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Cover Picture: Laser-scribed Graphene Electrodes as an Electrochemical Immunosensing Platform for Cancer Biomarker ‘eIF3d’ (Electroanalysis 4/2021)

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Electroanalysis 2021年第4期33卷

作者： Simge Balaban Tutku Beduk Ceren Durmus Eda Aydindogan Khaled Nabil Salama Suna Timur Department of Biochemistry Faculty of Science Ege University 35100 Bornova Izmir Turkey Sensors Lab Advanced Membranes and Porous Materials Center Computer Electrical and Mathematical Science and Engineering Division King Abdullah University of Science and Technology (KAUST) 23955-6900 Thuwal Saudi Arabia Central Research Testing and Analysis Laboratory Research and Application Center Ege University 35100 Bornova Izmir Turkey

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Solar Evaporation: Solar Driven Interfacial Steam Generation Derived from Biodegradable Luffa Sponge (Adv. Sustainable Syst. 5/2021)

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Advanced Sustainable Systems 2021年第5期5卷

作者： Ahmed Mortuza Saleque Sainan Ma Safayet Ahmed Mohammad Ismail Hossain Wayesh Qarony Yuen Hong Tsang Department of Applied Physics and Materials Research Center The Hong Kong Polytechnic University Kowloon Hung Hom Hong Kong Shenzhen Research Institute The Hong Kong Polytechnic University Shenzhen Guangdong 518057 P. R. China Ningbo Research Institute Zhejiang University Ningbo 315100 P. R. China Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong Department of Electrical and Computer Engineering University of California Davis CA 95616 USA

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Hole mobility of strained GaN from first principles

arXiv

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arXiv 2019年

作者： Poncé, Samuel Jena, Debdeep Giustino, Feliciano Department of Materials University of Oxford Parks Road OxfordOX1 3PH United Kingdom School of Electrical and Computer Engineering Cornell University IthacaNY14853 United States Department of Material Science and Engineering Cornell University IthacaNY14853 United States

Nitride semiconductors are ubiquitous in optoelectronic devices such as LEDs and Blu-Ray optical disks. A major limitation for further adoption of GaN in power electronics is its low hole mobility. In order to address this challenge, here we investigate the phonon-limited mobility of wurtzite GaN using the ab initio Boltzmann transport formalism, including all electron-phonon scattering processes, spin-orbit coupling, and many-body quasiparticle band structures. We demonstrate that the mobility is dominated by acoustic deformation-potential scattering, and we predict that the hole mobility can significantly be increased by lifting the split-off hole states above the light and heavy holes. This can be achieved by reversing the sign of the crystal-field splitting via strain or via coherent excitation the A1 optical phonon through ultrafast infrared optical pulses. Copyright © 2019, The Authors. All rights reserved.

关键词： Gallium nitride

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Open-source matlab-based graphical user interface (gui) for computer control of microscopes using μmanager

arXiv

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arXiv 2019年

作者： Pham, Quang Long Chege, David Dijamco, Timothy Surblyte, Migle Naik, Akshay Campbell, Kolawole Tong, Nhat-Anh-Nguyen Voronov, Roman Otto H. York Department of Chemical and Materials Engineering Newark College of Engineering New Jersey Institute of Technology NewarkNJ07102 United States Department of Electrical and Computer Engineering Newark College of Engineering New Jersey Institute of Technology NewarkNJ07102 United States Department of Computer Science Ying Wu College of Computing New Jersey Institute of Technology NewarkNJ07102 United States

Live time-lapse microscopy is essential for a wide range of biological applications. Software-based automation is the gold standard for the operation of hardware accessories necessary for image acquisition. Given that current software packages are neither affordable nor open to complex structured programming, we have developed a Matlab-based graphical user interface (GUI) that is fundamentally accessible while providing limitless avenues for further customization. The GUI simultaneously communicates with the open-source, cross-functional platform -ÝManager for controlling hardware for time-lapse image acquisition and with other software for image processing. The use of the GUI is demonstrated through an 18-hour cell migration experiment. The results suggest that the GUI can generate high-quality, high-throughput time-lapse images. The core code behind the GUI is open-source so that it can be modified and upgraded. Therefore, it benefits the researchers worldwide by providing them a fundamental yet functional template to add in advanced features specific to their needs, such as additional non-microscopy hardware parts and software packages supported by the Matlab software. Copyright © 2019, The Authors. All rights reserved.

关键词： MATLAB

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Enhanced detection of volatile organic compounds (VOCs) by caffeine modified carbon nanotube junctions

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Nano-Structures and Nano-Objects 2020年 24卷

作者： Turner, Alton McCoy, Tyler Cao, Wei Karoui, Abdennaceur Maswadeh, Waleed M. Vlahovic, Branislav Elsayed-Ali, Hani E. Daniel, Brenna Castro, Mickael Sadasivuni, Kishor Kumar Elahi, Mehran Adedeji, Adetayo Kumar, Bijandra Department of Mathematics Computer Science and Engineering Technology Elizabeth City State University Elizabeth City 27909 NC United States Old Dominion University Department of Electrical and Computer Engineering 12050 Jefferson Ave. Newport News 23606 VA United States North Carolina Central University CREST Department of Mathematics and Physics 1801 Fayetteville Street Durham 27707 NC United States US Army RDECOM ECBC Edgewood MD United States IRDL UMR CNRS 6027 Université de Bretagne Sud Lorient France Center for Advanced Materials Qatar University Qatar

Detection of vapor phase analytes and gas molecules is primarily essential for numerous applications including medical diagnostic, environmental monitoring, chemical threat detection, food quality control, and chemical warfare agents. Here, we developed Caffeine functionalized carbon nanotubes (CNTs) random network based vapor quantum resistive sensors (vQRSs) for volatile organic compounds (VOCs) detection. The localized transmission electron microscopy (TEM) image and energy dispersive X-ray spectroscopy (EDS) confirm migration of caffeine to CNT–CNT junction (CNTj). We have recorded more than one order of magnitude higher sensitivity and unique selectivity towards selective VOCs (e.g., acetone, toluene, ethanol, methanol, etc.) with short response time (few seconds) for caffeine modified CNT junction (Caf-CNTj) vQRSs. Molecular dynamics (MD) calculations suggest that the sensitivity of the sensor is diffusion limited, with an advective contribution for ethanol. The designed Caf-CNTj sensors can potentially be important candidate to be a part of electronic nose used for various application such as breath analysis and food quality monitoring. © 2020 Elsevier B.V.

关键词： Caffeine Carbon nanotubes Diffusion Functionalization Molecular dynamics Sensors Volatile organic compounds

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Feasibility study of a coherent feedback squeezer

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Physical Review A 2020年第3期101卷 033802-033802页

作者： Shota Yokoyama Daniel Peace Warit Asavanant Takeyoshi Tajiri Ben Haylock Moji Ghadimi Mirko Lobino Elanor H. Huntington Hidehiro Yonezawa Centre for Quantum Computation and Communication Technology and School of Engineering and Information Technology The University of New South Wales Canberra ACT 2600 Australia Centre for Quantum Computation and Communication Technology and Centre for Quantum Dynamics Griffith University Brisbane QLD 4111 Australia Department of Applied Physics School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan School of Engineering and Information Technology The University of New South Wales Canberra ACT 2600 Australia Institute of Industrial Science The University of Tokyo 4-6-1 Komaba Meguro-ku Tokyo 153-8505 Japan Centre for Quantum Dynamics Griffith University Brisbane QLD 4111 Australia Queensland Micro and Nanotechnology Centre Griffith University Brisbane QLD 4111 Australia Centre for Quantum Computation and Communication Technology and Research School of Electrical Energy and Materials Engineering College of Engineering and Computer Science Australian National University Canberra ACT 2600 Australia

We investigate a coherent feedback squeezer that uses quantum coherent feedback (measurement-free) control. Our squeezer is simple, easy to implement, robust to the gain fluctuation, and broadband compared to the existing squeezers because of the negative coherent feedback configuration. We conduct a feasibility study that looks at the stability conditions for a feedback system to optimize the designs of real optical devices. The feasibility study gives fabrication tolerance necessary for designing and realizing the actual device. Our formalism for the stability analysis is not limited to optical systems but can be applied to the other bosonic systems.

关键词： Quantum feedback Quantum information processing with continuous variables Quantum optics

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Refractory doped titanium nitride nanoscale field emitters

arXiv

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arXiv 2020年

作者： Nardi, Alberto Turchetti, Marco Britton, Wesley A. Chen, Yuyao Yang, Yujia Negro, Luca Dal Berggren, Karl K. Keathley, Phillip D. Research Laboratory of Electronics Massachusetts Institute of Technology 50 Vassar Street CambridgeMA02139 United States Department of Electronics and Telecommunications Politecnico di Torino Corso Duca degli Abruzzi 24 Torino10129 Italy Division of Materials Science & Engineering Boston University 15 Saint Mary’s Street BrooklineMA02446 United States Department of Electrical & Computer Engineering and Photonics Center Boston University 8 Saint Mary’s Street BostonMA02215 United States Department of Physics Boston University 590 Commonwealth Avenue BostonMA02215 United States

Refractory materials exhibit high damage tolerance, which is attractive for the creation of nanoscale field-emission electronics and optoelectronics applications that require operation at high peak current densities and optical intensities. Recent results have demonstrated that the optical properties of titanium nitride, a refractory and CMOS-compatible plasmonic material, can be tuned by adding silicon and oxygen dopants. However, to fully leverage the potential of titanium (silicon oxy)nitride, a reliable and scalable fabrication process with few-nm precision is needed. In this work, we developed a fabrication process for producing engineered nanostructures with gaps between 10 and 15 nm, aspect ratios larger than 5 with almost 90° steep sidewalls. Using this process, we fabricated large-scale arrays of electrically-connected bow-tie nanoantennas with few-nm free-space gaps. We measured a typical variation of 4 nm in the average gap size. Using applied DC voltages and optical illumination, we tested the electronic and optoelectronic response of the devices, demonstrating sub-10-V tunneling operation across the free-space gaps, and quantum efficiency of up to 1 × 10−3 at 1.2 µm, which is comparable to a bulk silicon photodiode at the same wavelength. Tests demonstrated that the titanium silicon oxynitride nanostructures did not significantly degrade, exhibiting less than 5 nm of shrinking of the average gap dimensions over few-µm2 areas after roughly 6 hours of operation. Our results will be useful for developing the next generation of robust and CMOS-compatible nanoscale devices for high-speed and low-power field-emission electronics and optoelectronics applications. Copyright © 2020, The Authors. All rights reserved.

关键词： Titanium nitride

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Generation and Hall effect of skyrmions enabled using nonmagnetic point contacts

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Physical Review B 2019年第18期100卷 184426-184426页

作者： Zidong Wang Xichao Zhang Jing Xia Le Zhao Keyu Wu Guoqiang Yu Kang L. Wang Xiaoxi Liu Suzanne G. E. te Velthuis Axel Hoffmann Yan Zhou Wanjun Jiang State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China Frontier Science Center for Quantum Information Tsinghua University Beijing 100084 China School of Science and Engineering The Chinese University of Hong Kong Shenzhen Guangdong 518172 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Department of Electrical Engineering University of California Los Angeles California 90095 USA Department of Electrical and Computer Engineering Shinshu University 4-17-1 Wakasato Nagano 380–8553 Japan Materials Science Division Argonne National Laboratory Lemont Illinois 60439 USA

The generation and manipulation of magnetic skyrmions are perquisites for any skyrmion-based information processing devices, where skyrmions are used as nonvolatile information carriers. In this work, we report experimentally the skyrmion generation through the usage of a nonmagnetic conducting Ti/Au point contact in a device made of a Ta/CoFeB/TaOx trilayer film. Moreover, the accompanied topological charge-dependent skyrmion dynamics, namely the skyrmion Hall effect, is also observed in the same device. The creation process of a skyrmion has been numerically reproduced through micromagnetic simulations, in which the important role of the skyrmion-antiskyrmion pair formation is identified. The motion and Hall effect of a skyrmion, immediately after its creation, is described using a modified Thiele equation after taking into account the contribution from spatially inhomogeneous spin-orbit torques and the Magnus force. Our results on the simultaneous generation and manipulation of skyrmions using a nonmagnetic point contact are useful for understanding the ultrafast dynamics of skyrmion creation, which could also provide an effective pathway for designing skyrmion-based devices.

关键词： Dzyaloshinskii-Moriya interaction Hall effect Micromagnetism Skyrmions Spin texture Spin torque Magnetic multilayers Point contacts Magneto-optical Kerr effect Micromagnetic modeling

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Binding a hopfion in a chiral magnet nanodisk

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Physical Review B 2018年第17期98卷 174437-174437页

作者： Yizhou Liu Roger K. Lake Jiadong Zang Department of Electrical and Computer Engineering University of California Riverside California 92521 USA Department of Physics and Materials Science Program University of New Hampshire Durham New Hampshire 03824 USA

Hopfions are three-dimensional (3D) topological textures characterized by the integer Hopf invariant QH. Here we present the realization of a zero-field, stable hopfion spin texture in a magnetic system consisting of a chiral magnet nanodisk sandwiched by two films with perpendicular magnetic anisotropy. The preimages of the spin texture and numerical calculations of QH show that the hopfion has QH=1. Furthermore, another nontrivial state that includes a monopole-antimonopole pair (MAP) is also stabilized in this system. By applying an external magnetic field, hopfion and MAP states with the same polarization can be switched between each other. The topological transition between the hopfion and the MAP state involves a creation (annihilation) of the MAP and twist of the preimages. Our work paves the way to study nontrivial 3D topological spin textures and stimulates more investigations in the field of 3D spintronics.

关键词： Magnetic texture Solitons

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Author Correction: Filling the gap between topological insulator nanomaterials and triboelectric nanogenerators

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Nature communications 2022年第1期13卷 1570页

作者： Mengjiao Li Hong-Wei Lu Shu-Wei Wang Rei-Ping Li Jiann-Yeu Chen Wen-Shuo Chuang Feng-Shou Yang Yen-Fu Lin Chih-Yen Chen Ying-Chih Lai Department of Materials Science and Engineering National Chung Hsing University Taichung 40227 Taiwan. Department of Physics National Chung Hsing University Taichung 40227 Taiwan. Ming Hsieh Department of Electrical and Computer Engineering University of Southern California Los Angeles CA 90089 USA. Francis Bitter Magnet Lab Massachusetts Institute of Technology Cambridge MA 02139 USA. Department of Materials and Optoelectronic Science National Sun Yat-Sen University Kaohsiung 80424 Taiwan. i-Center for Advanced Science and Technology National Chung Hsing University Taichung 40227 Taiwan. Innovation and Development Center of Sustainable Agriculture National Chung Hsing University Taichung 40227 Taiwan. Department of Physics National Chung Hsing University Taichung 40227 Taiwan. yenfulin@nchu.edu.tw. i-Center for Advanced Science and Technology National Chung Hsing University Taichung 40227 Taiwan. yenfulin@nchu.edu.tw. Department of Materials and Optoelectronic Science National Sun Yat-Sen University Kaohsiung 80424 Taiwan. cychen@mail.nsysu.edu.tw. Department of Materials Science and Engineering National Chung Hsing University Taichung 40227 Taiwan. yclai@nchu.edu.tw. i-Center for Advanced Science and Technology National Chung Hsing University Taichung 40227 Taiwan. yclai@nchu.edu.tw. Innovation and Development Center of Sustainable Agriculture National Chung Hsing University Taichung 40227 Taiwan. yclai@nchu.edu.tw.

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