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SSRN 2022年

作者： Kaner, Ngeywo Tolbert Wei, Yadong Raza, Ali Yang, Jianqun Li, Xingji Li, Weiqi Jiang, YongYuan Wei Quan, Tian School of Physics Harbin Institute of Technology Harbin150001 China School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China Technology Innovation Center of Materials and Devices at Extreme Environment Harbin Institute of Technology Harbin150001 China 1-Km Main Daska Road Punjab Sialkot51040 Pakistan State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Xi’an710024 China Key Lab of Micro-Optics and Photonic Technology of Heilongjiang Province Harbin150001 China Key Laboratory of Micro-Nano Optoelectronic Information System Ministry of Industry and Information Technology Harbin150001 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan030006 China Chongqing Key Laboratory of Theoretical and Computational Chemistry College of Chemistry and Chemical Engineering Chongqing University Chongqing401331 China

Shift photovoltaic current (SPC) in polar non-centrosymmetric materials has recently emerged as a promising candidate for the next generation photovoltaic devices in which Shockley-Queisser limits are fully overcome. Here, we apply first principles calculations to predict colossal SPC in the slide bilayers of 2D h -BN and β-GeS vdW homostructures. The large SPC in slide bilayers h -BN and β-GeS reaches 49.3 µAV-2 and 130µ µAV-2 , respectively, in the ultra-violet (UV) region. Increasing the number of layers is further implemented to tune the band structure of the two homostructures. Consequently, giant SPC peaks about 3 times larger than those of the 2-layers is predicted at photon energies 7.40 eV and 5.95 eV in the 5-layers of h -BN and β-GeS, respectively. The two homostructures may thus be promising building blocks for next-generation shift current devices. These findings also suggest layering as a possible convenient approach of enhancing and also tuning the SPC output in thin layered materials. © 2022, The Authors. All rights reserved.

关键词： Van der Waals forces

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A Superhydrophobic Chip Integrated with an Array of Medium Reservoirs for Long-Term Hanging Drop Spheroid Culture

SSRN

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SSRN 2021年

作者： Sun, Bangyong Zhao, Yi Wu, Weimin Zhao, Qiang Li, Gang Key Laboratory of Optoelectronic Technology and Systems Ministry of Education Defence Key Disciplines Lab of Novel Micro-Nano Devices and System Technology Chongqing University Chongqing400044 China Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment Chongqing University Cancer Hospital Chongqing400030 China School of Mechanical and Power Engineering Chongqing University of Science and Technology Chongqing401331 China

Hanging drop (HD) is one of the most popular methods used for forming three-dimensional (3D) cell spheroids. However, conventional hanging drop systems are only applicable for short-term spheroid culture due to their inconvenience in exchanging cell culture media. Here we present a medium-reservoir-integrated superhydrophobic (MRI-SH) chip for long-term HD spheroid cultures. The device consists of two main components: i) a patterned superhydrophobic (SH) surface containing an array of wettable spots which anchor arrays of droplets of cell suspension, and ii) an array of chambers that serve as medium reservoirs, both interconnected via an array of thru-holes. This configuration provides two distinct advantages over conventional HD configurations: i) the high wettability contrast of the SH pattern on the chip leads to the formation and adhesion of nearly spherical hanging droplets on its surface, which minimizes interactions between the liquid and the substrate;ii) the integrated chambers provide large volumes of medium to maintain longer culture durations. Using this device, spheroids of MHCC97H cells were successfully formed, and the cultured spheroids could maintain high viability for up to 30 days and exhibited enhanced spheroid morphology compared to those cultured in the conventional HD systems. © 2021, The Authors. All rights reserved.

关键词： Drops

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Midgap states induced by Zeeman field and p wave superconductor pairing

arXiv

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arXiv 2023年

作者： Jin, Yuanjun Yue, XingYu Xu, Yong Yu, Xiang-Long Chang, Guoqing Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics South China Normal University Guangzhou510006 China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore637371 Singapore Physics Department Guangdong-Hong Kong Joint Laboratory of Quantum Matter The University of Hong Kong Pokfulam Road Hong Kong Institute of Micro/Nano Materials and Devices Ningbo University of Technology Zhejiang Ningbo315016 China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China International Quantum Academy Shenzhen518048 China

The one-dimensional Su-Schrieffer-Heeger (SSH) model is central to band topology in condensed matter physics, which allows us to understand and design distinct topological states. In this work, we find another mechanism to analogize the SSH model in a spinful system, realizing an obstructed atomic insulator by introducing intrinsic spin-orbit coupling and in-plane Zeeman field. In our model, the midgap states originate from a quantized hidden polarization with invariant index Z2 (0;01) due to the local inversion symmetry breaking. When the global inversion symmetry is broken, a charge pumping is designed by tuning the polarization. Moreover, by introducing the p + ip superconductor pairing potential, a new topological phase dubbed obstructed superconductor (OSC) is identified. This new state is characterized by invariant index Z2 (0;01) and nonchiral midgap states. More interestingly, these nonchiral edge states result in a chiral-like nonlocal conductance, which is different from the traditional chiral topological superconductor. Our findings not only find another strategy to achieve a spinful SSH model but also predict the existence of OSC, providing a promising avenue for further exploration of its transport properties. Copyright © 2023, The Authors. All rights reserved.

关键词： Superconducting materials

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Thermal Strain-Induced Self-Rolling Mesh Cuff Electrodes for Non-Linear Peripheral Nerve

Thermal Strain-Induced Self-Rolling Mesh Cuff Electrodes for...

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IEEE International Conference on micro Electro Mechanical systems

作者： Bowen Ji Lin Chen Minghao Wang Zhejun Guo Yuhao Zhou Shuaiqi Huangfu Kai Zhang Huicheng Feng Honglong Chang Jingquan Liu Unmanned System Research Institute Northwestern Polytechnical University Xi’an China Ministry of Education Key Laboratory of Micro/Nano Systems for Aerospace School of Mechanical Engineering Northwestern Polytechnical University Xi’an China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi’an Jiaotong University Xi’an China College of Electronics and Information Hangzhou Dianzi University Hangzhou China National Key Laboratory of Science and Technology on Micro/Nano Fabrication Shanghai Jiao Tong University China

ISBN: (数字)9781665419123

ISBN: (纸本)9781665430241

Cuff electrodes have been widely utilized on peripheral nerve for neural stimulation and recording applications. In this paper, we have proposed a self-rolling meshed cuff electrode induced by the thermal strain. The final cuff diameter is about 1.4 mm, which can match well with the peripheral nerve of rat (diameter of 1.54 mm at ischial tuberosity of sciatic nerve). The mechanical simulation of the mesh cuff illustrates the oblivious change from the plane cuff when bending with the nerve model. The mesh cuff not only facilities the flow of interstitial fluid in and out, but also shows the potential to combine with microfluidics or optogenetics technology.

关键词： Electrodes micromechanical devices Electric potential Fluids Rats microfluidics Strain

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From chiral biomolecules to chiral nanocrystals: A review of the latest developments and emerging concepts

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Chem 2025年

作者： Yao, Yisen Ávalos-Ovando, Oscar Ding, Tao Alvarez-Puebla, Ramon A. Yu, Peng Ashalley, Eric Ma, Li Wang, Zhiming Markovich, Gil Govorov, Alexander O. Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 China Shimmer Center Tianfu Jiangxi Laboratory Chengdu 641419 China Department of Physics and Astronomy Ohio University Athens 45701 OH United States Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education School of Physics and Technology Wuhan University Wuhan 430072 China ICREA Passeig Lluís Companys 23 Barcelona 08010 Spain Department of Physical and Inorganic Chemistry Universitat Rovira i Virgili Carrer de Marcel⋅lí Domingo s/n Tarragona 43007 Spain Sichuan Province Key Laboratory of Intelligent Devices Yibin Institute of UESTC Sichuan Yibin 644000 China School of Chemistry Raymond and Beverly Sackler Faculty of Exact Sciences Tel Aviv University Tel Aviv 6997801 Israel

This article reviews the latest developments in the field of chiral nanocrystals (NCs), focusing primarily on plasmonic NCs. Such nanomaterials under illumination concentrate electromagnetic energy in their vicinity, enabling efficient biosensing, asymmetric photocatalysis, and light manipulation. Starting our discussion with Lord Kelvin's definition of chirality, we describe how enantiomer pairs appear when the molecule becomes progressively more complex. Making a comparison with Pasteur's chirality of molecules, we discuss nanoscale enantiomers lacking exact mirror symmetry, so-called nonexact enantiomers, and why they should appear fundamentally. Whereas chirality is an intrinsically three-dimensional (3D) concept describing perfect mirror-imaged pairs, a novel property of pseudo-chirality is handy for understanding two-dimensional (2D) systems, including the case of plasmonic growth with circularly polarized light. The topics considered in the review include bio-templated NCs, chiral bio-assemblies, transfer of chirality from biomolecules to NCs, chirality and pseudo-chirality in 3D and 2D systems, growth of NCs under circularly polarized excitation, and more. © 2025 Elsevier Inc.

关键词： bio-assembly chiral nanocrystals chiral plasmonics circular dichroism DNA assemblies photochemistry SDG3: Good health and well-being SDG9: Industry, innovation, and infrastructure

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Corrigendum to "A multifunctional electronic dressing with textile-like structure for wound pressure monitoring and treatment" [J. Colloid Interface Sci. 679 (2025) 737-747]

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Journal of colloid and interface science 2025年 682卷 864页

作者： Junju Wang Chaoshan Zhao Peng Yang Hong He Yuping Yang Zhaoqing Lan Wei Guo Yiming Qin Qing Zhang Shunbo Li Key Laboratory of Optoelectronic Technology and Systems Ministry of Education & Key Disciplines Laboratory of Novel Micro-Nano Devices and System Technology College of Optoelectronic Engineering Chongqing University Chongqing 400044 China. Institute of Burn Research State Key Laboratory of Trauma Burn and Combined Injury Southwest Hospital Third Military Medical University Chongqing 400038 China. Key Laboratory of Optoelectronic Technology and Systems Ministry of Education & Key Disciplines Laboratory of Novel Micro-Nano Devices and System Technology College of Optoelectronic Engineering Chongqing University Chongqing 400044 China Chongqing College of Electronic Engineering Chongqing 401331 China. Department of Dermatology and Laboratory of Dermatology Clinical Institute of Inflammation and Immunology Frontiers Science Center for Disease-Related Molecular Network West China Hospital Sichuan University Chengdu 610041 China. Institute of Burn Research State Key Laboratory of Trauma Burn and Combined Injury Southwest Hospital Third Military Medical University Chongqing 400038 China. Electronic address: zhangqing09@***. Key Laboratory of Optoelectronic Technology and Systems Ministry of Education & Key Disciplines Laboratory of Novel Micro-Nano Devices and System Technology College of Optoelectronic Engineering Chongqing University Chongqing 400044 China. Electronic address: shunbo.li@***.

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Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications

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Light(science & Applications) 2020年第1期9卷 922-929页

作者： Xinrong Zong Huamin Hu Gang Ouyang Jingwei Wang Run Shi Le Zhang Qingsheng Zeng Chao Zhu Shouheng Chen Chun Cheng Bing Wang Han Zhang Zheng Liu Wei Huang Taihong Wang Lin Wang Xiaolong Chen Department of Electrical and Electronic Engineering Southern University of Science and Technology518055 ShenzhenChina Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(Nanjing Tech)30 South Puzhu Road211816 NanjingChina Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education and Key Laboratory for Matter Microstructure and Function of Hunan ProvinceHunan Normal University410081 ChangshaChina Department of Materials Science and Engineering Southern University of Science and Technology518055 ShenzhenChina Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore 639798Singapore Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science&TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro-Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen University518060 ShenzhenChina Frontiers Science Center for Flexible Electronics(FSCFE) Shaanxi Institute of Flexible Electronics(SIFE)&Shaanxi Institute of Biomedical Materials and Engineering(SIBME)Northwestern Polytechnical University(NPU)127 West Youyi Road710072 Xi’anChina

Mid-infrared(MIR)light-emitting devices play a key role in optical communications,thermal imaging,and material analysis ***-dimensional(2D)materials offer a promising direction for next-generation MIR devices owing to their exotic optical properties,as well as the ultimate thickness *** importantly,van der Waals heterostructures-combining the best of various 2D materials at an artificial atomic level-provide many new possibilities for constructing MIR light-emitting devices of large tuneability and high ***,we introduce a simple but novel van der Waals heterostructure for MIR light-emission applications built from thin-film BP and transition metal dichalcogenides(TMDCs),in which BP acts as an MIR light-emission *** BP–WSe_(2) heterostructures,an enhancement of~200% in the photoluminescence intensities in the MIR region is observed,demonstrating highly efficient energy transfer in this heterostructure with type-Ⅰ band *** BP-MoS_(2) heterostructures,a room temperature MIR light-emitting diode(LED)is enabled through the formation of a vertical PN heterojunction at the *** work reveals that the BP-TMDC heterostructure with efficient light emission in the MIR range,either optically or electrically activated,provides a promising platform for infrared light property studies and applications.

关键词： light phosphorus constructing

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Localization of chiral edge states by the non-Hermitian skin effect

arXiv

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arXiv 2023年

作者： Liu, Gui-Geng Mandal, Subhaskar Zhou, Peiheng Xi, Xiang Banerjee, Rimi Hu, Yuan-Hang Wei, Minggui Wang, Maoren Wang, Qiang Gao, Zhen Chen, Hongsheng Yang, Yihao Chong, Yidong Zhang, Baile Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore637371 Singapore National Engineering Research Center of Electromagnetic Radiation Control Materials State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen518055 China School of Physics Collaborative Innovation Center of Advanced Microstructures Nanjing University Jiangsu Nanjing210093 China Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation ZJU-Hangzhou Global Science and Technology Innovation Center College of Information Science and Electronic Engineering Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang ZJU-UIUC Institute Zhejiang University Hangzhou310027 China Centre for Disruptive Photonic Technologies The Photonics Institute Nanyang Technological University 50 Nanyang Avenue Singapore639798 Singapore

Quantum Hall systems host chiral edge states extending along the one-dimensional boundary of any two-dimensional sample. In solid state materials, the edge states serve as perfectly robust transport channels that produce a quantised Hall conductance;due to their chirality, and the topological protection by the Chern number of the bulk bandstructure, they cannot be spatially localized by defects or disorder. Here, we show experimentally that the chiral edge states of a lossy quantum Hall system can be localized. In a gyromagnetic photonic crystal exhibiting the quantum Hall topological phase, an appropriately structured loss configuration imparts the edge states’ complex energy spectrum with a feature known as point-gap winding. This intrinsically non-Hermitian topological invariant is distinct from the Chern number invariant of the bulk (which remains intact) and induces mode localization via the "non-Hermitian skin effect". The interplay of the two topological phenomena – the Chern number and point-gap winding – gives rise to a non-Hermitian generalisation of the paradigmatic Chern-type bulk-boundary correspondence principle. Compared to previous realisations of the non-Hermitian skin effect, the skin modes in this system have superior robustness against local defects and disorders. Copyright © 2023, The Authors. All rights reserved.

关键词： Topology

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Negative differential resistance and quantum oscillations in FeSb_2 with embedded antimony

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Chinese Physics B 2019年第3期28卷 321-327页

作者： Fangdong Tang Qianheng Du Cedomir Petrovic Wei Zhang Mingquan He Liyuan Zhang Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices Renmin University of China Department of Physics Southern University of Science and Technologyand Shenzhen Institute for Quantum Science and Engineering Condensed Matter Physics and Materials Science Department Brookhaven National Laboratory Department of Materials Science and Chemical Engineering Stony Brook University Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials College of PhysicsChongqing University

We present a systematical study on single crystalline FeSb2 using electrical transport and magnetic torque measurements at low temperatures. Nonlinear magnetic field dependence of Hall resistivity demonstrates a multi-carrier transport instinct of the electronic transport. Current-controlled negative differential resistance(CC-NDR) observed in currentvoltage characteristics below ～ 7 K is closely associated with the intrinsic transition ～ 5 K of FeSb2, which is, however,mediated by extrinsic current-induced Joule heating effect. The antimony crystallized in a preferred orientation within the FeSb2 lattice in the high-temperature synthesis process leaves its fingerprint in the de Haas-Van Alphen(dHvA) oscillations, and results in the regular angular dependence of the oscillating frequencies. Nevertheless, possible existence of intrinsic non-trivial states cannot be completely ruled out. Our findings call for further theoretical and experimental studies to explore novel physics on flux-free grown FeSb_2 crystals.

关键词： two-carrier transport negative differential resistance quantum oscillations FeSb2 with embedded antimony

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Switchable magnetic and electronic properties in CrSX (X=Cl,Br,I) monolayers

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Physical Review Materials 2025年第5期9卷 054004-054004页

作者： Deju Zhang Zhangzhang Yang Tongwei Wu Wei Ji Yanning Zhang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 611731 People's Republic of China Key Laboratory for Quantum Physics and Photonic Quantum Information Ministry of Education University of Electronic Science and Technology of China Chengdu 611731 People's Republic of China Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices Department of Physics Renmin University of China Beijing 100872 People's Republic of China

Elemental substitution plays a crucial role in atomic-scale design of two-dimensional (2D) magnetic materials, such as Janus monolayers. In this work, we report that 1T'α-CrSX (X=Cl,Br,I) monolayers, where halogen atoms intermittently substitute double sulfur lines within the layer, are the most energetically favorable structures of the half-halogen-substituted trigonal CrS2 monolayers. Our findings indicate the CrSCl monolayer is doubly striped antiferromagnetic, and the CrSBr and CrSI monolayers are ferromagnetic. Their transition temperatures are estimated to reach up to 166 K via Monte Carlo simulations. Furthermore, it is found that the magnetic ground states of all these three monolayers can be easily tuned by applying uniaxial strains in the range of –3% to 2% along the x direction. Our study offers new insights into the discovery and synthesis of switchable 2D chromium-based magnetic materials.

关键词： Antiferromagnetic materials

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