstrate that the ultrafast electrode kinetics of P(NDI2OD-T2) are attributed to the high electronic conductivity of the polymer in the heavily n- doped state. [4] Further modification on chemical structures improves specific capacity over 200 mAh/g while maintaining faster electrode kinetics.

References 1. Yanliang Liang, Hyun Deog Yoo, Yifei Li, and Yan Yao* Interlayer-expanded molybdenum disulfide nanocomposites for electrochemical magnesium storage, Nano Letters 2015, 15, 2194-2202. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

2. Hyun Deog Yoo, Yanliang Liang, Yifei Li, and Yan Yao* High areal capacity hybrid magnesium−lithium-ion battery with 99.9% Coulombic efficiency for large-scale energy storage, ACS Applied Materials and Interfaces 2015, 7, 7001-7007. 3. Qinyou An, Yifei Li, Hyun Deog Yoo, Liqiang Mai*, and Yan Yao*, Graphene decorated vanadium oxide nanowire aerogel for long-cycle-life magnesium battery cathodes, Nano Energy 2015, 18, 265-272. 4. Yanliang Liang, Zhihua Chen, Yan Jing, Yaoguang Rong, Antonio Facchetti, and Yan Yao*, Heavily n-dopable π-conjugated redox polymers with ultrafast energy storage capability J. Am. Chem. Soc. 2015, 137, 4956-4959.

Biography Yan Yao is the Robert A. Welch Assistant Professor in the Department of Electrical and Computer Engineering and Texas Center for Superconductivity at the University of Houston. He studied Materials Science (B.S. and M.S.) from Fudan University (1996- 2003) and Materials Science and Engineering (Ph.D.) at the University of California, Los Angeles (UCLA, 2003-2008). He worked at Polyera Corporation as a Senior Scientist and Stanford University as a Postdoc Scholar before joining the faculty at the University of Houston in 2012. His current research focuses on designing materials and architectures for electrochemical energy storage. His research has been supported by governmental agencies including the National Science Foundation, Department of Defense, and Department of Energy. Notably he has received the Office of Naval Research Young Investigator Award and he was one of 22 awardees in the Department of Energy’s ARPA-E RANGE program for his aqueous battery technology and a team member as one of 41 awardees in ARPA-E OPEN 2015 for developing all-solid-state-batteries. His research has been widely cited in the scientific community (~12,000 total citations and h-index = 31) and extensively covered by the media.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Solution-processed oxide films

as charge-transporting interlayers for optoelectronics

Yizheng Jin 1,*

1 Center for Chemistry of High-Performance and Novel Materials, State Key Laboratory of Silicon Materials, Department of Chemistry, Zhejiang University, Hangzhou 310027

* Corresponding author: [email protected]

Solution-processed optoelectronic devices, such as light-emitting diodes (LEDs) and solar cells, are attractive owning to the advantages of fabricating low-cost and large-area devices and the compatibility with light-weight and flexible plastic substrates. In this talk, I will present our activities on developing solution-processed oxide interfacial materials, including ZnO films as electron-transporting interlayers and NiO films as hole-transporting interlayers.1-4 I will also give a few examples of high-performance devices with oxide interfacial layers fabricated in our lab.5-6

References [1] Liang, X.; Yi, Q.; Bai, S.; Dai, X.; Wang, X.; Ye, Z.; Gao, F.; Zhang, F.; Sun, B.; Jin, Y. Nano Lett. 2014, 14:3117. [2] Bai, S.; Jin, Y.; Liang, X.; Ye, Z.; Wu, Z.; Sun, B.; Ma, Z.; Tang, Z.; Wang, J.; Würfel, U.; Gao, F.; Zhang, F. Adv. Energ. Mater. 2015, 5: 1401606. [3] Yang, Y. F.; Jin, Y. Z.; He, H. P.; Wang, Q. L.; Tu, Y.; Lu, H. M.; Ye, Z. Z. J. Am. Chem. Soc. 2010, 132: 13381. [4] Liang, X.; Ren, Y.; Bai, S.; Zhang, N.; Dai, X.; Wang, X.; He, H.; Jin, C.; Ye, Z.; Chen, Q.; Chen, L.; Wang, J.; Jin, Y. Chem. Mater. 2014, 26: 5169. [5] Dai, X.; Zhang, Z.; Jin, Y.; Niu, Y.; Cao, H.; Liang, X.; Chen, L.; Wang, J.; Peng, X. Nature 2014, 515: 96. [6] Wang, J.; Wang, N.; Jin, Y.; Si, J.; Tan, Z. K.; Du, H.; Cheng, L.; Dai, X.; Bai, S.; He, H.; Ye, Z.; Lai, M. L.; Friend, R. H.; Huang, W. Adv. Mater. 2015, 27: 2311.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Dr. Yizheng Jin is a Professor of Chemistry at Zhejiang University, China. His research interests encompass material chemistry, device engineering and device physics of solution-processed optoelectronics. His research has resulted in over 50 journal papers. Prof. Jin received several awards, including National Natural Science Funds for Excellent Young Scholar, Chinese Chemical Society Award for Outstanding Young Chemist and Top 10 scientific advances of 2014 in China.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Piezotronics Enhancement in Solar Energy Harvesting and Electrochemical Catalytic Systems

Xudong Wang Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA Email: [email protected]

Recent discovery of the piezotronic effect revealed that when a strain is experienced by a piezoelectric semiconductor material or device, it can introduce interfacial charge redistribution and lead to significant performance gain or new functionality. In this talk, we will discuss the coupling of piezoelectric polarization and the intrinsic electric field in a space charge region for the purpose of tuning charge transport behaviors in Wurtzite materials. Three piezotronic-enhanced or enabled applications will be introduced as successful examples. The piezotronic effect has been applied to the ZnO/PbS quantum dot (QD) heterojunction for engineering the interfacial band structure and depletion region. This method escalated the solar energy efficiency by 30% when a relatively small strain -0.25% was applied to the QDSC under low-intensity illumination.[1] The enhancement of short circuit current and efficiency was mostly due to the expansion of depletion region in PbS, as a result of piezoelectric polarization-induced charge redistribution at the ZnO/PbS interface. Similarly, piezotronic effect could enhance the oxygen evolution reaction (OER) in photoelectrochemical (PEC) systems. In a Ni(OH)2- decorated ZnO photoanode system, appreciably improved photocurrent density of sulfite and hydroxyl oxidation reactions were obtained by physically deflecting the photoanode.[2] A largely enhanced performance of PEC photoanodes was also obtained by ferroelectric polarization-endowed band engineering on the basis of TiO2/BaTiO3 core/shell nanowires.[3] Numerical model was established to calculate the potential distribution across the catalyst/piezoelectric/electrolyte heterojunction and reveal favorable electronic band bending as a result of internal piezoelectric polarization. Furthermore, the strain-induced piezopolarization can direct interact with electrochemical processes, which is denoted as the piezocatalysis effect. By straining a ferroelectric PMN-PT beam in water, we experimentally demonstrated that piezoelectric potential can raise the energy of electrons at the surface of piezoelectric material (or electrode) to such a level that is sufficient to drive proton reduction reactions within its immediate vicinity.[4] A piezocatalyst can realize self- or remotely-activated electrochemical processes from ambient oscillations or applying acoustic waves, respectively. In summary, interfacing between piezotronics and electrochemical systems will open a new route for engineering the catalytic properties of conventional catalysts via mechanical straining.

REFERENCES [1]. J. Shi, P. Zhao, X. Wang Adv. Mater., 2013, 25, 916. [2]. H. Li, Y. Yu, M.B. Starr, Z. Li, X. Wang J. Phys. Chem. Lett., 2015, 6, 3410. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

[3]. W. Yang, Y. Yu, M.B. Starr, X. Yin, Z. Li, A. Kvit, S. Wang, P. Zhao, X. Wang Nano Lett., 2015, 15, 7574. [4]. M.B. Starr, J. Shi, X. Wang Angew. Chem. Int. Ed., 2012, 51, 5962.

Biography: Dr. Xudong Wang is an associate professor in the department of Materials Science and Engineering at University of Wisconsin – Madison. He received his PhD degree from Georgia Tech in 2005. His current research interests include understanding the coupling effect between piezoelectric polarization and semiconductor functionalities, and studying the growth mechanisms and developing assembly techniques of oxide nanostructures for mechanical and solar energy harvesting. He has published more than 90 papers in peer reviewed scientiﬁc journals, contributed 9 book chapters in his research ﬁeld, and holds 7 patents/provisional patents on oxide nanostructures and nanomaterial-enhanced energy harvesting. His publications have been cited over 6,000 times by peers and his current h- index is 36. He is the recipient of NSF CAREER Award, DARPA Young Faculty Award, 3M Non-Tenured Faculty Award, Ross Coffin Purdy Award, and Technology Review Young Innovators Under 35 Award.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Advanced Unconventional Supercapacitors based on Nanocarbon Materials

Zhiqiang Niu*1 1 Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China. * Corresponding author: [email protected]

By combining SWCNT films with polydimethylsiloxane with enhanced prestrain, we achieved highly stretchable buckled SWCNT films. Using these buckled SWCNT films as electrodes, highly stretchable integrated SWCNT film supercapacitors with 120% stretchability were obtained.[1] As a reverse case, highly compressible all-solid-state supercapacitors were also assembled based on nanostructured polyaniline-SWCNTs-sponge electrodes, which were achieved by combining “dipping and drying” strategy and chemical oxidation polymerization process.[2] In addition to SWCNT film, porous reduce graphene oxide (RGO) foams were fabricated by a leavening strategy.[3] Based on RGO foams, flexible supercapacitors can be assembled and show stable performance under bending state. By combining photolithography with selective electrophoretic buildup, flexible and all-solid-state micro-supercapacitors were achieved.[4] Besides, Using RGO/cellulose fiber composite paper as electrodes, foldable supercapacitors were obtained based on PVA/H2SO4 electrolyte.[5]

References 1. Niu Z. Q.; Dong H. B.; Zhou W. Y.; Chen X. D.; Xie S. S.; Adv. Mater. 2013, 25, 1058. 2. Niu Z. Q.; Zhou W. Y.; Chen X. D.; Chen J., Xie S. S.; Adv. Mater. 2015, 27, 6002 3. Niu Z. Q.; Chen J.; Hng H. H.; Ma J.; Chen X. D.; Adv. Mater. 2012, 24, 4144. 4. Niu Z. Q.; Zhang L.; Liu L. L.; Dong H. B.; Chen X. D.; Adv. Mater. 2013, 25, 4035. 5. LiuL. L.; Niu Z. Q.; Zhang L.; Chen X. D.; Xie S. S.; Adv. Mater. 2014, 26, 4855.

Biography Zhiqiang Niu is a Professor at College of Chemistry, Nankai University. He received his PhD degree from Institute of Physics, CAS, in 2010 under the supervision of Prof. Sishen Xie. After his postdoctoral research in Nanyang Technological University (Singapore, co-supervisor: Prof. Xiaodong Chen), he started his independent research career as Hundred Young Academic Leaders of Nankai University since 2014. He has been awarded the National Youth Thousand Talents of China (2015). He has published more than 40 peer-reviewed journal papers and 3 book chapters on nanocarbon materials and supercapacitors. His research interests include nanocarbon materials & advanced energy storage devices. 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Nanostructures for Beyond Li-ion Batteries

Liangbing (Bing) Hu*

1 University of Maryland College Park, Maryland, United States *[email protected]

Keywords: Wood mesostructures, Garnet Electrolyte, Na-ion Batteries, Solid State Batteries, Nanostructures, Transient Batteries

I will discuss our recent publications on a few emerging research directions on advanced batteries beyond Li-ion. (1) Solid state Li metal batteries with Garnet nanostructures. Garnet nanofibers that enables flexible solid-state electrolyte membrane and Li metal anode will be discussed. (2) Transient batteries that can “disappear” within a few minutes when a trigger is applied. (3) Sodium ion batteries that use low cost, high-performance wood-mesostructures. (4) Nano/Micro batteries that enable use to in-situ investigate the electronic and optoelectronics properties of individual battery particles/nanosheets during charging-discharging processes.

[1] Fei Shen, Wei Luo, Liangbing Hu et al. Ultra-thick, Low-Tortuosity, and Mesoporous Wood Carbon Anode for High-Performance Sodium-Ion Batteries, Advanced Energy Materials, 2016 [2] Kun Fu, Yunhui Gong, Eric Wachsman, Liangbing Hu et al. Flexible, Solid-State Lithium Ion-conducting Membrane with 3D Garnet Nanofiber Networks, PNAS, 2016 [3] Fu, K.; Liu, Z.; Yao, Y.; Wang, Z.; Zhao, B.; Luo, W.; Dai, J.; Lacey, S.; Zhou, L.; Shen, F.; Kim, M.; Swafford, L.; Sengupta, L.; Hu, L. Transient Rechargeable Batteries Triggered by Cascade Reactions，Nano Lett, 2015, 15, 4664 [4] Liu, Z.; Fu, K.; Wang, Z.; Zhu, Y.; Wan, J.; Yao, Y.; Dai, J.; Kim, M.; Swafford, L.; Wang, C.; Hu, L.Cut-and-stack nanofiber paper toward fast transient energy storage, Inorg. Chem. Front, 2016, Online. [5] Luo, W.; Shen, F.; Bommier, C.; Zhu, H.; Ji, X.; Hu, L. Na-Ion Battery Anodes: Materials and Electrochemistry, Account Review, 2016, 49, 231 [6] Wan, J.; Bao, W.; Liu, Y.; Dai, J.; Shen, F.; Zhou, L.; Cai, X.; Urban, D.; Li, Y.; Juangjohann, K.; Fuhrer, M.; Hu, L. In Situ Investigations of Li-MoS2 with Planar Batteries, Advanced Energy Materials, 2014, 1, 1401742. [7] Wan, J.; Gu, F.; Bao, W.; Dai, J.; Shen, F.; Luo, W.; Han, X.; Urban, D.; Hu, L. Sodium-ion Intercalated Transparent Conductors with Printed Reduced Graphene Oxide Networks, Nano Letter, 2015, 15, 3763 [8] Bao, W.; Wan, J.; Han, X.; Cai, X.; Zhu, H.; Kim, D.; Ma, D.; Munday, J.; Drew, D.; Fuhrer, M.; Hu, L. Approaching the Limits of Transparency and Conductivity in Graphitic Materials through Lithium Intercalation, Nature Communications, 2014, 5, 4224.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Liangbing Hu （胡良兵） received his B.S. in physics from the University of Science and Technology of China (USTC) in 2002, where he worked with Prof Yuheng Zhang on colossal magnetoresistance (CMR) materials for three years. He did his Ph.D. in at UCLA (with George Gruner), focusing on carbon nanotube based nanoelectronics (2002- 2007). In 2006, he joined Unidym Inc (www.unidym.com) as a co-founding scientist. At Unidym, Liangbing’s role was the development of roll-to-roll printed carbon nanotube transparent electrodes and device integrations into touch screens, LCDs, flexible OLEDs and solar cells. He worked at Stanford University (with Yi Cui) from 2009-2011, where he work on various energy devices based on nanomaterials and nanostructures. Currently, he is an assistant professor at University of Maryland College Park. His research interests include nanomaterials and nanostructures, roll-to-roll nanomanufacturing, energy storage focusing on solid-state batteries and Na ion batteries, and printed electronics. He received many awards, including: Office of Naval Research Young Investigator Award (2016), ACS Division of Energy and Fuel Emerging Investigator Award (2016), SME Outstanding Young Manufacturing Engineer Award (2016), University of Maryland Junior Faculty Award (School of Engineering, 2015), 3M Non-tenured Faculty Award (2015), Maryland Outstanding Young Engineer (2014), University of Maryland Invention of Year (2013 Physical Science), Campus Star of the American Society for Engineering Education (2014), Air Force Young Investigator Award (AFOSR YIP, 2013). For more info, please visit www.bingnano.umd.edu

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Rational Design of Carbon/Inorganic Nanostructures for Efficient Energy Conversion and Storage

Zhong Jin, 1,* Jie Liu 1,2 1 Key Laboratory of Mesoscopic Chemistry of MOE and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210093, China 2 Department of Chemistry, Duke University, Durham, NC 27708, USA * Corresponding author: [email protected]

Nanostructures composed of carbon and inorganic materials (transition metal oxides, chalcogenides, carbides... etc.) can exhibit high conductivity, porosity, flexibility, electrochemical and catalytic performances. For high-efficiency energy storage and conversion (such as solar cells, photo-/electro-catalysis and secondary batteries), it is of great importance to rationally design and fabricate ordered carbon/inorganic hybrid nanostructures. In the past 2 years, our newly-built research group has worked on the construction of 3D hierarchical carbon/inorganic based architectures with precisely-designed components and structures for energy applications, such as: (1) Flexible solar-power harvesting and storage integrated devices [1]. (2) High-efficiency electro- and photo-catalysts for hydrogen and oxygen evolution reactions [2-3]. (3) Active material encapsulated mesoporous carbon matrix as high-performance anodes and cathodes for lithium and sodium ion batteries [4-9].

References [1] Liang, J.; Zhu, G.; Jin, Z.*; Liu, J.*; et al. 2016, submitted. [2] Ma, L.; Jin, Z.*; Liu, J.*; et al. Nano Energy, 2016, 24, 139. [3] Liu, H.; Jin, Z.*; Liu, J.*; et al. 2016, submitted. [4] Wang, Y.; Chen. R.; Jin, Z.*; Liu, J.*; et al. Energy Storage Materials, 2016, 4, 103. [5] Chen, T.; Jin, Z.*; Liu, J.*; et al. Nano Energy, 2016, 20, 305. [6] Sun, P.; Jin, Z.*; Liu, J.*; et al. Nanoscale, 2016, 8, 7408. [7] Chen, T.; Jin, Z.*; Liu, J.*; et al. Journal of Materials Chemistry A, 2015, 3, 9510. [8] Ma, L.; Chen. T.; Jin, Z.*; Liu, J.*; et al. Journal of Power Sources, 2016, minor revision. [9] Zhu, G.; Jin, Z.*; Liu, J.*; et al. 2016, submitted.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Biography Zhong Jin was born in Jiangxi, China in 1983. He received his B.S. in material chemistry from Peking University in 2003, and a PhD in inorganic chemistry from Peking University in 2008 on nanomaterials and nanostructures with the advisory of Professor Yan Li. He pursued postdoctoral studies on nanoscale science and technology in Professor James M. Tour’s Group at Rice University (2008-2010), and in Professor Michael S. Strano’s Group at MIT (2010-2014). He has obtained the support of National Young Thousand Talent Program and became a tenure-track professor in the School of Chemistry and Chemical Engineering at Nanjing University in May 2014. He has published more than 50 research papers on international journals, such as Nature Communications, Nature Chemistry, J. Am. Chem. Soc., Nano Lett., ACS Nano, Adv. Funct. Mater., Chem. Mater. etc. He is working on nanomaterials for clean energy applications. His current research interests include: (1) Novel materials and devices for high-efficiency energy conversion and storage (such as solar cells, photo-/electro-catalysis and rechargeable batteries); (2) Controlled growth and property modulation of low-dimensional carbon and other inorganic based nanostructures, such two-dimensional atomic crystals; (3) Ordered assembly and applications of three-dimensional hierarchical nano-/micro-scale structures.

11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016

Antimonene (2D Sb): Theoretical Prediction, Synthesis, Properties

Shengli Zhang, Haibo Zeng* Institute of Optoelectronics and Nanomaterials, Nanjing University of Science & Technology * Corresponding author: [email protected]

Optoelectronic applications require materials both responsive to objective photons and able to transfer carriers, so new two-dimensional (2D) semiconductors with appropriate bandgaps and high mobilities are highly desired. However, 2D semiconductors are still so limited that all bandgaps are below 2.0 eV, which have greatly restricted their applications, especially in optoelectronic devices with photoresponse in the blue and UV bands. In this talk, I will introduce our progresses on 2D Group 15, including theoretical prediction, synthesis, and properties. Firstly, we report monolayered arsenene and antimonene with both wide bandgaps and high stability based on the first-principles calculations [1]. Interestingly, although As and Sb bulks are typical semimetals, they are transformed into indirect semiconductors with band gaps of 2.49 and 2.28 eV when thinned into one atomic layer. Significantly, further loading of tiny biaxial strain can transform them from indirect into direct band-gap semiconductors. Such dramatic electronic structure transitions could open a new door for transistors with high on/off ratio, blue/UV optoelectronic devices, and mechanical sensors based on new 2D crystals. Furthermore, we report on the discovery of attractive broadband photoresponse and high mobility of 2D Group 15 allotropes (phosphorene, arsenene, antimonene and bismuthene) [2]. The calculated binding energies and phonon band dispersions of 2D Group 15 allotropes exhibit thermodynamic stability. The energy band gaps of 2D semiconducting Group 15 monolayers cover a wide range from 0.36 to 2.62 eV, which are crucial for broadband photoresponse. Significantly, phosphorene, arsenene, and bismuthene possess carrier mobilities as high as several thousand cm2V-1 s-1. Combining such broad band gaps and superior carrier mobilities, 2D Group 15 monolayers are promising candidates for nanoelectronics and optoelectronics. Finally, we report the first experimental preparation and exact atomical structure of large quantity, high quality, free-standing few-layer antimonene nanosheets, as well as their unexpected but outstanding nonlinear optical limiting properties [3]. The XRD, Raman spectroscopy and TEM characterizations reveal the buckled hexagonal crystal structure of few-layer antimonene. Our experimental results prove that atomically thin antimonene with the predicted β-phase is very stable in ambient conditions. Raman spectroscopy also provides a convenient metric for identifying the thickness of antimonene nanosheets. Surprisingly, we also find that antimonene nanosheets present excellent 532 nm ~ 2000 nm broadband optical limiting and high transmission performance when dispersed in solutions or doped in Ormosil gel glasses, which might lead to 11th Sino-US Nano Forum, Nanjing, China, 18-20 June, 2016 many promising applications in nonlinear optical fields such as laser protection. This work reveals that Group 15 2D materials beyond BP could be not only a new 2D crystal family with stability in ambient condition, but also of unique properties and applications.

Figure 1. Left, theoretically predicted atomical and electronic structures of antimonene and arsenene. Middle, AFM image of the fabricated few-layer antimonene. Right, experimental atomical structure of bilayer antimonene obtained by Spherical aberration of electron microscope.

References 1. Shengli Zhang, Zhong Yan, Yafei Li, Zhongfang Chen, Haibo Zeng, Atomically Thin Arsenene and Antimonene: Semimetal-semiconductor and Indirect-direct Band Gap Transitions, Angew. Chem. In. Ed. 2015, 54, 3112-3115. 2. Shengli Zhang, Meiqiu Xie, Fengyu Li, Zhong Yan, Yafei Li, Erjun Kan, Wei, Liu, Zhongfang Chen, Haibo Zeng, Semiconducting Group 15 Monolayers: A Broad Range of Band Gaps and High Carrier Mobilities, Angew. Chem. In. Ed. 2016, 55, 1666-1669. 3. Chengxue Huo, Xingming Sun, Zhong Yan, Xiufeng Song, Jizi Liu, Shuyun Zhou, Zheng Xie, Shengli Zhang, Jianping Ji, Lianfu Jiang, Haibo Zeng, Experimental Realization of Free- standing Antimonenes: Large Yield Synthesis, Atomical Structure and Unexpected Optical Limiting, Nature Materials 2016, Reviewing.

Biography Prof. Haibo Zeng is the Director of the Institute of Optoelectronics and Nanomaterials (ION) at Nanjing University of Science and Technology (NUST), China. He received his PhD degree from the Chinese Academy of Sciences (CAS) in 2006, and then worked at CAS, University of Karlsruhe (Germany), and National Institute for Materials Science (Japan). In 2011, he moved to NUST and initiated ION institute. His current research focuses on optoelectronics based on all-inorganic perovskite quantum dots and two-dimensional semiconductors, including their synthesis, optics, LED and photodetector devices. His recent representative works on these topics include the first report inorganic perovskite QLEDs (Adv. Mater. 2015, 27, 7162) and the first prediction of antimonene and arsenene (monolayer Sb and As) (Angew. Chem. In. Ed. 2015, 54, 3112). Up to now, he has published over 150 papers with more than 6000 citations.