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Symposium on Ionic Conducting Oxide Thin Films - 228th ECS Meeting

作者： Bae, J. An, J. Kim, Y.B. Gür, T.M. Prinz, F.B. Department of Mechanical Convergence Engineering Hanyang University Seoul133-791 Korea Republic of Program Seoul National University of Science and Technology Seoul139-743 Korea Republic of Institute of Nano Science and Technology Hanyang University Seoul133-791 Korea Republic of Department of Materials Science and Engineering Stanford University StanfordCA94305 United States Department of Mechanical Engineering Stanford University StanfordCA94305 United States

ISBN: (纸本)9781607685395

nanocrystalline materials often exhibit extraordinary electrical and electrochemical properties related to high density of grain boundaries. In this regard, we have investigated grain boundary structure and grain boundary's role for ionic transport and surface kinetics using atomic simulations, electrochemical analysis and spectroscopic/spectrometric experiments. Thereby, it was found that the segregation of dopants and vacancies near grain boundaries facilitates oxygen exchange while impeding cross-boundary ionic transport. © The Electrochemical Society.

关键词： Grain boundaries

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Characteristics of inversion, accumulation and junctionless mode silicon N-type and P-type bulk FinFETs with optimized 3-nm nano-fin structure

Characteristics of inversion, accumulation and junctionless ...

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IEEE Silicon nanoelectronics Workshop (SNW)

作者： Vasanthan Thirunavukkarasu Yi-Ruei Jhan Yan-Bo Liu Yung-Chun Wu Nano Science and Technology Program Taiwan and National Tsing Hua University Hsinchu Taiwan Department of Engineering and System Science National Tsing Hua University Hsinchu Taiwan

We for the first time evaluate the 3-nm gate Length (L G =3nm) inversion (IM) mode, accumulation (AC) mode and junctionless (JL) mode Silicon bulk FinFET performance with optimized nano-fin structure (F W =F H =3nm) using 3-D quantum transport device simulation. The excellent electrical characteristics of L G =3nm Si bulk FinFET are reported. The sub threshold slope values (SS~65mV/dec.) and drain-induced barrier lowering (DIBLTH| ~0.31 V. This research reveals that Moore's law can be scaled down to 3-nm nodes.

关键词： Silicon FinFETs Logic gates Semiconductor process modeling Mathematical model Doping Three-dimensional displays

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Topological Dirac surface states and superconducting pairing correlations in PbTaSe2

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Physical Review B 2016年第24期93卷 245130-245130页

作者： Tay-Rong Chang Peng-Jen Chen Guang Bian Shin-Ming Huang Hao Zheng Titus Neupert Raman Sankar Su-Yang Xu Ilya Belopolski Guoqing Chang BaoKai Wang Fangcheng Chou Arun Bansil Horng-Tay Jeng Hsin Lin M. Zahid Hasan Department of Physics National Tsing Hua University Hsinchu 30013 Taiwan Laboratory for Topological Quantum Matter and Spectroscopy (B7) Department of Physics Princeton University Princeton New Jersey 08544 USA Department of Physics National Taiwan University Taipei 10617 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 11529 Taiwan and National Taiwan University Taipei 10617 Taiwan Institute of Physics Academia Sinica Taipei 11529 Taiwan Department of Physics and Astronomy University of Missouri Columbia Missouri 65211 USA Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore 6 Science Drive 2 Singapore 117546 Department of Physics National University of Singapore 2 Science Drive 3 Singapore 117542 Princeton Center for Theoretical Science Princeton University Princeton New Jersey 08544 USA Center for Condensed Matter Sciences National Taiwan University Taipei 10617 Taiwan Department of Physics Northeastern University Boston Massachusetts 02115 USA

Superconductivity in topological band structures is a platform for realizing Majorana bound states and other exotic physical phenomena such as emergent supersymmetry. This potential nourishes the search for topological materials with intrinsic superconducting instabilities, in which Cooper pairing is introduced to electrons with helical spin texture such as the Dirac surface states of topological insulators, forming a time-reversal symmetric topological superconductor on the surface. We employ first-principles calculations and angle-resolved photoemission spectroscopy experiments to reveal that PbTaSe2, a noncentrosymmetric superconductor, possesses a nonzero Z2 topological invariant and fully spin-polarized Dirac surface states. Moreover, we analyze the phonon spectrum of PbTaSe2 to show how superconductivity emerges in this compound due to a stiffening of phonons by the Pb intercalation, which diminishes a competing charge-density-wave instability. By combining our findings on the topological band structure and the superconducting electron pairing, our work establishes PbTaSe2 as a stoichiometric superconductor with topological Dirac surface states. This type of intrinsic topological Dirac superconductors holds great promise for studying aspects of topological superconductors such as Majorana zero modes.

关键词： Majorana fermions Phonons Surface states Superconductors Topological insulators Angle-resolved photoemission spectroscopy First-principles calculations GGA

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A Zero‐Dimensional Organic Seesaw‐Shaped Tin Bromide with Highly Efficient Strongly Stokes‐Shifted Deep‐Red Emission

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Angewandte Chemie 2017年第4期130卷

作者： Chenkun Zhou Haoran Lin Hongliang Shi Yu Tian Chongin Pak Michael Shatruk Yan Zhou Peter Djurovich Mao‐Hua Du Biwu Ma Department of Chemical and Biomedical Engineering FAMU-FSU College of Engineering Tallahassee FL 32310 USA Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education) Department of Physics Beihang University Beijing 100191 China Materials Science and Engineering Program Florida State University Tallahassee FL 32306 USA Department of Chemistry and Biochemistry Florida State University Tallahassee FL 32306 USA Department of Chemistry University of Southern California Los Angeles CA 90089 USA Materials Science & Technology Division and Center for Radiation Detection Materials and Systems Oak Ridge National Laboratory Oak Ridge TN 37831 USA

The synthesis and characterization is reported of (C 9 NH 20 ) 2 SnBr 4 , a novel organic metal halide hybrid with a zero‐dimensional (0D) structure, in which individual seesaw‐shaped tin (II) bromide anions (SnBr 4 2− ) are co‐crystallized with 1‐butyl‐1‐methylpyrrolidinium cations (C 9 NH 20 + ). Upon photoexcitation, the bulk crystals exhibit a highly efficient broadband deep‐red emission peaked at 695 nm, with a large Stokes shift of 332 nm and a high quantum efficiency of around 46 %. The unique photophysical properties of this hybrid material are attributed to two major factors: 1) the 0D structure allowing the bulk crystals to exhibit the intrinsic properties of individual SnBr 4 2− species, and 2) the seesaw structure enabling a pronounced excited state structural deformation as confirmed by density functional theory (DFT) calculations.

关键词： Nulldimensionale Materialien Organisch-anorganische Hybride Stokes-Verschiebung Tiefrote Emission Wippenstruktur

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Correction: Liquid-capped encoded microcapsules for multiplex assays

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Lab on a chip 2017年第4期17卷 738页

作者： Younghoon Song Yunjin Jeong Taehong Kwon Daewon Lee Dong Yoon Oh Tae-Joon Park Junhoi Kim Jiyun Kim Sunghoon Kwon Institutes of Entrepreneurial BioConvergence Seoul National University Seoul 151-742 Republic of Korea. skwon@snu.ac.kr and Department of Electrical and Computer Science Seoul National University Seoul 151-742 Republic of Korea. Institutes of Entrepreneurial BioConvergence Seoul National University Seoul 151-742 Republic of Korea. skwon@snu.ac.kr and Interdisciplinary Program of Bioengineering Seoul National University Seoul 151-742 Republic of Korea. Nano Systems Institute Seoul National University Seoul 151-742 Republic of Korea. Department of Materials Science and Engineering Ulsan National Institute of Science and Technology Ulsan 44919 Republic of Korea. Institutes of Entrepreneurial BioConvergence Seoul National University Seoul 151-742 Republic of Korea. skwon@snu.ac.kr and Department of Electrical and Computer Science Seoul National University Seoul 151-742 Republic of Korea and Interdisciplinary Program of Bioengineering Seoul National University Seoul 151-742 Republic of Korea and Nano Systems Institute Seoul National University Seoul 151-742 Republic of Korea and Seoul National University Hospital Biomedical Research Institute Seoul National University Hospital Seoul 151-742 Republic of Korea and Quantamatrix Inc. Seoul 151-742 Republic of Korea.

Correction for 'Liquid-capped encoded microcapsules for multiplex assays' by Younghoon Song et al., Lab Chip, 2017, DOI: .

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Amplitude and phase modulation of light using fano-resonant meta-surfaces integrated with graphene

Amplitude and phase modulation of light using fano-resonant ...

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Integrated Photonics Research, Silicon and nanophotonics, IPRSN 2015

作者： Dabidian, Nima Kholmanov, Iskandar Khanikaev, Alexander B. Tatar, Kaya Trendafilov, Simeon Hossein Mousavi, S. Magnuson, Carl Ruoff, Rodney S. Shvets, Gennady Department of Physics Center for Nano and Molecular Science and Technology The University of Texas at Austin TX United States Department of Mechanical Engineering and Materials and Science Program The University of Texas at Austin AustinTX United States Department of Physics Queens College of The City University of New York QueensNY11367 United States Department of electrical engineering Center for microelectronic research The University of Texas at Austin AustinTX United States

We experimentally demonstrate amplitude and phase modulation in grapheneintegrated Fano-resonant plasmonic metasurfaces. Order of magnitude modulation depth is achieved in mid-IR. Strong coupling between trapped graph... 详细信息

ISBN: (纸本)9781557520005

关键词： Graphene

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Drumhead surface states and topological nodal-line fermions in TlTaSe2

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Physical Review B 2016年第12期93卷 121113(R)-121113(R)页

作者： Guang Bian Tay-Rong Chang Hao Zheng Saavanth Velury Su-Yang Xu Titus Neupert Ching-Kai Chiu Shin-Ming Huang Daniel S. Sanchez Ilya Belopolski Nasser Alidoust Peng-Jen Chen Guoqing Chang Arun Bansil Horng-Tay Jeng Hsin Lin M. Zahid Hasan Laboratory for Topological Quantum Matter and Spectroscopy (B7) Department of Physics Princeton University Princeton New Jersey 08544 USA Department of Physics National Tsing Hua University Hsinchu 30013 Taiwan Department of Physics University of California Berkeley California 94720 USA Princeton Center for Theoretical Science Princeton University Princeton New Jersey 08544 USA Condensed Matter Theory Center Department of Physics University of Maryland College Park Maryland 20742-4111 USA Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore 6 Science Drive 2 Singapore 117546 Department of Physics National University of Singapore 2 Science Drive 3 Singapore 117542 Department of Physics National Sun Yat-Sen University Kaohsiung 80424 Taiwan Department of Physics National Taiwan University Taipei 10617 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 11529 Taiwan and National Taiwan University Taipei 10617 Taiwan Institute of Physics Academia Sinica Taipei 11529 Taiwan Department of Physics Northeastern University Boston Massachusetts 02115 USA

A topological nodal-line semimetal is a state of matter with one-dimensional bulk nodal lines and two-dimensional so-called drumhead surface bands. Based on first-principles calculations and an effective k·p model, we theoretically propose the existence of topological nodal-line fermions in the ternary transition-metal chalcogenide TlTaSe2. The noncentrosymmetric structure and strong spin-orbit coupling give rise to spinful nodal-line bulk states which are protected by a mirror reflection symmetry of this compound. This is remarkably distinguished from other proposed nodal-line semimetals such as Cu3NPb(Zn) in which the nodal line exists only in the limit of vanishing spin-orbit coupling and thus is not as robust. In addition, we show that the drumhead surface states in TlTaSe2, which are associated with the topological nodal lines, exhibit an unconventional chiral spin texture and an exotic Lifshitz transition as a consequence of the linkage among multiple drumhead surface-state pockets.

关键词： Spin-orbit coupling Surface states Dichalcogenides Semimetals Topological materials Chiral symmetry First-principles calculations

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Coupling surface plasmon resonance of gold nanoparticles with slow-photon-effect of TiO2 photonic crystals for synergistically enhanced photoelectrochemical water splitting

Coupling surface plasmon resonance of gold nanoparticles wit...

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作者： Zhang, Xing Liu, Yang Lee, Shuit-Tong Yang, Shihe Kang, Zhenhui Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215123 China Nano Science and Technology Program Department of Chemistry Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong

The slow photon effect of a photonic crystal (PC) is a promising characteristic for tuning light-matter interactions through material structure designing. A TiO2 bi-layer structure photoanode was constructed by fabricating a TiO2 PC layer through a template-assisted sol-gel process on a TiO2 nanorod array (NR) layer. Gold nanoparticles (Au NPs) with an average size of about 10 nm were deposited in situ into the TiO2 bi-layer structure. The extended photoelectrochemical (PEC) water splitting activity in visible light was ascribed to the energetic hot electrons and holes that were generated in the Au NPs through the excitation and decay of surface plasmons. By alternating the characteristic pore size of the TiO2 PC layer, the slow photon region at the red edge of the photonic band gap could be purposely tuned to overlap with the strong localized surface plasmon resonance (SPR) region of Au NPs. The matching slow photon effect of TiO2 PC (with a characteristic pore size of 250 nm) intensified the SPR responses (central at 536 nm) of Au NPs. Consequently, more hot electrons were generated in the Au NPs and injected into the conduction band of TiO 2, resulting in improved PEC water splitting efficiency in the visible light region. Under simulated sunlight illumination, the photoconversion efficiency of the well matching Au/TiO2 photoanode approached 0.71%, which is one of the highest values ever reported in Au/TiO2 PEC systems. The work reported here provides support for designing coupling plasmonic nanostructures with PC-based materials to synergistically enhance PEC water splitting efficiency. This journal is © the Partner Organisations 2014.

关键词： Titanium dioxide

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The AFLOW fleet for materials discovery

arXiv

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arXiv 2017年

作者： Toher, Cormac Oses, Corey Hicks, David Gossett, Eric Rose, Frisco Nath, Pinku Usanmaz, Demet Ford, Denise C. Perim, Eric Calderon, Camilo E. Plata, Jose J. Lederer, Yoav Jahnátek, Michal Setyawan, Wahyu Wang, Shidong Xue, Junkai Rasch, Kevin Chepulskii, Roman V. Taylor, Richard H. Gomez, Geena Shi, Harvey Supka, Andrew R. Al Orabi, Rabih Al Rahal Gopal, Priya Cerasoli, Frank T. Liyanage, Laalitha Wang, Haihang Siloi, Ilaria Agapito, Luis A. Nyshadham, Chandramouli Hart, Gus L.W. Carrete, Jesús Legrain, Fleur Mingo, Natalio Zurek, Eva Isayev, Olexandr Tropsha, Alexander Sanvito, Stefano Hanson, Robert M. Takeuchi, Ichiro Mehl, Michael J. Kolmogorov, Aleksey N. Yang, Kesong D'Amico, Pino Calzolari, Arrigo Costa, Marcio De Gennaro, Riccardo Nardelli, Marco Buongiorno Fornari, Marco Levy, Ohad Curtarolo, Stefano Department of Mechanical Engineering and Materials Science Duke University DurhamNC27708 United States Center for Materials Genomics Duke University DurhamNC27708 United States Departamento de Química Física Universidad de Sevilla Sevilla41012 Spain Department of Physics NRCN P.O. Box 9001 Beer-Sheva84190 Israel Department of Materials Science and Engineering Massachusetts Institute of Technology MA02139 United States Department of Physics and Science of Advanced Materials Program Central Michigan University Mount PleasantMI48859 United States Science of Advanced Materials Program Central Michigan University Mount PleasantMI United States Solvay Design and Development of Functional Materials Department AXEL'ONE Collaborative Platform - Innovative Materials Saint Fons Cedex69192 France Department of Physics Department of Chemistry University of North Texas DentonTX76203 United States Department of Physics and Astronomy Brigham Young University ProvoUT84602 United States Institute of Materials Chemistry TU Wien ViennaA-1060 Austria Universite e Grenoble Alpes Grenoble38000 France CEA LITEN 17 Rue des Martyrs Grenoble38054 France Department of Chemistry State University of New York at Buffalo BuffaloNY14260 United States Laboratory for Molecular Modeling Division of Chemical Biology and Medicinal Chemistry UNC Eshelman School of Pharmacy University of North Carolina Chapel HillNC27599 United States School of Physics AMBER and CRANN Institute Trinity College Dublin 2 Ireland Department of Chemistry St. Olaf College NorthfieldMN55057 United States Center for Nanophysics and Advanced Materials University of Maryland College ParkMD20742 United States Department of Materials Science and Engineering University of Maryland College ParkMD20742 United States United States Naval Academy AnnapolisMD21402 United States Department of Physics Binghamton University State University of New York BinghamtonNY13902 United States Depart

The traditional paradigm for materials discovery has been recently expanded to incorporate substantial data driven research. With the intent to accelerate the development and the deployment of new technologies, the AFLOW Fleet for computational materials design automates high-throughput first principles calculations, and provides tools for data verification and dissemination for a broad community of users. AFLOW incorporates different computational modules to robustly determine thermodynamic stability, electronic band structures, vibrational dispersions, thermo-mechanical properties and more. The AFLOW data repository is publicly accessible online at ***, with more than 1.7 million materials entries and a panoply of queryable computed properties. Tools to programmatically search and process the data, as well as to perform online machine learning predictions, are also available. Copyright © 2017, The Authors. All rights reserved.

关键词： Calculations

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A study on a highly sensitive strain sensor based on rayleigh wave

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Transactions of the Korean Institute of Electrical Engineers 2014年第4期63卷 495-501页

作者： Lee, Ki Jung Jo, Minuk Fu, Chen Eun, Kyoungtae Oh, Haekwan Choa, Sung-Hoon Yang, Sang Sik Dept of Electrical and Computer Engineering Ajou University Korea Republic of Nano-IT Fusion Program Seoul National University of Science and Technology Korea Republic of Convergence Sensor Research Center Korea Electronics Technology Institute Korea Republic of

Piezoresistive-type, capacitive-type, and optical-type sensors have mainly been used for measuring a strain. However, in building a sensor network for remote monitoring using these conventional sensors there are disadvantages such as the complexity of a measuring system including wireless communication circuitry and high cost. In this paper, we demonstrates a highly-sensitive surface acoustic wave (SAW) strain sensor which is advantageous to harsh environments and wireless network. We designed and fabricated the SAW strain sensor. The SAW strain sensor attached on a specimen was tested with a tensile tester. The strain on the sensor surface was measured with a commercial strain gauge and compared with that obtained from strain analysis. The central frequency shift of the SAW sensor was measured with a network analyzer. The sensitivity of the SAW strain sensor is 134 Hz/μe which is high compared to previous results.

关键词： Finite element method

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