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IEEE International Conference on micro Electro Mechanical systems

作者： Yangxi Zhang Yiming Gui Fanrui Meng Linyu Li Chencheng Gao Hongwei Zhu Yilong Hao Institute of Microelectronics Peking University Beijing China National Key Laboratory of Nano/Micro Fabrication Technology Beijing China School of Materials Science & Engineering Tsinghua University Beijing China Innovation Center for MicroNanoelectronics and Integrated System Beijing China

ISBN: (纸本)9781509006090

In this paper, we report a novel water transfer printing method, which can transfer chemical vapor deposition (CVD) graphene from copper foil to 3D surface. By the aid of surface tension and Van der Waals force, multilayer graphene film can be transferred to various substrates with smooth surface including glass sheet, colophony filament, silicon oxide micro structure, polyimide (PI) film, polymethyl methacrylate (PMMA) tube and optical fibers. As the graphene film can be selectively transferred to assigned position in 3D surface, this simple room temperature transfer method has promising application potential in flexible MEMS and device on curved surface.

关键词： Graphene Films Surface treatment Copper Printing Three-dimensional displays Substrates

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Doping induced multiferroicity and quantum anomalous Hall effect in α-In2Se3 thin films

arXiv

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arXiv 2024年

作者： Tian, Zhiqiang Li, Jin-Yang Ouyang, Tao Liu, Chao-Fei Liu, Ziran Li, Si Pan, Anlian Chen, Mingxing Key Laboratory for Matter Microstructure and Function of Hunan Province Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education School of Physics and Electronics Hunan Normal University Changsha410081 China School of Physics Northwest University Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi’an710127 China Hunan Key Laboratory for Micro-Nano Energy Materials and Device School of Physics and Optoelectronics Xiangtan University Hunan Xiangtan411105 China School of Science Jiangxi University of Science and Technology Ganzhou341000 China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and Engineering Hunan University Changsha410082 China State Key Laboratory of Powder Metallurgy Central South University Changsha410083 China

In flat-band materials, the strong Coulomb interaction between electrons can lead to exotic physical phenomena. Recently, α-In2Se3 thin films were found to possess ferroelectricity and flat bands. In this work, using first-principles calculations, we find that for the monolayer, there is a Weyl point at Γ in the flat band, where the inclusion of the spin-orbit coupling opens a gap. Shifting the Fermi level into the spin-orbit gap gives rise to nontrivial band topology, which is preserved for the bilayer regardless of the interlayer polarization couplings. We further calculate the Chern number and edge states for both the monolayer and bilayer, for which the results suggest that they become quantum anomalous Hall insulators under appropriate dopings. Moreover, we find that the doping-induced magnetism for In2Se3 bilayer is strongly dependent on the interlayer polarization coupling. Therefore, doping the flat bands in In2Se3 bilayer can also yield multiferroicity, where the magnetism is electrically tunable as the system transform between different polarization states. Our study thus reveals that multiferroicity and nontrivial band topology can be unified into one material for designing multifunctional electronic devices. © 2024, CC BY.

关键词： Topology

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Mass-manufactural Lanthanide-based Ultraviolet C microlasers

Mass-manufactural Lanthanide-based Ultraviolet C Microlasers

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第九届国际稀土开发与应用研讨会暨2019中国稀土学会学术年会

作者： Limin Jin Yunkai Wu Yujie Wang Yuqi Zhang Zhiying Li Xian Chen Wenfei Zhang Shumin Xiao Qinghai Song State Key Laboratory on Tunable Laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information SystemShenzhen Graduate SchoolHarbin Institute of Technology College of Materials Science of Engineering Shenzhen University Shenzhen Key Laboratory of Laser Engineering College of Optoelectronic EngineeringShenzhen University Collaborative Innovation Center of Extreme Optics Shanxi University

Lanthanide(Ln)-based ultraviolet C（UVC） microlasers are highly desirable for diagnostics and phototherapy. Despite of their progresses, the potential applications of UVC microlasers are strongly hindered by their low optical gain, weak light confinements, and poor device repeatability. Herein, we report a novel approach to all-in-one solve the above limitations and realize mass-manufactural UVC microlasers. The gain coefficient at 289 nm has been improved from two aspects, i.e. the enhanced absorption via LiYbF:Tm（lmoI%）@LiYbF@LiLuF core-shell-shell nanocrystals and the suppression of competitive ultraviolet ***, by spin-coating the solution onto patterned SiO substrate, high-quality Ln-based microdisks are self-assembly formed on each SiO pillar and UVC whispering-gallery-mode lasers have been realized. The resulted lasing threshold is an order of magnitude smaller than the shortest deep-ultraviolet emission at 310 nm. Importantly,the lasing wavelengths and mode numbers of UVC lasers are highly controllable and repeatable, making them suitable for mass-production for the first time.

关键词： lanthanide-doped upconversion nanocrystals on-chip microlaser array ultraviolet C lasing emission high controllability whispering gallery modes

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Study on the 3D non-contact measurement method of hyaloid and closed container

Study on the 3D non-contact measurement method of hyaloid an...

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International Conference on systems and Informatics (ICSAI)

作者： Wei Pei Zheng Xu Yong Ying Zhu Chen Xiang Wang Environmental Science and Engineering College Dalian Maritime University Dalian Liaoning China Ocean and Civil Engineering Department Dalian Ocean University Dalian Liaoning China Key Laboratory for Micro/Nano Technology and System of Liaoning Province Dalian University of Technology Dalian Liaoning China

The research of microfluidic chip is a vital domain and the forefront of micro total analysis systems (μTAS). Compared with the development of microfluidic chip, the research of detecting systems for microfluidic chip is backward. The micro stereo vision system is a good solution for non-contact measurement of microfluidic chip. However, it often meets refraction of light and occlusion. In this paper, based on optical theory and digital image processing, the micro stereo imaging principle of stereo light microscope (SLM) is studied and the refraction correction and micro stereo occlusion correction algorithms are proposed to achieve microfluidic chip detection. These algorithms quantize the influence of cover plate and occlusion on the measurement accuracy, and realize nondestructive, non-contact and precise 3D measurement of a hyaloid and closed container.

关键词： Stereo vision microfluidics Semiconductor device measurement Sea measurements Adaptive optics Optical imaging Optical refraction

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Phyllotaxis-inspired nanosieves with multiplexed orbital angular momentum

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eLight 2021年第1期1卷 46-56页

作者： Zhongwei Jin David Janoschka Junhong Deng Lin Ge Pascal Dreher Bettina Frank Guangwei Hu Jincheng Ni Yuanjie Yang Jing Li Changyuan Yu Dangyuan Lei Guixin Li Shumin Xiao Shengtao Mei Harald Giessen Frank Meyer zu Heringdorf Cheng-Wei Qiu Department of Electrical and Computer Engineering National University of Singapore4 Engineering Drive 3Singapore 117583Singapore College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China Faculty of Physics and Center for Nanointegration Duisburg-Essen(CENIDE) University of Duisburg-EssenLotharstrasse 1-2147057 DuisburgGermany Department of Materials Science and Engineering Shenzhen Institute for Quantum Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Beijing Qianjunyide Technology Co.Ltd Beijing 100031China. Physics Institute and Stuttgart Center of Photonics Engineering(SCoPE) University of Stuttgart70569 Stutt-gartGermany. School of Physics University of ElectronicScience and Technology of ChinaChengdu 611731China. Key Laboratory of Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China. Department of Electronic and Information Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARChina. Department of Materials Science and Engineering City University of Hong Kong83 Tat Chee AvenueKowloonHong Kong SARChina. State Key Laboratory On Tunable Laser Technology Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information SystemShenzhen Graduate SchoolHarbin Institute of TechnologyShenzhen 518055China.

nanophotonic platforms such as metasurfaces,achieving arbitrary phase profiles within ultrathin thickness,emerge as miniaturized,ultracompact and kaleidoscopic optical vortex ***,it is often required to segment or interleave independent sub-array metasurfaces to multiplex optical vortices in a single nano-device,which in turn affects the device’s compactness and channel ***,inspired by phyllotaxis patterns in pine cones and sunflowers,we theoretically prove and experimentally report that multiple optical vortices can be produced in a single compact phyllotaxis nanosieve,both in free space and on a chip,where one meta-atom may contribute to many vortices *** time-resolved dynamics of on-chip interference wavefronts between multiple plasmonic vortices was revealed by ultrafast time-resolved photoemission electron *** nature-inspired optical vortex generator would facilitate various vortex-related optical applications,including structured wavefront shaping,free-space and plasmonic vortices,and high-capacity information metaphotonics.

关键词： Phyllotaxis vortex nanosieve Free-space Plasmonic vortices Ultrafast time-resolved

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Preparation of graphene-MoS_2 hybrid aerogels as multifunctional sorbents for water remediation

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science China Materials 2017年第11期60卷 1102-1108页

作者：陈博毕恒昌马青朗谭超良程洪飞陈也贺馨雁孙立涛林德岱黄岭张华 Nanyang Environment and Water Research Institute(NEWRI) Nanyang Technological UniversitySingapore 637141Singapore Interdisciplinary Graduate School(IGS) Nanyang Technological UniversitySingapore 639798Singapore Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationCollaborative Innovation Center for Micro/Nano Fabrication Device and SystemSoutheast UniversityNanjing 210096China School of Civil and Environmental Engineering Nanyang Technological UniversitySingapore 639798Singapore Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nationa1 Iiangsu Synergistic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(NanjingTech)Nanjing 211816China

The increasing demand of clean water and ef- fective way to recycle industrial wastewater has offered a new application for carbon-based three-dimensional （3D） porous networks as sorbents due to their superior sorption abilities. Through the surface modification and hybridization with functional materials, the physical and chemical properties of the 3D carbon-based materials can be engineered. In this work, graphene-MoS2 aerogels （GMAs） with bulky shape are synthesized via a one-pot hydrothermal method. The obtained GMAs show quick sorption rate and high sorption capacity towards a wide variety of contaminants. The sorption covers not only organic solvents or organic dyes, but also toxic heavy metals ions such as Hg2＋ and Pb2＋. More importantly, the sorption capacity towards metal ions can be optimized by simply changing the loading amount of MoS2.

关键词： Graphene MoS2 aerogels multifunctional sorbents water remediation

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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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Two Dimensional Pts2/Bn Heterostructure as an S-Scheme Photocatalyst with Enhanced Activity for Overall Water Decomposition

SSRN

引用

SSRN 2022年

作者： Wang, Biao Yuan, Hongkuan Yang, Tie Wang, Peng Kuang, Anlong Xu, Xiaohui Jiang, Yuwen Chen, Hong Dong, Fan School of Physical Science and Technology Southwest University Chongqing 400715 China School of Resources and Environment Institute of Fundamental and Frontier Science University of Electronic Science and Technology of China Chengdu611731 China Chongqing key Laboratory of Micro Nano Structure Optoelectronics School of Physical Science and Technology Southwest University Chongqing 400715 China Key Laboratory of Luminescent and Real-Time Analytical Chemistry Ministry of Education School of Chemistry and Chemical Engineering Southwest University Chongqing 400715 China

Photocatalytic hydrogen production from water by utilizing the inexhaustible solar energy is a sustainable solution for the environmental pollution and energy crisis. Encouraged by the successful synthesis of PtS2and BN nanosheets and their suitable band edges, we have investigated the electronic and optical properties of two dimensional PtS2/BN heterojunction as the step-scheme (S-scheme) photocatalyst based on the hybrid DFT calculations in this work. In this system, the built-in electric field and band edge bending can retain useful electrons on the conduct band of BN and holes on the valence band of PtS2, which endows this system with stronger redox ability. Meanwhile, this electric field can efficiently separate photoinduced electron-hole pairs and improve photocatalytic efficiency. Compared with BN and PtS2single layers, the PtS2/BN heterojunction possesses smaller bandgap and can make better use of the visible and infrared light. Additionally, we have studied whether strains can tune its electronic and optical properties. This work aims to provide a method for constructing high-efficiency BN-based photocatalyst and illuminating the electron migration mechanism in S-scheme heterostructures. We have found thatPtS2/BN bilayer heterojunction is a promising S-scheme photocatalyst for overall water decomposition. © 2022, The Authors. All rights reserved.

关键词： Optical properties

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Applications of MXenes in human-like sensors and actuators

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nano Research 2023年第4期16卷 5767-5795页

作者： Jinbo Pang Songang Peng Chongyang Hou Xiao Wang Ting Wang Yu Cao Weijia Zhou Ding Sun Kai Wang Mark H.Rümmeli Gianaurelio Cuniberti Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongUniversity of JinanJinan 250022China Institute for Materials Science and Max Bergmann Center of Biomaterials Technische Universität DresdenDresden 01069Germany Center for Advancing Electronics Dresden Technische Universität DresdenDresden 01069Germany Dresden Center for Computational Materials Science Technische Universität DresdenDresden 01062Germany Dresden Center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresden 01062Germany High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Microelectronic Devices&Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China State Key Laboratory of Biobased Material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353China School of Bioengineering Qilu University of TechnologyShandong Academy of ScienceJinan 250353China Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology(Ministry of Education) Northeast Electric Power UniversityJilin 132012China School of Electrical Engineering Northeast Electric Power UniversityJilin 132012China School of Electrical Engineering Weihai Innovation Research InstituteQingdao UniversityQingdao 266000China School of Electrical and Computer Engineering Jilin Jianzhu UniversityChangchun 130118China Institute for Complex Materials Leibniz Institute for Solid State and Materials Research Dresden(IFW Dresden)20 Helmholtz StrasseDresden 01069Germany College of Energy Soochow Institute for Energy and Materials Innovations Soochow UniversitySuzhou 215006China Key L

Human beings perceive the world through the senses of sight,hearing,smell,taste,touch,space,and *** first five senses are prerequisites for people to *** sensing organs upload information to the nervous systems,including the brain,for interpreting the surrounding ***,the brain sends commands to muscles reflexively to react to stimuli,including light,gas,chemicals,sound,and ***,as an emerging two-dimensional material,has been intensively adopted in the applications of various sensors and *** this review,we update the sensors to mimic five primary senses and actuators for stimulating muscles,which employ MXene-based film,membrane,and composite with other functional ***,a brief introduction is delivered for the structure,properties,and synthesis methods of ***,we feed the readers the recent reports on the MXene-derived image sensors as artificial retinas,gas sensors,chemical biosensors,acoustic devices,and tactile sensors for electronic ***,the actuators of MXene-based composite are ***,future opportunities are given to MXene research based on the requirements of artificial intelligence and humanoid robot,which may induce prospects in accompanying healthcare and biomedical engineering applications.

关键词： MXenes sensors actuators gas sensors biosensors tactile sensors sound sensors artificial retina

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The consistent behavior of negative Poisson's ratio with interlayer interactions

arXiv

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arXiv 2022年

作者： Wang, Yancong Yu, Linfeng Zhang, Fa Chen, Qiang Zhan, Yuqi Zheng, Xiong Wang, Huimin Qin, Zhenzhen Qin, Guangzhao State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle Engineering Hunan University Changsha410082 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150001 China Hunan Key Laboratory for Micro-Nano Energy Materials & Device School of Physics and Optoelectronics Xiangtan University Hunan Xiangtan411105 China School of Physics and Microelectronics Zhengzhou University Zhengzhou450001 China

Negative Poisson's ratio (NPR) is of great interest due to the novel applications in lots of fields. Films are the most commonly used form in practical applications, which involves multiple layers. However, the effect of interlayer interactions on the NPR is still unclear. In this study, based on first principles calculations, we systematically investigate the effect of interlayer interactions on the NPR by comparably studying single-layer graphene, few-layer graphene, h-BN, and graphene-BN heterostructure. It is found that they almost have the same geometry-strain response. Consequently, the NPR in bilayer graphene, triple-layer graphene, and graphene-BN heterostructure are consistent with that in single-layer graphene and h-BN. The fundamental mechanism lies in that the response to strain of the orbital coupling are consistent under the effect of interlayer interactions. The deep understanding of the NPR with the effect of interlayer interactions as achieved in this study is beneficial for the future design and development of micro-/nanoscale electromechanical devices with novel functions based on nanostructures. © 2022, CC BY-NC-SA.

关键词： Graphene

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