DOCSLIB.ORG

High Yield Solvothermal Synthesis of Hexaniobate Based Nanocomposites Via the Capture of Preformed Nanoparticles in Scrolled Nanosheets

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

University of New Orleans ScholarWorks@UNO University of New Orleans Theses and Dissertations Dissertations and Theses Fall 12-20-2013 High Yield Solvothermal Synthesis of Hexaniobate Based Nanocomposites via the Capture of Preformed Nanoparticles in Scrolled Nanosheets Shivaprasad Reddy Adireddy University of New Orleans, [email protected] Follow this and additional works at: https://scholarworks.uno.edu/td Part of the Inorganic Chemistry Commons, and the Materials Chemistry Commons Recommended Citation Adireddy, Shivaprasad Reddy, "High Yield Solvothermal Synthesis of Hexaniobate Based Nanocomposites via the Capture of Preformed Nanoparticles in Scrolled Nanosheets" (2013). University of New Orleans Theses and Dissertations. 1726. https://scholarworks.uno.edu/td/1726 This Dissertation-Restricted is protected by copyright and/or related rights. It has been brought to you by ScholarWorks@UNO with permission from the rights-holder(s). You are free to use this Dissertation-Restricted in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s) directly, unless additional rights are indicated by a Creative Commons license in the record and/or on the work itself. This Dissertation-Restricted has been accepted for inclusion in University of New Orleans Theses and Dissertations by an authorized administrator of ScholarWorks@UNO. For more information, please contact [email protected]. High Yield Solvothermal Synthesis of Hexaniobate Based Nanocomposites via the Capture of Preformed Nanoparticles in Scrolled Nanosheets A Dissertation Submitted to the Graduate Faculty of the University of New Orleans in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Chemistry By Shivaprasad Reddy Adireddy B.S. Osmania University, 2005 M.S. University of New Orleans, 2011 Copyright 2012, Shivaprasad Reddy Adireddy ii To The People Who Make This World A Better Place iii Acknowledgements Along the journey of my Ph.D. I have been helped by several people. First I wish to express my deep gratitude and sincere thank you to my research advisor Professor John B. Wiley for his cooperation, constructive criticism, encouragement and valuable guidance during the course of my study. After joining the group, I always received enormous amount of help from my adviser in choosing my project and setting up my work space. I am truly grateful for his keen interest, responsive action, remarkable feedback and extreme support throughout the course of my research. I also would like to thank my dissertation committee members, Prof. Mathew Tarr, Prof. Leszek Malkinski, and Prof. Steven Rick, for helpful discussions and suggestions. I am also thankful to each and every member of Department of Chemistry and Advanced Materials Research Institute for their help and support throughout my PhD. They are also acknowledged for providing an academically stimulating environment in the department. I am thankful to my present and past group members, namely Dr. Yuan Yao, Dr. Elisha Josepha, Dr. Debasish Mohanty, Dr. Girija S. Chaubey, Mohammad Montasserasadi, Jagnyaseni Tripathy, Lea Gustin, Cecilia Carbo, Taha Rostamzade, Treva Brown, Mayra Franco and Sara Tefaghi. I remember all the great moments that I had with my group members, I am thankful for their time, and great friendship. It was an honor and great pleasure to be a part of the Wiley group. The project work would not have been possible without the friendly support and timely help of my colleagues and friends, especially Prof. Leonard Spinu, Dr. Jose Vargas, Dr. Avijit Biswas, Dr. Jiajun Chen, Dr. Kai Wang, Dr. Bao Bao Cao, Sarah Wozny, Pramathesh Maji, Sanjeeva Dodlapati, Abhishek Srivastava, Satish Rai, Sudhendu Azad, Pinkesh Attarwala, iv Sravan Burla, Vempati Satheesh, Deepak Mudili, Thilo Buck, Curt Click, Vijay Burla, Rupal Shah, Jenny Martin, Aubrie Pfirman, Jugal Shah, Thilo Buck, Rajesh Komatineni, Meet Singh, Rupa Biradar, and Sandeep Bandi. I also want to thank my grandparents, family friends and relatives for their wishes, blessings, and help; and last, but not least, my parents, for their endless love, support, and encouragement. Financial support from the Louisiana Board of Regents Post-Katrina Support Fund Initiative (PKSFI) is gratefully acknowledged. v Table of Contents List of Figures .................................................................................................................. viii List of Tables ................................................................................................................... xiii Abstract ............................................................................................................................ xiv Chapter 1 Introduction........................................................................................................1 1.1 Nanotechnology ....................................................................................................1 1.2 Nanomaterials .......................................................................................................2 1.2.1 Zero-Dimensional (OD) Nanostructures...............................................6 1.2.2 One-Dimensional (1D) Nanostructures ..............................................16 1.3 Layered Inorganic Materials ...............................................................................19 1.3.1 K4Nb6O17.............................................................................................22 1.3.2 Hexaniobate Based Nanocomposites ..................................................25 1.3.3 Peapods ...............................................................................................27 1.4 References ...........................................................................................................29 Chapter 2 Rapid Large-scale Fabrication of Hexaniobate Nanoscrolls ...........................41 2.1 Introduction .........................................................................................................41 2.2 Experimental .......................................................................................................43 2.2.1 Preparation of Niobate Nanoscrolls ....................................................44 2.2.2 Characterization ..................................................................................45 2.3 Results .................................................................................................................46 2.3.1 Solvothermal Synthesis .......................................................................47 2.3.2 Factors Influencing Nanoscroll Formation and Architecture .............51 2.3.3 Other Intercalants ................................................................................54 2.3.4 Dispersion in Different Solvents .........................................................56 2.3.5 Bulk and Surface Characterization .....................................................57 2.4 Discussion ...........................................................................................................61 2.5 Conclusions .........................................................................................................65 2.6 References ...........................................................................................................66 Chapter 3 High Yield Solvothermal Synthesis of Magnetic Peapod Nanocomposites via the Capture of Preformed Nanoparticles in Scrolled Nanosheets .............71 3.1 Introduction .........................................................................................................71 3.2 Experimental .......................................................................................................73 3.2.1 Niobate Nanosheets ............................................................................73 3.2.2 Magnetic Nanoparticle Synthesis .......................................................74 3.2.3 Synthesis of Magnetic NP@hexaniobate Nanopeapods .....................75 3.2.4 Characterization ..................................................................................76 3.3 Results .................................................................................................................76 3.4 Discussion ...........................................................................................................88 3.5 Conclusions .........................................................................................................93 3.6 References ...........................................................................................................93 vi Chapter 4 A General Method for the Fabrication of Hexaniobate-Based Nanocomposites .............................................................................................101 4.1 Introduction .......................................................................................................101 4.2 Experimental .....................................................................................................103 4.2.1 Niobate Nanosheets ..........................................................................104 4.2.2 Nanoparticles ....................................................................................105 4.2.3 Synthesis of Nanopeapods with Various NPs ...................................107 4.2.4 Modification of Nanosheets and Nanoscrolls ...................................107 4.2.5 Gold Insertion into
Recommended publications
  • Small Wonders the US National Nanotechnology Initiative Has Spent Billions of Dollars on Submicroscopic Science in Its First 10 Years

    Small Wonders the US National Nanotechnology Initiative Has Spent Billions of Dollars on Submicroscopic Science in Its First 10 Years

    NEWS FEATURE NATURE|Vol 467|2 September 2010 Simulation of the flow pattern for electrons travelling over a random nanoscale landscape. Small wonders The US National Nanotechnology Initiative has spent billions of dollars on submicroscopic science in its first 10 years. Corie Lok finds out where the money went and what the initiative plans to do next. ichard Smalley’s cheeks were gaunt and promised to conduct electricity better than It was a message that Washington was ready his hair was nearly gone when he testi- copper, but also had the potential to produce to hear. US President Bill Clinton formally fied before the US House of Representa- fibres 100 times stronger than steel at one- announced the initiative in 2000, with bipar- tives in June 1999. The Nobel laureate sixth of the weight. Smalley also predicted tisan support from Congress. The initiative R, HARVARD UNIV. HARVARD R, R E chemist had been diagnosed with non-Hodg- that the “very blunt tool” of chemotherapy that has faced some criticism in the decade since LL kin’s lymphoma a few months earlier, chemo- had ravaged his own body would be obsolete — most notably for its slowness to address E therapy was taking its toll, and the journey within 20 years, because scientists would engi- environmental, health and safety concerns H J. E. from Rice University in Houston, Texas, had neer nanoscale drugs that were “essentially about nanomaterials. But it has also created been exhausting. But none of that dimmed his cancer-seeking missiles” able more than 70 nano-related obvious passion for a subject that his listen- to target mutant cells with “As chemists, we academic or government ers found both mystifying and enthralling: minimal side effects.
  • Geometric and Electronic Properties of Graphene-Related Systems: Chemical Bondings Arxiv:1702.02031V2 [Physics.Chem-Ph] 13

    Geometric and Electronic Properties of Graphene-Related Systems: Chemical Bondings Arxiv:1702.02031V2 [Physics.Chem-Ph] 13

    Geometric and electronic properties of graphene-related systems: Chemical bondings Ngoc Thanh Thuy Trana, Shih-Yang Lina;∗, Chiun-Yan Lina, Ming-Fa Lina;∗ aDepartment of Physics, National Cheng Kung University, Tainan 701, Taiwan February 14, 2017 Abstract This work presents a systematic review of the feature-rich essential properties in graphene-related systems using the first-principles method. The geometric and electronic properties are greatly diversified by the number of layers, the stacking con- figurations, the sliding-created configuration transformation, the rippled structures, and the distinct adatom adsorptions. The top-site adsorptions can induce the signif- icantly buckled structures, especially for hydrogen and fluorine adatoms. The elec- tronic structures consist of the carbon-, adatom- and (carbon, adatom)-dominated energy bands. There exist the linear, parabolic, partially flat, sombrero-shaped and oscillatory band, accompanied with various kinds of critical points. The semi-metallic or semiconducting behaviors of graphene systems are dramatically changed by the multi- or single-orbital chemical bondings between carbons and adatoms. Graphene oxides and hydrogenated graphenes possess the tunable energy gaps. Fluorinated graphenes might be semiconductors or hole-doped metals, while other halogenated systems belong to the latter. Alkali- and Al-doped graphenes exhibit the high-density free electrons in the preserved Dirac cones. The ferromagnetic spin configuration is revealed in hydrogenated and halogenated graphenes under certain distributions. Specifically, Bi nano-structures are formed by the interactions between monolayer arXiv:1702.02031v2 [physics.chem-ph] 13 Feb 2017 graphene and buffer layer. Structure- and adatom-enriched essential properties are compared with the measured results, and potential applications are also discussed.
  • (Title of the Thesis)*

    (Title of the Thesis)*

    Rationally Engineering Porous Carbon-Based Metal Nanocomposites for Efficient and Durable Electrocatalysis Applications by Zhen Zhang A thesis presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of Doctor of Philosophy in Chemical Engineering Waterloo, Ontario, Canada, 2021 © Zhen Zhang 2021 Examining Committee Membership The following served on the Examining Committee for this thesis. The decision of the Examining Committee is by majority vote. External Examiner Dr. Feng Jiao Associate Professor Supervisor Dr. Zhongwei Chen Professor Internal Member Dr. Ali Elkamel Professor Internal Member Dr. Jeff Gostick Associate Professor Internal-external Member Dr. Zhongchao (Chao) Tan Professor ii Author’s Declaration This thesis consists of material all of which I authored or co-authored: see Statement of Contributions included in the thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. iii Statement of Contributions The body of this thesis is based upon a combination of published works. Various chapters are adapted from the following list of publications. Chapter 2 of this thesis consist of a review paper that was co-authored by myself, my supervisor, Dr. Zachary Paul Cano, Dr. Dan Luo, Dr. Haozhen Dou, Dr. Aiping Yu. I am the first author of this paper. I conceptualized study design, and performed data collection and manuscript writing. My coauthors reviewed the manuscript and provided feedback on draft manuscript. “Rational Design of Tailored Porous Carbon-Based Materials for CO2 Capture”, Journal of Materials Chemistry A, 2019, 7 (37), 20985-21003.
  • Metal Organic Frameworks in Heterogeneous Catalysis: Recent Progress, New Trends and Future Perspectives

    Metal Organic Frameworks in Heterogeneous Catalysis: Recent Progress, New Trends and Future Perspectives

    Metal–Organic Frameworks in Heterogeneous Catalysis: Recent Progress, New Trends, and Future Perspectives Item Type Article Authors Bavykina, Anastasiya; Kolobov, Nikita; Khan, Il Son; Bau, Jeremy; Galilea, Adrian; Gascon, Jorge Citation Bavykina, A., Kolobov, N., Khan, I. S., Bau, J. A., Ramirez, A., & Gascon, J. (2020). Metal–Organic Frameworks in Heterogeneous Catalysis: Recent Progress, New Trends, and Future Perspectives. Chemical Reviews. doi:10.1021/ acs.chemrev.9b00685 Eprint version Post-print DOI 10.1021/acs.chemrev.9b00685 Publisher American Chemical Society (ACS) Journal Chemical Reviews Rights This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemical Reviews, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.chemrev.9b00685. Download date 04/10/2021 08:34:35 Link to Item http://hdl.handle.net/10754/662392 Metal Organic Frameworks in Heterogeneous Catalysis: Recent Progress, New Trends and Future Perspectives Anastasiya Bavykina,† Nikita Kolobov,† Il Son Khan,† Jeremy A. Bau,† Adrian Ramirez† and Jorge Gascon *† † King Abdullah University of Science and Technology, KAUST Catalysis Center (KCC), Advanced Catalytic Materials, Thuwal, 23955-6900, Saudi Arabia [email protected] Abstract More than 95% (in volume) of all today’s chemical products are manufactured through catalytic processes, making research into more efficient catalytic materials a thrilling and very dynamic research field. In this regard, Metal Organic Frameworks (MOFs) offer great opportunities for the rational design of new catalytic solids, as highlighted by the unprecedented number of publications appearing over the last decade.
  • Aggregation, of Nanoparticles 19 Dispersion and Transformation 22

    Aggregation, of Nanoparticles 19 Dispersion and Transformation 22

    325 Index a bismuth nanoparticles aggregation, of nanoparticles 19 chemical reduction 129 dispersion and transformation 22 one pot synthesis 130 mineralization 24 polyol method 129 schematic representation of 21 solvothermal method 130 albumin 294–296 thermal decomposition 128 alginate-BSA nanoparticles 296 bismuth sulphide -helix content of lysozyme 92 protein mediated 231 alumina nanoparticles solvothermal synthesis 230 precipitation method 147 sonochemical method 229 sol–gel synthesis 145 template synthesis 230 template method 146–147 blood–brain barrier (BBB) 9 aluminum nanoparticles Boltzmann entropy, characteristics of catalytic decomposition 130 44 templated synthesis 132 Boltzmann–Gibbs entropy formulae thermal decomposition 132 44 antimony oxide bottom-up approach, for nanostructures biosynthesis 151 18–19 bulk and nanoscale, properties of 13 BSA–Acacia nanoparticles 297 chemical reduction 151 chemical synthesis 149 c Gibbs energy 148 cadmium sulphide hydrothermal method 151 carbon 28 microemulsion method 149–150 chemical synthesis 231, 236 customized synthesis 237 antimony sulphide (Sb2S3) hydrothermal method 228 electrochemical method 232 laser ablation technique 228 green synthesis 234–235, 237 solvothermal method 227 hot injection method 233 thermal decomposition method b 233, 236 biomolecules 69 carbonyl decomposition 102 BSA-Acacia nanoparticles 297 CdSe quantum dot-lysozyme interaction nucleic acid nanoparticles 313–314 94 biosynthetic methods, for metal CdSe quantum dots 77, 78 nanoparticle preparation 13 cerium oxide
  • Canada August 2007

    Canada August 2007

    Self-Assembled Monolayers: Characterization and Application to Microcantilever Sensors Brian Seivewright Department of Chemistry McGill University, Montreal, Quebec, Canada August 2007 A thesis submitted to McGill University in partial fulfillment of the requirements for the degree of Doctor of Philosophy ©Copyright 2007 All rights reserved. Brian Seivewright, August 2007 Library and Bibliotheque et 1*1 Archives Canada Archives Canada Published Heritage Direction du Branch Patrimoine de I'edition 395 Wellington Street 395, rue Wellington Ottawa ON K1A0N4 Ottawa ON K1A0N4 Canada Canada Your file Votre reference ISBN: 978-0-494-50993-7 Our file Notre reference ISBN: 978-0-494-50993-7 NOTICE: AVIS: The author has granted a non­ L'auteur a accorde une licence non exclusive exclusive license allowing Library permettant a la Bibliotheque et Archives and Archives Canada to reproduce, Canada de reproduire, publier, archiver, publish, archive, preserve, conserve, sauvegarder, conserver, transmettre au public communicate to the public by par telecommunication ou par Plntemet, prefer, telecommunication or on the Internet, distribuer et vendre des theses partout dans loan, distribute and sell theses le monde, a des fins commerciales ou autres, worldwide, for commercial or non­ sur support microforme, papier, electronique commercial purposes, in microform, et/ou autres formats. paper, electronic and/or any other formats. The author retains copyright L'auteur conserve la propriete du droit d'auteur ownership and moral rights in et des droits moraux qui protege cette these. this thesis. Neither the thesis Ni la these ni des extraits substantiels de nor substantial extracts from it celle-ci ne doivent etre imprimes ou autrement may be printed or otherwise reproduits sans son autorisation.
  • Formation of Carbon Nanoscrolls from Graphene Sheet: a Molecular Dynamics Study

    Formation of Carbon Nanoscrolls from Graphene Sheet: a Molecular Dynamics Study

    Journal of Molecular Structure 1125 (2016) 282e287 Contents lists available at ScienceDirect Journal of Molecular Structure journal homepage: http://www.elsevier.com/locate/molstruc Formation of carbon nanoscrolls from graphene sheet: A molecular dynamics study * Danhui Zhang a, b, , Houbo Yang a a College of Mechanical Engineering, Linyi University, Linyi 276005, China b Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China article info abstract Article history: In recent year, carbon nanoscrolls have attracted intensive attention both in theory and experiments for Received 19 May 2016 their unique and excellent fundamental properties and the wide range of potential applications. In this Received in revised form paper, the fabrication of carbon nanoscrolls using graphene and carbon nanotubes has been studied by 26 June 2016 molecular dynamics (MD) method. The formation mechanism of carbon nanoscrolls has been presented Accepted 29 June 2016 convincing explanations. Furthermore, the position and number of carbon nanotubes also influence the Available online 1 July 2016 formation of carbon nanoscrolls. Our theoretical results will provide researchers a powerful guide and helpful assistance in designing better targeted programs in experiments. Keywords: © Graphehe 2016 Elsevier B.V. All rights reserved. Carbon nanoscroll Molecular dynamics Carbon nanotubes 1. Introduction nanopharmacology, nanobiology and nanofluidic manipulation. In order to fabricate the carbon nanostructures, using forced-field- Graphene(GN), a new two-dimensional thin film material and based molecular dynamics simulations, we proposed a feasible firstly exfoliated from the bulk graphite, has received intensive method to obtain the carbon nanostructures through self-scrolling attention due to its unique electrical and mechanical properties [1].
  • 2017 ICU Honolulu Committees Executive Committee

    2017 ICU Honolulu Committees Executive Committee

    Publication Year: 2017 Copyright © 2017 ICU Honolulu and Acoustical Society of Korea 2017 ICUHonolulu, University of Hawaii at Manoa, and the Acoustical Society of Korea shall not be liable for personal injury or damage to property or damage caused by the use, manipulation, negligence or other methods of materials, products, guidelines or ideas contained herein. ISBN 979-11-5610-347-9 (95500) Aloha! Greetings from Hawai’i! We are pleased to invite you to the International Congress on Ultrasonics (ICU), which will be held in Honolulu Hawaii on December 18 - 20, 2017. This Congress brings together multidisciplinary subjects on all aspects of Ultrasonics and will lead us into the future of “Eco-sound.” The allure of Hawai`i is well known. However, few understand how deeply Aloha can energize our lives and renew our spirit. Come and join in the discussion on what’s being accomplished in our respective specialties. Relax your body but reinvigorate your mind as we all learn what role we can play in shaping our society. Our Congress success will rely on how well the Aloha spirit will make an extraordinary experience for all who attend. We welcome you in Waikiki, a paradise of “Green Sound.” Suk Wang Yoon President International Congress on Ultrasonics (ICU) / General Chair 2017 ICU Honolulu About the International Congress on Ultrasonics The International Congress on Ultrasonics (ICU) was constituted in 2005 as the result of the merger of two existing international Congresses: The World Congress on Ultrasonics (WCU) and Ultrasonics International (UI). The ICU is currently an international affiliated member of the International Commission for Acoustics (ICA), the parent organization of many national and regional acoustical societies.
  • Nanoparticle Catalytic Enhancement of Carbon Dioxide Reforming of Methane for Hydrogen Production Nicholas Groden

    Nanoparticle Catalytic Enhancement of Carbon Dioxide Reforming of Methane for Hydrogen Production Nicholas Groden

    Louisiana Tech University Louisiana Tech Digital Commons Doctoral Dissertations Graduate School Fall 11-17-2018 Nanoparticle Catalytic Enhancement of Carbon Dioxide Reforming of Methane for Hydrogen Production Nicholas Groden Follow this and additional works at: https://digitalcommons.latech.edu/dissertations Part of the Nanoscience and Nanotechnology Commons, Other Chemical Engineering Commons, and the Other Materials Science and Engineering Commons Recommended Citation Groden, Nicholas, "" (2018). Dissertation. 3. https://digitalcommons.latech.edu/dissertations/3 This Dissertation is brought to you for free and open access by the Graduate School at Louisiana Tech Digital Commons. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of Louisiana Tech Digital Commons. NANOPARTICLE CATALYTIC ENHANCEMENT OF CARBON DIOXIDE REFORMING OF METHANE FOR HYDROGEN PRODUCTION by Nicholas Groden, M.S., B.S. A Dissertation Presented in Partial Fulfillment of the Requirements of the Degree Doctor of Philosophy COLLEGE OF ENGINEERING AND SCIENCE LOUISIANA TECH UNIVERSITY November 2018 LOUISIANA TECH UNIVERSITY THE GRADUATE SCHOOL JUNE 16, 2018 Date We hereby recommend that the dissertation prepared under our supervision by xxxxxxxxxxxxxxx Nicholas Groden, M.S., B.S. entitled Nanoparticle Catalytic Enhancement of Carbon Dioxide Reforming of Carbon Dioxide Reforming of Methane for Hydrogen Production be accepted in partial fulfillment of the requirements for the Degree of Doctor of Philosophy in Engineering Micro and Nanoscale Systems Supervisor of Dissertation Research Head of Department Department Recommendation concurred in: _____________________________ _____________________________ Advisory Committee _____________________________ _____________________________ Approved: Approved: __________________________________ ______________________________ Director of Graduate Studies Dean of the Graduate School __________________________________ Dean of the College GS Form 13 (8/10) ABSTRACT The U.S.
  • UCSD NANOENGINEERING SEMINAR Thursday, September 1, 2016 Seminar Presentation: 2:00Pm – 3:00Pm

    UCSD NANOENGINEERING SEMINAR Thursday, September 1, 2016 Seminar Presentation: 2:00Pm – 3:00Pm

    UCSD NANOENGINEERING SEMINAR Thursday, September 1, 2016 Seminar Presentation: 2:00pm – 3:00pm Cymer Conference Center Is There Still More to Atomic Force Microscopy? Novel SPM Techniques for Cellular, Electronic and Optical Imaging Aykutlu Dâna UNAM Institute of Materials Science and Nanotechnology, Bilkent University, Turkey Abstract: Scanning probe microscopy (SPM) has been one of the driving forces of nanotechnology and materials science. Over the last three decades, a large variety of SPM techniques have been developed to address imaging of form, structure and properties of micro and nanoscale materials. Despite the availability huge diversity of techniques, here we show that there is still need and opportunity for developing novel approaches using the Atomic Force Microscope. Particularly, we report development of antifouling Atomic force microscopy (AFM) tips for imaging and nanomechanical characterization of biological samples in fluid. The antifouling tips enable stable high speed imaging of live cells for prolonged durations with no visible damage to the cell vitality. Images taken at speeds of 100 µm/s scan speed at 4 Hz line frequency allow observation of moving organelles in image sequences captured on Rat Mesenchymal Stem Cells. Initial results show the potential of the tips for 3D imaging of cells. Using antifouling tips, we demonstrate a new nanomechanical mapping approach that allows rapid characterization, namely double-pass force distance mapping, where the topography information is captured in the first pass and nanomechanical characterization is performed in the second pass. For electrical characterization, we discuss frequency mixing based electrostatic imaging that provides higher resolution and suppressed background electrical potential mapping. Also a sample modulated surface potential technique is demonstrated for mapping conductivity of 2D materials.
  • Probing Physical Properties at the Nanoscale

    Probing Physical Properties at the Nanoscale

    University of Pennsylvania ScholarlyCommons Departmental Papers (MSE) Department of Materials Science & Engineering June 2008 Probing Physical Properties at the Nanoscale Matthew J. Brukman University of Pennsylvania Dawn A. Bonnell University of Pennsylvania, [email protected] Follow this and additional works at: https://repository.upenn.edu/mse_papers Recommended Citation Brukman, M. J., & Bonnell, D. A. (2008). Probing Physical Properties at the Nanoscale. Retrieved from https://repository.upenn.edu/mse_papers/152 Reprinted from Physics Today, Volume 61, Issue 6, June 2008. Publisher URL: http://scitation.aip.org/journals/doc/PHTOAD-ft/vol_61/iss_6/36_1.shtml This paper is posted at ScholarlyCommons. https://repository.upenn.edu/mse_papers/152 For more information, please contact [email protected]. Probing Physical Properties at the Nanoscale Abstract Everyday devices ranging from computers and cell phones to the LEDs inside traffic lights exploit quantum mechanics and rely on precisely controlled structures and materials to function optimally. Indeed, the goal in device fabrication is to control the structure and composition of materials, often at the atomic scale, and thereby fine-tune their properties in the service of ever-more-sophisticated technology. Researchers have imaged the structures of materials at atomic scales for nearly half a century, often using electrons, x rays, or atoms on sharp tips (see the article by Tien Tsong in PHYSICS TODAY, March 2006, page 31). The ability to survey properties of the materials has proven more challenging. In recent years, however, advances in the development of scanning probe microscopy have allowed researchers not only to image a surface, but also to quantify its local characteristics— often with a resolution finer than 10 nm.
  • An Overview of the State of Chinese Nanoscience and Technology

    An Overview of the State of Chinese Nanoscience and Technology

    SMALL SCIENCE IN BIG CHINA An overview of the state of Chinese nanoscience and technology. Conducted in collaboration between Springer Nature, the National Center for Nanoscience and Technology, China, and the National Science Library of the Chinese Academy of Sciences. Ed Gerstner The National Center for Nanoscience and Springer Nature, China Minghua Liu Technology, China National Center for The National Center for Nanoscience and Technology, China (NCNST) was established in December 2003 by the Nanoscience and Chinese Academy of Science (CAS) and the Ministry of Education as an institution dedicated to fundamental and Technology, China applied research in the field of nanoscience and technology, especially those with important potential applications. Xiangyang Huang NCNST is operated under the supervision of the Governing Board and aims to become a world-class research National Science Library, centre, as well as public technological platform and young talents training centre in the field, and to act as an Chinese Academy of important bridge for international academic exchange and collaboration. Sciences The NCNST currently has three CAS Key Laboratories: the CAS Key Laboratory for Biological Effects of Yingying Zhou Nanomaterials & Nanosafety, the CAS Key Laboratory for Standardization & Measurement for Nanotechnology, Nature Research, Springer and the CAS Key Laboratory for Nanosystem and Hierarchical Fabrication. Besides, there is a division of Nature, China nanotechnology development, which is responsible for managing the opening and sharing of up-to-date instruments and equipment on the platform. The NCNST has also co-founded 19 collaborative laboratories with Zhiyong Tang Tsinghua University, Peking University, and CAS. National Center for The NCNST has doctoral and postdoctoral education programs in condensed matter physics, physical Nanoscience and chemistry, materials science, and nanoscience and technology.