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5th Workshop on Specialty Optical Fibers and Their Applications, WSOF 2017

作者： Ballato, J. Dragic, P.D. Cavillon, M. Kucera, C.J. Hawkins, T.W. Department of Materials Science and Engineering Clemson University ClemsonSC United States Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign UrbanaIL United States

Optical nonlinearities limit power scaling in high energy fiber-based laser systems. Tomitigate these effects, a materials approach is employed utilizing intrinsically low nonlinearityoxyfluoride glasses in a simple c... 详细信息

关键词： Glass

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Software-Defined Metasurface Paradigm: Concept, Challenges, Prospects

Software-Defined Metasurface Paradigm: Concept, Challenges, ...

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International Congress on Advanced Electromagnetic materials in Microwaves and Optics (METAmaterials)

作者： A. Pitilakis A.C. Tasolamprou C. Liaskos F. Liu O. Tsilipakos X. Wang M.S. Mirmoosa K. Kossifos J. Georgiou A. Pitsilides N.V. Kantartzis S. Ioannidis E.N. Economou M. Kafesaki S.A. Tretyakov C.M. Soukoulis Department of Electrical and Computer Engineering Aristotle University of Thessaloniki Thessaloniki Greece Foundation for Research and Technology Hellas Crete Greece Department of Electronics and Nanoengineering Aalto University Espoo Finland Department of Electrical and Computer Engineering University of Cyprus Nicosia Cyprus Department of Computer Science University of Cyprus Nicosia Cyprus Department of Materials Science and Technology University of Crete Crete Greece Ames Laboratory and Department of Physics and Astronomy Iowa State University Ames Iowa USA

HyperSurfaces (HSFs) are devices whose electromagnetic (EM) behavior is software- driven, i.e., it can be defined programmatically. The key components of this emerging technology are the metasurfaces, artificial layered materials whose EM properties depend on their internal subwavelength structuring. HSFs merge metasurfaces with a network of miniaturized custom electronic controllers, the nanonetwork, in an integrated scalable hardware platform. The nanonetwork receives external programmatic commands expressing the desired end-functionality and appropriately alters the metasurface configuration thus yielding the respective EM behavior for the HSF. In this work, we will present all the components of the HSF paradigm, as well as highlight the underlying challenges and future prospects.

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Silicon/polypyrrole nanocomposite wrapped with graphene for lithium ion anodes

Silicon/polypyrrole nanocomposite wrapped with graphene for ...

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MRS Advances

作者： Li, Changling Liu, Chueh Mutlu, Zafer Yan, Yiran Ahmed, Kazi Ozkan, Mihri Ozkan, Cengiz S. Materials Science and Engineering Program University of California RiversideCA92521 United States Department of Electrical and Computer Engineering University of California RiversideCA92521 United States Department of Mechanical Engineering University of California RiversideCA92521 United States

Herein, silicon nanoparticles (SiNPs) are coated with conducting hydrogel and wrapped with reduced graphene oxide (rGO) sheets via a facile and scalable solution-based sol-gel process. The in-situ polymerized polypyrrole (PPy) hydrogel forms an interconnected three-dimensional (3D) fiber matrix. Amine and hydroxyl groups from the hydrogel assist the encapsulation of the SiNPs through hydrogen bonding. The electro-conductive PPy fiber network and the wrapping of rGO offer efficient electron and ion transport pathways. The PPy/SiNPs/rGO electrodes can produce highly reversible capacities of 1312, 1285 and 1066 mAh g-1 at 100, 250 and 500 cycles at a current density of 2.1 A g-1, respectively. Copyright © materials Research Society 2017.

关键词： Polypyrroles

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Multimodal epidermal devices for hydration monitoring

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Microsystems & Nanoengineering 2017年第1期3卷 267-277页

作者： Siddharth Krishnan Yunzhou Shi R.Chad Webb Yinji Ma Philippe Bastien Kaitlyn E.Crawford Ao Wang Xue Feng Megan Manco Jonas Kurniawan Edward Tir Yonggang Huang Guive Balooch Rafal M.Pielak John A.Rogers Department of Materials Science and Engineering Frederick Seitz Materials Research LaboratoryUniversity of Illinois at Urbana-ChampaignUrbanaIL 61801USA Department of Materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA L’Oreal Tech Incubator California Research Center953 Indiana StreetSan FranciscoCA 94107USA Department of Civil and Environmental Engineering Mechanical EngineeringMaterials Science and EngineeringNorthwestern UniversityEvanstonIL 60208USA L’Oréal Research and Innovation 1 Avenue Eugène SchullerAulnay sous Bois 93601France Department of Engineering Mechanics Center for Mechanics and MaterialsTsinghua UniversityBeijing 100084China L’Oréal Early Clinical 133 Terminal AvenueClarkNJ 07066USA Departments of Materials Science and Engineering Biomedical EngineeringChemistryMechanical EngineeringElectrical Engineering and Computer Scienceand Neurological SurgeryCenter for Bio-Integrated ElectronicsSimpson Querrey Institute for Nano/biotechnologyNorthwestern UniversityEvanstonIL 60208USA

Precise,quantitative in vivo monitoring of hydration levels in the near surface regions of the skin can be useful in preventing skinbased pathologies,and regulating external *** we introduce multimodal sensors with important capabilities in this context,rendered in soft,ultrathin,‘skin-like’formats with numerous advantages over alternative technologies,including the ability to establish intimate,conformal contact without applied pressure,and to provide spatiotemporally resolved data on both electrical and thermal transport properties from sensitive regions of the *** in vitro studies and computational models establish the underlying measurement principles and associated approaches for determination of temperature,thermal conductivity,thermal diffusivity,volumetric heat capacity,and electrical impedance using simple analysis *** studies on 20 patients subjected to a variety of external stimuli validate the device operation and allow quantitative comparisons of measurement capabilities to those of existing state-of-the-art tools.

关键词： epidermal electronics hydration monitoring thermal characterization

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Mechanisms of Ultrafast Charge Separation in a PTB7/Monolayer MoS2 van der Waals Heterojunction

arXiv

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arXiv 2018年

作者： Zhong, Chengmei Sangwan, Vinod K. Wang, Chen Bergeron, Hadallia Hersam, Mark C. Weiss, Emily A. Department of Chemistry Northwestern University EvanstonIL60208-3113 United States Department of Materials Science and Engineering Northwestern University EvanstonIL60208-3113 United States Department of Electrical Engineering and Computer Science Northwestern University EvanstonIL60208-3113 United States

Mixed-dimensional van der Waals heterojunctions comprising polymer and two-dimensional (2D) semiconductors have many characteristics of an ideal charge separation interface for optoelectronic and photonic applications. However, the photoelectron dynamics at polymer-2D semiconductor heterojunction interfaces are currently not sufficiently understood to guide the optimization of devices for these applications. This manuscript is a report of a systematic exploration of the time-dependent photophysical processes that occur upon photoexcitation of a type-II heterojunction between the polymer PTB7 and monolayer MoS2. In particular, photoinduced electron transfer from PTB7 to electronically hot states of MoS2 occurs in less than 250 fs. This process is followed by a slower (1-5 ps) exciton diffusion-limited electron transfer from PTB7 to MoS2 with a yield of 58%, and a sub-3-ps photoinduced hole transfer from MoS2 to PTB7. The equilibrium between excitons and polaron pairs in PTB7 determines the charge separation yield, whereas the 3-4 ns lifetime of photogenerated carriers is limited by MoS2 defects. Overall, this work elucidates the mechanisms of ultrafast charge carrier dynamics at PTB7-MoS2 interfaces, which will inform ongoing efforts to exploit polymer-2D semiconductor heterojunctions for photovoltaic and photodetector applications. Copyright © 2018, The Authors. All rights reserved.

关键词： Molybdenum compounds

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Measurements of inclusive and differential cross sections for the Higgs boson production and decay to four-leptons in proton-proton collisions at s = 13 TeV

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Journal of High Energy Physics 2023年第8期2023卷 40页

作者： Hayrapetyan, A. Tumasyan, A. Adam, W. Andrejkovic, J.W. Bergauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Hussain, P.S. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Schieck, J. Schöfbeck, R. Schwarz, D. Sonawane, M. Templ, S. Waltenberger, W. Wulz, C.-E. Darwish, M.R. Janssen, T. Kello, T. Van Mechelen, P. Bols, E.S. D’Hondt, J. De Moor, A. Delcourt, M. El Faham, H. Lowette, S. Makarenko, I. Morton, A. Müller, D. Sahasransu, A.R. Tavernier, S. Van Putte, S. Vannerom, D. Clerbaux, B. Dansana, S. De Lentdecker, G. Favart, L. Hohov, D. Jaramillo, J. Lee, K. Mahdavikhorrami, M. Malara, A. Paredes, S. Pétré, L. Postiau, N. Thomas, L. Vanden Bemden, M. Vander Velde, C. Vanlaer, P. De Coen, M. Dobur, D. Knolle, J. Lambrecht, L. Mestdach, G. Rendón, C. Samalan, A. Skovpen, K. Tytgat, M. Van Den Bossche, N. Vermassen, B. Wezenbeek, L. Benecke, A. Bruno, G. Bury, F. Caputo, C. Delaere, C. Donertas, I.S. Giammanco, A. Jaffel, K. Jain, Sa. Lemaitre, V. Lidrych, J. Mastrapasqua, P. Mondal, K. Tran, T.T. Wertz, S. Alves, G.A. Coelho, E. Hensel, C. Moraes, A. Rebello Teles, P. Aldá Júnior, W.L. Alves Gallo Pereira, M. Barroso Ferreira Filho, M. Brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. Dos Santos Sousa, V. Fonseca De Souza, S. Martins, J. Mora Herrera, C. Mota Amarilo, K. Mundim, L. Nogima, H. Santoro, A. Silva Do Amaral, S.M. Sznajder, A. Thiel, M. Vilela Pereira, A. Bernardes, C.A. Calligaris, L. Fernandez Perez Tomei, T.R. Gregores, E.M. Mercadante, P.G. Novaes, S.F. Orzari, B. Padula, Sandra S. Aleksandrov, A. Antchev, G. Hadjiiska, R. Iaydjiev, P. Misheva, M. Shopova, M. Sultanov, G. Dimitrov, A. Ivanov, T. Litov, L. Pavlov, B. Petkov, P. Petrov, A. Shumka, E. Keshri, S. Thakur, S. Cheng, T. Guo, Q. Javaid, T. Mittal, M. Yuan, L. Bauer, G. Hu, Z. Yi, K. Chen, G.M. Chen, H.S. Chen, M. Iemmi, F. Jiang, C.H. Kapoor, A. Liao, H. Liu, Z.-A. Monti, F. Sharma, R. Song, J.N. Tao, J. Wang, J. Zhang, C. Zhang, H. Agapitos, A. Ba Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) — Fudan University Shanghai China Zhejiang University Zhejiang Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physics (CHEP-FU) Fayoum University El-Fayoum Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics

Measurements of the inclusive and differential fiducial cross sections for the Higgs boson production in the H → ZZ → 4ℓ (ℓ = e, μ) decay channel are presented. The results are obtained from the analysis of proton-proton collision data recorded by the CMS experiment at the CERN LHC at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138 fb⁻¹. The measured inclusive fiducial cross section is 2.73 ± 0.26 fb, in agreement with the standard model expectation of 2.86 ± 0.1 fb. Differential cross sections are measured as a function of several kinematic observables sensitive to the Higgs boson production and decay to four leptons. A set of double-differential measurements is also performed, yielding a comprehensive characterization of the four leptons final state. Constraints on the Higgs boson trilinear coupling and on the bottom and charm quark coupling modifiers are derived from its transverse momentum distribution. All results are consistent with theoretical predictions from the standard model. © The Author(s) 2023.

关键词： Hadron-Hadron Scattering Higgs Physics

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Luminescence of Eu^2＋ and Eu^2＋-Mn^2＋ in sodium scandium diphosphate NaScP2O7 crystal

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Journal of Rare Earths 2017年第5期35卷 453-459页

作者：张新民郑薇张宏志陈翠丽徐孝镇 School of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004 China Hunan Collaborative Innovation Center for Effective Utilizing of Wood & Bamboo Resource Changsha 410018 China Department of Physics and Interdisciplinary Program of Biomedical Mechanical & Electrical Engineering Pukyong National University Busan 608-737 Republic of Korea

In this work, the photoluminescence（PL） of NaScP2O7：Eu^2＋ and NaScP2O7：Eu^2＋,Mn^2＋ was investigated. Phase purity was checked using X-ray powder diffractometry（XRD）. PL excitation and emission spectra were recorded to elucidate the PL properties of NaScP2O7：Eu^2＋ and NaScP2O7：Eu^2＋,Mn^2＋. Furthermore, fluorescence lifetime measurements were performed. PL and lifetime measurements were carried out from 10 to 525 K. Moreover, the Eu^2＋ site occupation was discussed. It turned out that the incorporated Eu^2＋ ions substituted for Na＋ site and occupied two different sites. Temperature dependent PL measurements indicated the emission intensity decreased with increasing temperature due to temperature quenching in NaScP2O7：Eu^2＋. Fluorescence lifetimes of Eu^2＋ in NaScP2O7：Eu^2＋ almost did not change with a decay constant τ=~0.53 μs in the temperature range of 10–280 K, and then shortened due to temperature quenching. The luminescent lifetime reached ~0.05 μs at T=525 K. Finally, it was found that energy transfer occurred from Eu^2＋ to Mn^2＋ in co-doped NaScP2O7：Eu^2＋,Mn^2＋.

关键词： lifetime diffractometry luminescent diphosphate checked excitation incorporated decay elucidate luminescence

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Dressed excitons in carbon nanotubes

Dressed excitons in carbon nanotubes

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CLEO: QELS_Fundamental science, CLEO_QELS 2018

作者： Cong, Kankan Timothy Noe, G. Liu, Huaping Kataura, Hiromichi Kono, Junichiro Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Nanomaterials Research Institute National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki305-8565 Japan Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States

Ultrafast spectroscopy of semiconducting carbon nanotubes reveals transient modifications in the lowest exciton absorption peak. Below-gap excitation induces a blue-shift due to the optical Stark effect, while a Rabi ... 详细信息

ISBN: (纸本)9781943580422

关键词： Carbon nanotubes

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Characterization of Graphene Gate Electrodes for Metal-Oxide-Semiconductor Devices

Characterization of Graphene Gate Electrodes for Metal-Oxide...

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MRS Advances

作者： An, Yanbin Shekhawat, Aniruddh Behnam, Ashkan Pop, Eric Ural, Ant Department of Electrical and Computer Engineering University of Florida GainesvilleFL32611 United States Department of Materials Science and Engineering University of Florida GainesvilleFL32611 United States Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign UrbanaIL61801 United States

We fabricate and characterize metal-oxide-semiconductor (MOS) devices with graphene as the gate electrode, 5 or 10 nm thick silicon dioxide as the insulator, and silicon as the semiconductor substrate. We find that Fowler-Nordheim tunneling dominates the gate current for the 10 nm oxide device. We also study the temperature dependence of the tunneling current in these devices in the range 77 to 300 K and extract the effective tunneling barrier height as a function of temperature for the 10 nm oxide device. Furthermore, by performing high frequency capacitance-voltage measurements, we observe a local capacitance minimum under accumulation, particularly for the 5 nm oxide device. By fitting the data using numerical simulations based on the modified density of states of graphene in the presence of charged impurities, we show that this local minimum results from the quantum capacitance of graphene. These results provide important insights for the heterogeneous integration of graphene into conventional silicon technology. © 2017 materials Research Society.

关键词： Graphene

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Dressed Excitons in Carbon Nanotubes

Dressed Excitons in Carbon Nanotubes

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2018 Conference on Lasers and Electro-Optics, CLEO 2018

作者： Cong, Kankan Noe, G. Timothy Liu, Huaping Kataura, Hiromichi Kono, Junichiro Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Nanomaterials Research Institute National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki305-8565 Japan Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States

ISBN: (纸本)9781943580422

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