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Silicene, Silicene Derivatives, and Their Device Applications
Chemical Society Reviews Silicene, silicene derivatives, and their device applications Journal: Chemical Society Reviews Manuscript ID CS-REV-04-2018-000338.R1 Article Type: Review Article Date Submitted by the Author: 27-Jun-2018 Complete List of Authors: Molle, Alessandro; CNR-IMM, unit of Agrate Brianza Grazianetti, Carlo; CNR-IMM, unit of Agrate Brianza Tao, Li; The University of Texas at Autin, Microelectronics Research Center Taneja, Deepyanti; The University of Texas at Autin, Microelectronics Research Center Alam, Md Hasibul; The University of Texas at Autin, Microelectronics Research Center Akinwande, Deji; The University of Texas at Autin, Microelectronics Research Center Page 1 of 17 PleaseChemical do not Society adjust Reviews margins Chemical Society Reviews REVIEW Silicene, silicene derivatives, and their device applications Alessandro Molle,a Carlo Grazianetti,a,† Li Tao,b,† Deepyanti Taneja,c Md. Hasibul Alam,c and Deji c,† Received 00th January 20xx, Akinwande Accepted 00th January 20xx Silicene, the ultimate scaling of silicon atomic sheet in a buckled honeycomb lattice, represents a monoelemental class of DOI: 10.1039/x0xx00000x two-dimensional (2D) materials similar to graphene but with unique potential for a host of exotic electronic properties. www.rsc.org/ Nonetheless, there is a lack of experimental studies largely due to the interplay between material degradation and process portability issues. This Review highlights state-of-the-art experimental progress and future opportunities in synthesis, characterization, stabilization, processing and experimental device example of monolayer silicene and thicker derivatives. Electrostatic characteristics of Ag-removal silicene field-effect transistor exihibits ambipolar charge transport, corroborating with theoretical predictions on Dirac Fermions and Dirac cone in band structure. -
ICCS24 Book of Abstracts
ICCS24 24th International Conference on Composite Structures Faculty of Engineering, University of Porto, Portugal 14-16 June 2021 Book of Abstracts António J.M. Ferreira Carlos Santiuste Nicholas Fantuzzi Michele Bacciocchi Ana Neves ii Welcome Address The abstracts collected in this book represent the proceedings of the conference ICCS24 (24th International Conference on Composite Structures) , 14-16 June 2021. This book aims to help you to follow this Event in a timely and organized manner. Papers are selected by the organizing committee to be presented in virtual/phisical format. Such arrangement is due to the effects of the coronavirus COVID-19 pandemic. The event, held at FEUP-Faculty of Engineering, University of Porto (Portugal), follows the success of the first twenty-three editions of ICCS. As the previous ones, this event represents an opportunity for the composites community to discuss the latest advances in the various topics in composite materials and structures. Conference chairs António J.M. Ferreira, University of Porto, Portugal Carlos Santiuste, Universidad Carlos III de Madrid, Spain Nicholas Fantuzzi, University of Bologna, Italy Michele Bacciocchi, University of San Marino, San Marino Ana Neves, University of Porto, Portugal iii iv Contents Welcome Address iii Abstracts 1 Additive Manufacturing .................................1 Influence of Process Parameters in Fused Deposition Modeling for Fabrication of Continuous fiber reinforced PLA composites (Strahinja Milenković; Nenad Grujović; Cristiano Fragassa; Vukašin Slavković; Nikola Palić; Fatima Živić) ......1 Evaluating the recycling potential of additively manufactured carbon fiber rein- forced PA 6 (Lohr, Christoph; Trauth, Anna; Brück, Bastian; Leher, Sophia; Weiden- mann, Kay) .....................................2 Statistical-based optimization of mechanical performance in FFF-printed un- reinforced and short-carbon-fiber-reinforced PEEK (S. -
Call for Papers | 2022 MRS Spring Meeting
Symposium CH01: Frontiers of In Situ Materials Characterization—From New Instrumentation and Method to Imaging Aided Materials Design Advancement in synchrotron X-ray techniques, microscopy and spectroscopy has extended the characterization capability to study the structure, phonon, spin, and electromagnetic field of materials with improved temporal and spatial resolution. This symposium will cover recent advances of in situ imaging techniques and highlight progress in materials design, synthesis, and engineering in catalysts and devices aided by insights gained from the state-of-the-art real-time materials characterization. This program will bring together works with an emphasis on developing and applying new methods in X-ray or electron diffraction, scanning probe microscopy, and other techniques to in situ studies of the dynamics in materials, such as the structural and chemical evolution of energy materials and catalysts, and the electronic structure of semiconductor and functional oxides. Additionally, this symposium will focus on works in designing, synthesizing new materials and optimizing materials properties by utilizing the insights on mechanisms of materials processes at different length or time scales revealed by in situ techniques. Emerging big data analysis approaches and method development presenting opportunities to aid materials design are welcomed. Discussion on experimental strategies, data analysis, and conceptual works showcasing how new in situ tools can probe exotic and critical processes in materials, such as charge and heat transfer, bonding, transport of molecule and ions, are encouraged. The symposium will identify new directions of in situ research, facilitate the application of new techniques to in situ liquid and gas phase microscopy and spectroscopy, and bridge mechanistic study with practical synthesis and engineering for materials with a broad range of applications. -
High Surface Area Graphene Foams by Chemical Vapor Deposition
High Surface Area Graphene Foams by Chemical Vapor Deposition Simon Drieschner1, Michael Weber1, J¨orgWohlketzetter1, Josua Vieten1, Evangelos Makrygiannis1, Benno M. Blaschke1, Vittorio Morandi2, Luigi Colombo3, Francesco Bonaccorso4, and Jose A. Garrido5;6 1Walter Schottky Institut und Physik-Department, Technische Universit¨atM¨unchen, Am Coulombwall 4, 85748 Garching, Germany 2CNR-IMM via Gobetti 101, 40129 Bologna, Italy 3Analog Technology Development, Texas Instruments 13121 TI Blvd MS-367, Dallas, TX 75243, USA 4Istituto Italiano di Tecnologia, Graphene Labs Via Morego 30, 16163 Genova, Italy 5ICN2 { Catalan Institute of Nanoscience and Nanotechnology, Barcelona Institute of Science and Technology and CSIC, Campus UAB, 08193 Bellaterra, Spain 6ICREA, Instituci´oCatalana de Recerca i Estudis Avan¸cats,08070 Barcelona, Spain E-mail: [email protected] Abstract. Three-dimensional (3D) graphene-based structures combine the unique physical properties of graphene with the opportunity to get high electrochemically available surface area per unit of geometric surface area. Several preparation techniques have been reported to fabricate 3D graphene-based macroscopic structures for energy storage applications such as supercapacitors. Although reaserch has been focused so far on achieving either high specific capacitance or high volumetric capacitance, much less attention has been dedicated to obtain high specific and high volumetric capacitance simultaneously. Here, we present a facile technique to fabricate graphene foams (GF) of high crystal quality with tunable pore size grown by chemical vapor deposition. We exploited porous sacrificial templates prepared by sintering nickel and copper metal powders. Tuning the particle size of the metal powders and the growth temperature allow fine control of the resulting pore size of the 3D graphene-based structures smaller than 1 µm. -
Preparation of a Novel Structured Catalyst Based on Aligned Carbon
Catalysis Today 110 (2005) 47–52 www.elsevier.com/locate/cattod Preparation of a novel structured catalyst based on aligned carbon nanotube arrays for a microchannel Fischer-Tropsch synthesis reactor Ya-huei Chin, Jianli Hu, Chunshe Cao, Yufei Gao, Yong Wang * Institute of Interfacial Catalysis, Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, WA 99354, USA Available online 13 October 2005 Abstract A novel microstructured catalyst based on aligned multiwall carbon nanotube arrays was synthesized and tested for Fischer-Tropsch synthesis (FTS) reaction in a microchannel reactor. Fabrication of such a structured catalyst first involved metal organic chemical vapor deposition (MOCVD) of a dense Al2O3 thin film over FeCrAlY foam to enhance the adhesion between ceramic-based catalyst and metal substrate. Aligned multiwall carbon nanotubes were deposited uniformly over the substrate by controlled catalytic decomposition of ethylene. These nanotube bundles were directly attached to FeCrAlY foam through a submicron layer of oxide thin film. Coating the outer surfaces of these nanobundles with an active catalyst layer forms a unique hierarchical structure with fine interstitials between the carbon nanotube bundles. The microstuctural catalyst possessed superior thermal conductivity inherent from carbon nanotube, which allows efficient heat removal from catalytic active sites during exothermic FTS reaction. The concept was tested and demonstrated in a microchannel fixed bed FTS reactor. FTS turn-over activity was found to enhance by a factor of four owing to potential improvement in mass transfer in the unique microstructure. Furthermore, improved temperature control with the carbon nanotube arrays also allows the Fischer-Tropsch synthesis being operated at temperatures as high as 265 8C without reaction runaway. -
Application of Silicene, Germanene and Stanene for Na Or Li Ion Storage: a Theoretical Investigation
Application of silicene, germanene and stanene for Na or Li ion storage: A theoretical investigation Bohayra Mortazavi*,1, Arezoo Dianat2, Gianaurelio Cuniberti2, Timon Rabczuk1,# 1Institute of Structural Mechanics, Bauhaus-Universität Weimar, Marienstr. 15, D-99423 Weimar, Germany. 2Institute for Materials Science and Max Bergman Center of Biomaterials, TU Dresden, 01062 Dresden, Germany Abstract Silicene, germanene and stanene likely to graphene are atomic thick material with interesting properties. We employed first-principles density functional theory (DFT) calculations to investigate and compare the interaction of Na or Li ions on these films. We first identified the most stable binding sites and their corresponding binding energies for a single Na or Li adatom on the considered membranes. Then we gradually increased the ions concentration until the full saturation of the surfaces is achieved. Our Bader charge analysis confirmed complete charge transfer between Li or Na ions with the studied 2D sheets. We then utilized nudged elastic band method to analyze and compare the energy barriers for Li or Na ions diffusions along the surface and through the films thicknesses. Our investigation findings can be useful for the potential application of silicene, germanene and stanene for Na or Li ion batteries. Keywords: Silicene; germanene; stanene; first-principles; Li ions; *Corresponding author (Bohayra Mortazavi): [email protected] Tel: +49 157 8037 8770, Fax: +49 364 358 4511 #[email protected] 1. Introduction The interest toward two-dimensional (2D) materials was raised by the great success of graphene [1–3]. Graphene is a zero-gap semiconductor that present outstanding mechanical [4] and heat conduction [5] properties, surpassing all known materials. -
Elastomeric Foam Systems for Novel Mechanical Properties and Soft
ELASTOMERIC FOAM SYSTEMS FOR NOVEL MECHANICAL PROPERTIES AND SOFT ROBOT PROPRIOCEPTION A Dissertation Presented to the Faculty of the Graduate School of Cornell University In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy by Ilse Mae Van Meerbeek December, 2018 © 2018 Ilse Mae Van Meerbeek ELASTOMERIC FOAM SYSTEMS FOR NOVEL MECHANICAL PROPERTIES AND SOFT ROBOT PROPRIOCEPTION Ilse Mae Van Meerbeek, Ph.D. Cornell University 2018 Soft materials have enabled the fabrication of novel robots with interesting and complex capabilities. The same properties that have enabled these innovations—continuous deformation, elasticity, and low elastic moduli—are the same properties that make soft robotics challenging. Soft robots have limited load-bearing capabilities, making it difficult to use them when manipulation of heavy objects is needed, for example. The ability for soft robots to deform continuously makes it difficult to model and control them, as well as impart them with adequate proprioception. This dissertation presents work that attempts to address these two main challenges by increasing load-bearing ability and improving sensing. I present a composite material comprising an open-cell foam of silicone rubber infiltrated with a low melting-temperature metal. The composite has two stiffness regimes—a rigid regime at room temperature dominated by the solid metal, and an elastomeric regime at above the melting temperature of the metal, which is dictated by the silicone. I characterize the mechanical properties of the composite material and demonstrate its ability to hold different shapes, self-heal, and actuate using shape memory. In an advance for soft robotic sensing, I present a silicone foam embedded with optical fibers that can detect when it is being bent or twisted. -
Theoretical Study of a New Porous 2D Silicon-Filled Composite Based on Graphene and Single-Walled Carbon Nanotubes for Lithium-Ion Batteries
applied sciences Article Theoretical Study of a New Porous 2D Silicon-Filled Composite Based on Graphene and Single-Walled Carbon Nanotubes for Lithium-Ion Batteries Dmitry A. Kolosov 1 and Olga E. Glukhova 1,2,* 1 Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia; [email protected] 2 Laboratory of Biomedical Nanotechnology, I.M. Sechenov First Moscow State Medical University, Trubetskaya street 8-2, 119991 Moscow, Russia * Correspondence: [email protected]; Tel.: +7-84-5251-4562 Received: 24 July 2020; Accepted: 18 August 2020; Published: 21 August 2020 Abstract: The incorporation of Si16 nanoclusters into the pores of pillared graphene on the base of single-walled carbon nanotubes (SWCNTs) significantly improved its properties as anode material of Li-ion batteries. Quantum-chemical calculation of the silicon-filled pillared graphene efficiency found (I) the optimal mass fraction of silicon (Si)providing maximum anode capacity; (II) the optimal Li: C and Li: Si ratios, when a smaller number of C and Si atoms captured more amount of Li ions; and (III) the conditions of the most energetically favorable delithiation process. For 2D-pillared graphene with a sheet spacing of 2–3 nm and SWCNTs distance of ~5 nm the best silicon concentration in pores was ~13–18 wt.%. In this case the value of achieved capacity exceeded the graphite anode one by 400%. Increasing of silicon mass fraction to 35–44% or more leads to a decrease in the anode capacity and to a risk of pillared graphene destruction. It is predicted that this study will provide useful information for the design of hybrid silicon-carbon anodes for efficient next-generation Li-ion batteries. -
Evidence of Silicene in Honeycomb Structures of Silicon on Ag(111)
Letter pubs.acs.org/NanoLett Evidence of Silicene in Honeycomb Structures of Silicon on Ag(111) † † † ‡ † † † † Baojie Feng, Zijing Ding, Sheng Meng, Yugui Yao, , Xiaoyue He, Peng Cheng, Lan Chen,*, † and Kehui Wu*, † Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China ‡ School of Physics, Beijing Institute of Technology, Beijing 100081, China ABSTRACT: In the search for evidence of silicene, a two- dimensional honeycomb lattice of silicon, it is important to obtain a complete picture for the evolution of Si structures on Ag(111), which is believed to be the most suitable substrate for growth of silicene so far. In this work we report the finding and evolution of several monolayer superstructures of silicon on Ag(111), depend- ing on the coverage and temperature. Combined with first- principles calculations, the detailed structures of these phases have been illuminated. These structures were found to share common building blocks of silicon rings, and they evolve from a fragment of silicene to a complete monolayer silicene and multilayer silicene. Our results elucidate how silicene forms on Ag(111) surface and provides methods to synthesize high-quality and large- scale silicene. KEYWORDS: Silicene, Ag(111), scannning tunneling microscopy, molecular beam epitaxy, first-principles calculation ith the development of the semiconductor industry of silicene and optimizing the preparation procedure for W toward a smaller scale, the rich quantum phenomena in growing high-quality silicene films, it is important to build a low-dimensional systems may lead to new concepts and complete understanding of the formation mechanism and ground-breaking applications. In the past decade graphene growth dynamics of possible silicon structures on Ag(111), has emerged as a low-dimensional system for both fundamental which is currently believed to be the best substrate for growing research and novel applications including electronic devices, silicene. -
Al-Si-Mg Foam Produced by 3D Printer Abstract Al89
Adıyaman University Journal of Science ADYUSCI dergipark.gov.tr/adyusci 8 (1) (2018) 13-23 Al-Si-Mg Foam Produced by 3D Printer Selçuk ATALAY1, Nevzat BAYRİ2, Harun KAYA1, Tekin İZGİ1,*, V. Serkan KOLAT1 1İnönü University, Faculty of Arts and Sciences, Department of Physics, 44280 Malatya, Türkiye, [email protected] , [email protected] , [email protected] , [email protected] 2İnönü University, Faculty of Education, Department of Science Education, 44280 Malatya, Türkiye, [email protected] Abstract Al89.5Si10Mg0.5 metallic foam was produced by 3D metal printer. The design pattern has a triangular-like structure and it consists of aligned wires. The structure was designed so that the distance between wires is 1 mm and the wire diameter is 1.2 mm. X-ray results showed that sample has a cubic structure with nm grains. Also, detailed element mapping indicated that sample has a homogenous distribution state of the reinforcement throughout the Al matrix, which also a clear indication of single phase. Compressive stress–strain curves shows the typical compressive behaviour of metallic foams consists of a narrow linear elastic area followed by a plateau regime and then a sharp increase. Keywords: Metallic foam, 3D printer, Compressive stress. 3D Yazıcı Tarafından Üretilen Al-Si-Mg Köpük Özet Al89.5Si10Mg0.5 metalik köpük 3D metal yazıcı ile üretildi. Tasarım deseni üçgen benzeri bir yapıya sahiptir ve hizalanmış tellerden oluşur. Yapı, teller arasındaki mesafe 1 mm ve tel çapı 1.2 mm olacak şekilde tasarlanmıştır. X-ışını sonuçları numunenin nm * Corresponding Author Received: 25 January 2018 Accepted: 04 June 2018 tanecikli kübik bir yapıya sahip olduğunu gösterdi. -
JRC Horizon Scanning on Dual-Use Civil and Military Research
JRC horizon scanning on dual-use civil and military research G. Bordin, M. Hristova and E. Luque-Perez 2020 EUR 30301 EN This publication is a Science for Policy report by the Joint Research Centre (JRC), the European Commission’s science and knowledge service. It aims to provide evidence-based scientific support to the European policymaking process. The scientific output expressed does not imply a policy position of the European Commission. Neither the European Commission nor any person acting on behalf of the Commission is responsible for the use that might be made of this publication. For information on the methodology and quality underlying the data used in this publication for which the source is neither Eurostat nor other Commission services, users should contact the referenced source. The designations employed and the presentation of material on the maps do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Contact information Name: Guy Bordin, Mayya Hristova and Encarnación Luque-Perez Address: Rue du Champ de Mars 21, 1049 Brussels, Belgium Email: [email protected]; [email protected]; [email protected] EU Science Hub https://ec.europa.eu/jrc JRC120638 EUR 30301 EN PDF ISBN 978-92-76-20775-7 ISSN 1831-9424 doi:10.2760/47988 Luxembourg: Publications Office of the European Union, 2020 © European Union, 2020 The reuse policy of the European Commission is implemented by the Commission Decision 2011/833/EU of 12 December 2011 on the reuse of Commission documents (OJ L 330, 14.12.2011, p. -
Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded Within Aluminum Open-Cell Foam
metals Article Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam Susana C. Pinto 1, Paula A. A. P. Marques 1 , Romeu Vicente 2, Luís Godinho 3 and Isabel Duarte 1,* 1 Department of Mechanical Engineering, TEMA, University of Aveiro, 3810-193 Aveiro, Portugal; [email protected] (S.C.P.); [email protected] (P.A.A.P.M.) 2 Department of Civil Engineering, RISCO, University of Aveiro, 3810-193 Aveiro, Portugal; [email protected] 3 Department of Civil Engineering, ISISE, University of Coimbra, 3030-788 Coimbra, Portugal; [email protected] * Correspondence: [email protected]; Tel.: +350-234-370-830 Received: 15 May 2020; Accepted: 5 June 2020; Published: 9 June 2020 Abstract: This paper focuses on the development of hybrid structures containing two different classes of porous materials, nanocomposite foams made of polyurethane combined with graphene-based materials, and aluminum open-cell foams (Al-OC). Prior to the hybrid structures preparation, the nanocomposite foam formulation was optimized. The optimization consisted of studying the effect of the addition of graphene oxide (GO) and graphene nanoplatelets (GNPs) at different loadings (1.0, 2.5 and 5.0 wt%) during the polyurethane foam (PUF) formation, and their effect on the final nanocomposite properties. Globally, the results showed enhanced mechanical, acoustic and fire-retardant properties of the PUF nanocomposites when compared with pristine PUF. In a later step, the hybrid structure was prepared by embedding the Al-OC foam with the optimized nanocomposite formulation (prepared with 2.5 wt% of GNPs (PUF/GNPs2.5)). The process of filling the pores of the Al-OC was successfully achieved, with the resulting hybrid structure retaining low thermal conductivity values, around 0.038 W m 1 K 1, and presenting an improved sound absorption · − · − coefficient, especially for mid to high frequencies, with respect to the individual foams.