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Real-time pressure mapping smart insole system based on a controllable vertical pore dielectric layer

Microsystems & Nanoengineering 2020年第1期6卷 644-653页

作者： Juan Tao Ming Dong Li Li Chunfeng Wang Jing Li Yue Liu Rongrong Bao Caofeng Pan CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of Sciences100083 BeijingPeople’s Republic of China College of Optoelectronic Engineering Shenzhen University518060 ShenzhenPeople’s Republic of China Beijing Institute of Tracking and Telecommunications Technology 100094 BeijingPeople’s Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanningGuangxi 530004People’s Republic of China School of Nanoscience and Technology University of Chinese Academy of Sciences100049 BeijingPeople’s Republic of China

Real-time monitoring of plantar pressure has significant applications in wearable biosensors,sports injury detection,and early ***,an all-in-one insole composed of 24 capacitive pressure sensors(CPSs)with vertical pores in an elastic dielectric layer is fabricated by laser *** CPSs with a hexagonal configuration and a pore size of 600μm possess good linearity over a wide detection range of 0–200 kPa with a sensitivity of 12×10^(–3) kPa−***,a smart system including the all-in-one insole with the 24 CPS array,a data acquisition system with a wireless transmitter and a PC terminal with a wireless receiver is established for real-time monitoring to realize static and dynamic plantar pressure *** on this smart insole system,various standing and yoga postures can be distinguished,and variations in the center of gravity during walking can be *** intelligent insole system provides great feasible supervision for health surveillance,injury prevention,and athlete training.

关键词： smart dielectric system

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Numerical Analyses of Liquid-Core Fiber Optic SPR sensor with Nano-Porous Sio2 as Inner Coating

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Journal of Physics: Conference Series 2022年第1期2185卷

作者： Jinwei Meng Wei Luo Duo Yi Xuejin Li Xueming Hong College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen China Shenzhen Key Laboratory of Sensor Technology Shenzhen China Shenzhen Engineering Laboratory for Optical Fiber Sensors and Networks Shenzhen China Chinese University of Hong Kong Shenzhen China

In this paper, a novel type of liquid-core fiber optic SPR sensor with a nano-porous SiO2 inner coating is proposed. The nano-porous SiO2 is deposited on the inner wall of the quartz tube. Due to the flexible and adjustable refractive index of the deposited material, the RI detection range of the sensor is expanded. The simulation results show that the proposed sensor owns good responses in both low and high refractive index regions, with the corresponding RI sensitivities of 1043.71 nm/RIU and 1234.86 nm/RIU respectively, while the FWHM is only about 20 nm. There are some potential applications for the proposed sensor in environmental monitoring, biochemical detection, food safety etc.

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Investigating the interlayer electron transport and its in?uence on the whole electric properties of black phosphorus

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Science Bulletin 2019年第4期64卷 254-260页

作者： Bensong Wan Shaoqiang Guo Jiacheng Sun Yufei Zhang Yuyan Wang Caofeng Pan Junying Zhang Key Laboratory of Micro-nano Measurement Manipulation and Physics (Ministry of Education) School of Physics Beihang University CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences School of Nanoscience and Technology University of Chinese Academy of Sciences Center on Nanoenergy Research School of Physical Science and Technology Guangxi University College of Optoelectronic Engineering Shenzhen University

Two-dimensional(2D) nanomaterials have attracted great attention in next generation electronic and optoelectronic technologies due to the unique layered structure and excellent physical and chemical properties. However, the mechanism of transmission along the vertical direction of 2D semiconductor materials has not been investigated. Here, we use first-principles calculations to explore the bandgap energies along different directions, and fabricate a vertical, a lateral and a mixture-structured black phosphorus field effect transistor(BPFET) to study the electrical characteristics along different directions under variable temperatures. The variable temperature test indicates that the mixture-structured device performs more like a lateral device, while the conductance along the vertical direction is hard to be tuned by temperature and electrical field. The unchanged conductance under electric field and variable temperatures allows the vertical device to act as a fixed resistor, promising possible application for the prospective electronic and optoelectronic devices.

关键词： Black phosphorus Transistor Transmission Vertical Variable temperature

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A spectrum-based shortcut method for topological systems

arXiv

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arXiv 2023年

作者： Xu, Jian Mei, Feng Zhu, Yan-Qing College of Electronics and Information Engineering Guangdong Ocean University Guangdong Engineering Technology Research Center of Intelligent Ocean Sensor Network and Equipment guangdong Zhanjiang524088 China Guangdong Provincial Smart Ocean Sensing Networks and Equipment Engineering Technology Research Center Zhanjiang524088 China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser Spectroscopy Shanxi University Shanxi Taiyuan030006 China Quantum Science Center of Guangdong-Hong Kong-Macau Great Bay Area 3 Binlang Road Shenzhen China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Department of Physics HK Institute of Quantum Science & Technology The University of Hong Kong Pokfulam Road Hong Kong

The need for fast and robust quantum state transfer is an essential element in scalable quantum information processing, leading to widespread interest in shortcuts to adiabaticity for speeding up adiabatic quantum protocols. However, shortcuts to adiabaticity for systems with more than a few levels is occasionally challenging to compute in theory and frequently difficult to implement in experiments. In this work, we develop a protocol for constructing shortcuts to adiabaticity through the multi-state Landau-Zener approach and a stricter adiabatic condition. Importantly, our protocol only requires a few pieces of information about the energy spectrum and just adjusts the evolutionary rate of the system. It means that our protocol has broad applicability to theoretical models and does not require increasing the difficulty of the experiment. As examples, we apply our protocol to state transfer in the two-level Landau-Zener model, the non-Hermitian Su-Schrieffer-Heeger (SSH) model and the topological Thouless pump model and find that it can speed up the manipulation speed while remaining robust to Hamiltonian errors. Furthermore, based on the experimental friendliness of our findings, it can potentially be extended to many-body systems, dissipation cases, or Floquet processes. Overall, the proposed shortcut protocol offers a promising avenue for enhancing the efficiency and reliability of quantum state transfer protocols. © 2023, CC0.

关键词： Topology

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A Waterproof, Breathable Nitrocellulose-Based Triboelectric Nanogenerator for Human-Machine Interaction

SSRN

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SSRN 2023年

作者： Zheng, Tong Li, Guizhong Zhang, Linnan Sun, Weifang Pan, Xiaoming Chen, Taihong Wang, Yuanhao Zhou, Yuqing Tian, Jili Yang, Ya College of Mechanical and Electrical Engineering Wenzhou University Wenzhou325035 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing101400 China Hoffmann Institute of Advanced Materials Shenzhen Polytechnic 7098 Liuxian Boulevard Nanshan District Shenzhen518055 China Wenzhou University Pingyang Institute of Intelligent Manufacturing Wenzhou325400 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing100049 China College of Mechanical and Electrical Engineering Jiaxing Nanhu Unversity Jiaxing314001 China School of Energy and Mechanical Engineering Dezhou University Dezhou253023 China

Triboelectric nanogenerators (TENGs) have gained significant attention as a promising method for energy harvesting and self-powered sensing. In this study, we developed a waterproof, breathable, and biocompatible TENG based on nitrocellulose (NC) for human-machine interaction. To enhance the output performance, silver nanowires (Ag NWs) were doped into the tribo-positive layer (NC) in a facile method. Additionally, the modified nitrocellulose membrane exhibited outstanding properties such as waterproofness, breathability, flexibility, and transparency. The NC-based TENG doped with Ag NWs (NC-Ag NWs) demonstrated a 360% improvement in triboelectric performance compared to the unoptimized version. To comprehend the mechanism underlying this enhancement, we developed an internal capacitance model of the NC-Ag NWs. Leveraging the triboelectric performance and physical characteristics of NC-Ag NWs, we designed a self-powered single-electrode TENG (SNC-TENG) and a double-electrode TENG based matrix keyboard to facilitate real-time communication with electronic devices. The NC-based TENG can directly harvest mechanical energy associated with human motion and activities, thereby showing its potential application in human-machine interaction in various fields such as wearable devices, self-powered systems, and electronic skins (e-skins). © 2023, The Authors. All rights reserved.

关键词： Nanogenerators

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Quantifying electron-transfer in liquid-solid contact electri?cation

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Science Bulletin 2020年第11期65卷 868-869,M0003页

作者： Zuqing Yuan Caofeng Pan CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China

Since the triboelectric nanogenerator(TENG)was invented by *** Lin Wang’s group in 2012,triboelectric power has gradually attracted the attention of researchers as a new energy harvesting *** far,TENGs have entered many fields,and have made breakthrough progress in the *** present,*** Lin Wang has pointed out that the working nature of TENG is based on the combined effect of contact electrification and displacement current[1].When related to contact electrification,although several experimental results have provided clear evidence that electrons are dominant carriers in contact electrification between solids,there is still difficulty in illustrating the contact electrification between solid and liquid purely counting on electrons.

关键词：电子转移 technology. breakthrough

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Human spinal reflex like strain-controlled power devices based on piezotronic effect

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Science Bulletin 2020年第15期65卷 1228-1230页

作者： Rongrong Bao Caofeng Pan CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China

With the development of information technology,AI system and Internet of Things(IOT)technology,it is a long-term challenge to realize the automate actions of power devices in unexpected environmental *** recent years,many efforts had been reported to develop new intelligent power *** them,III-V material alloys with semiconductor and piezotronic effect had been proved to be a very effective solution for power electronics application problems.

关键词：功率调节器 power IOT

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Mechanoluminescence materials for advanced artificial skin

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Science Bulletin 2020年第14期65卷 1147-1149,M0003页

作者： Chunfeng Wang Dengfeng Peng Caofeng Pan College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Mechanoluminescence(ML)materials that convert the external mechanical energy into light emission without the assistance of electron or photon excitation have been emerging because of their promising application in infrastructure health monitoring,information safety,novel light sources and displays,energy harvesting,aerospace engineering,soft electronics,smart robotics,the Internet of Things,and biomedicine[1].The documented record of ML can be retrospect to 1605,Francis Bacon described mechanically-induced light emission during the scraping of the hard sugar with a knife“sugar shineth only while in scraping”in his celebrated work on“Of the proficience and advancement of learning,divine and human”[2],while the ML observed from the striking stone or quartz by the primitive man may have been a million *** date,a myriad of MLmaterials covering conductor,semiconductor and insulator have been discovered or synthesized,especially after the development of photomultiplier tube in the mid-20th century,with a conservative estimation of half of inorganic crystals and third of organic compounds harboring ML[3].ML can be categorized into deformation luminescence and triboluminescence according to the physical process involved in inducing luminescence.

关键词： sugar striking harbor

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Controlled fabrication, lasing behavior and excitonic recombination dynamics in single crystal CH3NH3PbBr3 perovskite cuboids

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Science Bulletin 2019年第10期64卷 698-704页

作者： Fangtao Li Junfeng Lu Qinglin Zhang Dengfeng Peng Zheng Yang Qian Xu Caofeng Pan Anlian Pan Tianfeng Li Rongming Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and Physics University of Science and Technology Beijing Beijing 100083 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education College of Materials and Engineering Hunan University Changsha 410082 China College of Optoelectronic Engineering Shenzhen University Shenzhen 518060 China School of Physics and Electronics Henan University Kaifeng 475004 China

As a direct bandgap semiconductor, organic-inorganic lead halide perovskite (MAPbX3, MA = CH3NH3, X =Cl, Br, I) have been considered as promising materials for laser due to their excellent optoelectronic properties. The perovskite materials with ID and 2D shapes were widely prepared and studied for Fabry-Perot mode and whispering-gallery-mode (WGM) microcavities, but cuboid-shape is rarely reported. In this work, we successfully fabricated single crystal cuboid-shaped MAPbBr3 perovskite w让h different morphologies, named microcuboid-MAPbBr3 (M-MAPbBr3) and multi-step-MAPbBr3 (MSMAPbBr3), via solvothermal method. Furthermore, the as-prepared *crystals excitonic recombination lifetime under different pumping energy density was studied by time-resolved photoiuminescence (TRPL). Based on controllable morphology and remarkable lasing properties, these cuboid shaped single crystal perovskite could be a promising candidate for small laser, and other optoelectronic devices.

关键词： Lead halide perovskite Solvothermal method Single crystal cuboid Lasing TRPL

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Corrections to “Deep Learning-Assisted Enhanced Fano Resonances in Symmetry-Breaking SOI Metasurface”

IEEE Photonics Journal

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IEEE Photonics Journal 2022年第1期14卷

作者： Zan Hui Chen Weicheng Chen Zhenzhou Cheng Guo-Wei Lu Jiaqi Wang College of Physics and Optoelectronic Engineering Shenzhen Key Laboratory of Sensor Technology Shenzhen University Shenzhen China School of Precision Instruments and Optoelectronics Engineering Tianjin University Tianjin China Key Laboratory of Optoelectronics Information Technology Ministry of Education Tianjin China Department of Chemistry The University of Tokyo Tokyo Japan Division of Computer Engineering The University of Aizu Aizuwakamatsu Fukushima Japan

In the above paper [1] there are errors which we correct here.

关键词： Metasurfaces

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