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Science China(Information Sciences) 2017年第4期60卷 180-190页

作者： Chunhua HE Jimeng ZHANG Qiancheng ZHAO Qinwen HUANG Zhenchuan YANG Dacheng ZHANG Guizhen YAN National Key Laboratory of Science and technology on micro/nano Fabrication Institute of Microelectronics Science and technology on Reliability physics and Application of Electronic Component Laboratory No.5 Electronics Research Institute of the Ministry of Industry and Information Technology

This paper proposes a novel electrical coupling suppressing and drive closed loop control method for a MEMS gyroscope with feed-forward coupling compensation(FCC) and scalable fuzzy control. Theoretical analysis of the novel method is described in detail, and it is very simple to realize. Experimental results demonstrate that the electrical anti-resonant peaks located at the amplitude-frequency and phase-frequency responses are both eliminated by FCC control, and the height of the amplitude resonant peak increases more than 24 d B over 1800 Hz span. In addition, the overshoot of the transient response with scalable fuzzy control is smaller than 5%, and the settling time is less than 15 ms. The stabilities of the resonant amplitude and phase of the drive-mode velocity with scalable fuzzy control are about 15 ppm and 11 ppm, respectively. The scale factor of the gyroscope is measured to be 33.98 m V/deg/s with nonlinearity about 0.08%. Furthermore, the bias instability of the gyroscope with wavelet analysis is improved to be about 6.3 deg/h from 25.2 deg/h of the gyroscope without wavelet analysis.

关键词： MEMS gyroscope electrical coupling suppressing anti-resonance feed-forward coupling compen sation scalable fuzzy control

Design and fabrication of metal spherical conformal thin film multisensor for high-temperature environment

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Chinese Journal of Aeronautics 2024年第11期37卷 535-547页

作者： Lida XU Xiong ZHOU Yong HUANG Yusen WANG Chenhe SHAO Yuelong LI Lingyun WANG Qingtao YANG Daoheng SUN Qinnan CHEN Discipline of Intelligent Instrument and Equipment Pen-Tung Sah Institute of Micro-Nano Science and TechnologyXiamen UniversityXiamen 361102China Fujian micro/nano Manufacturing Engineering technology Research center Xiamen UniversityXiamen 361102China China Aerodynamics Research and Development center Mianyang 621000China

Conformal thin-film sensors enable precise monitoring of the operating conditions of components in extreme ***,the development of these sensors encounters major challenges,especially in uniformly applying multiple film layers on complex metallic surfaces and accurately capturing diverse operational *** work reports a multi-sensor design and multi-layer additive manufacturing process targeting spherical metallic *** proposed high-temperature dip-coating and self-leveling fabrication process achieves high-temperature thin-film coatings with excellent uniformity,high-temperature electrical insulation,and adhesion *** fabricated Ag/Pt thin film thermocouple arrays and a heat flux sensor exhibit a maximum temperature resistance of up to 960℃,with thermoelectric potential outputs and hightemperature resistance closely mirroring those of wire-based Ag/Pt *** environmental testing was conducted using high-power lasers and a flame *** results show that the array of thin-film conformal thermocouples more accurately reflected temperature changes at different points on a spherical *** heat flux sensors achieve responses within 95 ms and with-stand environments with heat fluxes over 1.2 MW/m^(2).The proposed multi-sensor design and fabrication method offers promising monitoring applications in harsh environments,including aerospace and nuclear power.

关键词： Conformal thin-film sensor Metallic spherical surfaces Multi-sensor perception Harsh environments Additive manufacturing

Anelasticity of twinned CuO nanowires

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nano Research 2015年第11期8卷 3687-3693页

作者： Huaping Sheng He Zheng Fan Cao Shujing Wu Lei Li Chun Liu Dongshan Zhao Jianbo Wang School of physics and technology Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures Wuhan University Wuhan 430072 China

The mechanical behavior of CuO nanowires （NWs） was investigated by in situ transmission electron microscopy. During compression, the NWs exhibited high bending capabilities associated with high mechanical stress. Interestingly, anelasticity was consistently observed after stress release. Further investigations indicate that the anelasticity is intrinsic to the CuO NWs, although electron- beam irradiation was proved capable of accelerating the shape recovery. A mechanism based on the cooperative motion of twin-associated atoms is proposed to account for this phenomenon. The results provide insight into the mechanical properties of CuO NWs, which are promising materials for nanoscale damping systems.

关键词： CuO anelasticity nanowire shape recovery twin

Passive activity enhances residual control ability in patients with complete spinal cord injury

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Neural Regeneration Research 2025年第8期20卷 2337-2347页

作者： Yanqing Xiao Mingming Gao Zejia He Jia Zheng Hongming Bai Jia-Sheng Rao Guiyun Song Wei Song Xiaoguang Li Beijing Key Laboratory for Biomaterials and Neural Regeneration Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Rehabilitation Evaluation China Rehabilitation Research CenterBeijingChina Cardiac center Beijing Children’s HospitalCapital Medical UniversityBeijingChina The State Key Laboratory of Virtual Reality technology and Systems Beihang UniversityBeijingChina Department of Rehabilitation Engineering China Rehabilitation Science InstituteBeijingChina

Patients with complete spinal cord injury retain the potential for volitional muscle activity in muscles located below the spinal injury ***,because of prolonged inactivity,initial attempts to activate these muscles may not effectively engage any of the remaining neurons in the descending pathway.A previous study unexpectedly found that a brief clinical round of passive activity significantly increased volitional muscle activation,as measured by surface *** this study,we further explored the effect of passive activity on surface electromyographic signals during volitional control tasks among individuals with complete spinal cord *** patients with chronic complete thoracic spinal cord injury were *** electromyography data from eight major leg muscles were acquired and compared before and after the passive activity *** results indicated that the passive activity led to an increased number of activated volitional muscles and an increased frequency of *** the cumulative root mean square of surface electromyography amplitude for volitional control of movement showed a slight increase after passive activity,the difference was not statistically *** findings suggest that brief passive activity may enhance the ability to initiate volitional muscle activity during surface electromyography tasks and underscore the potential of passive activity for improving residual motor control among patients with motor complete spinal cord injury.

关键词： complete spinal cord injury cycle training epidural electrical stimulation motor training passive activity physiological state spinal cord circuit surface electromyography volitional control task

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

Influence of barrier thickness on the structural and optical properties of InGaN/GaN multiple quantum wells

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Chinese physics B 2014年第5期23卷 328-332页

作者：梁明明翁国恩张江勇蔡晓梅吕雪芹应磊莹张保平 Department of physics Xiamen University Pen-Tung Sah institute of micro-nano Science and technology Xiamen University Department of Electronic Engineering Xiamen University

The structural and optical properties of InGaN/GaN multiple quantum wells （MQWs） with different barrier thick-nesses are studied by means of high resolution X-ray diffraction （HRXRD）, a cross-sectional transmission electron mi-croscope （TEM）, and temperature-dependent photoluminescence （PL） measurements. HRXRD and cross-sectional TEM measurements show that the interfaces between wells and barriers are abrupt and the entire MQW region has good periodic- ity for all three samples. As the barrier thickness is increased, the temperature of the turning point from blueshift to redshift of the S-shaped temperature-dependent PL peak energy increases monotonously, which indicates that the localization po- tentials due to In-rich clusters is deeper. From the Arrhenius plot of the normalized integrated PL intensity, it is found that there are two kinds of nonradiative recombination processes accounting for the thermal quenching of photoluminescence, and the corresponding activation energy （or the localization potential） increases with the increase of the barrier thickness. The dependence on barrier thickness is attributed to the redistribution of In-rich clusters during the growth of barrier layers, i.e., clusters with lower In contents aggregate into clusters with higher In contents.

关键词： InGaN/GaN multiple quantum wells barrier thickness thermal quenching localization potential

Position-resolved Surface Characterization and nanofabrication Using an Optical microscope Combined with a nanopipette/Quartz Tuning Fork Atomic Force microscope

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nano-micro Letters 2014年第1期6卷 70-79页

作者： Sangmin An Baekman Sung Haneol Noh Corey Stambaugh Soyoung Kwon Kunyoung Lee Bongsu Kim Qhwan Kim Wonho Jhe center for nano-Liquid Department of Physics and AstronomySeoul National University National institute of Standards and technology

In this work, we introduce position-resolved surface characterization and nanofabrication using an optical microscope(OM) combined with a nanopipette-based quartz tuning fork atomic force microscope(nanopipette/QTF-AFM) system. This system is used to accurately determine substrate position and nanoscale phenomena under ambient conditions. Solutions consisting of 5 nm Au nanoparticles, nanowires, and polydimethylsiloxane(PDMS) are deposited onto the substrate through the nano/microaperture of a pulled pipette. nano/microscale patterning is performed using a nanopipette/QTF-AFM, while position is resolved by monitoring the substrate with a custom OM. With this tool, one can perform surface characterization(force spectroscopy/microscopy) using the quartz tuning fork(QTF) sensor. nanofabrication is achieved by accurately positioning target materials on the surface, and on-demand delivery and patterning of various solutions for molecular architecture.

关键词： Surface characterization nanopipette QTF-AFM Optical microscope

Preparation of three-dimensional graphene foam for high performance supercapacitors

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Progress in Natural Science:Materials International 2017年第2期27卷 177-181页

作者： Yunjie Ping Youning Gong Qiang Fu Chunxu Pan School of physics and technology and MOE Key Laboratory of Artificial Micro-and Nano-structuresWuhan University center for Electron microscopy Wuhan University

Supercapacitor is a new type of energy-storage device, and has been attracted widely attentions. As a two dimensional（2D） nanomaterials, graphene is considered to be a promising material of supercapacitor because of its excellent properties involving high electrical conductivity and large surface area. In this paper, the largescale graphene is successfully fabricated via environmental-friendly electrochemical exfoliation of graphite, and then, the three dimensional（3D） graphene foam is prepared by using nickel foam as template and FeCl;/HCl solution as etchant. Compared with the regular 2D graphene paper, the 3D graphene foam electrode shows better electrochemical performance, and exhibits the largest specific capacitance of approximately 128 F/g at the current density of 1 A/g in 6 M KOH electrolyte. It is expected that the 3D graphene foam will have a potential application in the supercapacitors.

关键词： Supercapacitor 3D graphene foam 2D graphene paper Electrochemical performance

二维纳米材料的相变:设计策略和催化应用的最新进展（英文）

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Science China Materials 2025年第1期 65-85页

作者：吴泽棋钮峰陈达黄岳祥刘贵高周勇涂文广朱熹邹志刚 College of Materials and Chemistry China Jiliang University National Special Superfine Powder Engineering Research center School of Chemistry and Chemical Engineering Nanjing University of Science and Technology School of Science and Engineering The Chinese University of Hong Kong (Shenzhen) Jiangsu Key Laboratory for nano technology National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures School of Physics Nanjing University

二维(2D)纳米材料的相变会导致其电子和光学特性发生重大变化,为其开辟新的应用领域提供可能.最近, 2D纳米材料相工程的有效策略引起了广泛关注.本文综述了2D纳米材料相变的最新进展及其在催化领域的应用.首先,简要介绍了相变的基本概念...

二维(2D)纳米材料的相变会导致其电子和光学特性发生重大变化,为其开辟新的应用领域提供可能.最近, 2D纳米材料相工程的有效策略引起了广泛关注.本文综述了2D纳米材料相变的最新进展及其在催化领域的应用.首先,简要介绍了相变的基本概念,以及相变引起的显著电子和光学特性.以诱导相变的因素不同,将相变材料分为以下几种关键类型:(i)掺杂,(ii)外场,(iii)光照射,(iv)应变效应,(v)高能粒子激发,以及(vi)热处理.此外,还讨论了基于相变的二维纳米材料的催化领域的应用.最后,总结了控制2D纳米材料相变所涉及的技术挑战,并探讨了在该领域开发新应用的潜在机会.

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Feasibility analysis of angles-only navigation algorithm with multisensor data fusion for spacecraft noncooperative rendezvous

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Astrodynamics 2023年第2期7卷 179-196页

作者： Ronghua Du Wenhe Liao Xiang Zhang micro/nano Satellite Research center Nanjing University of Science and TechnologyNanjing 210094China

Relative navigation is crucial for spacecraft noncooperative rendezvous,and angles-only navigation using visible and infrared cameras provides a feasible ***,an angles-only navigation algorithm with multisensor data fusion is proposed to derive the relative motion states between two noncooperative ***,the design model of the proposed algorithm is introduced,including the derivation of the state propagation and measurement ***,models for the sensor and actuator are introduced,and the effects of various factors on the sensors and actuators are *** square-root unscented Kalman filter is used to design the angles-only navigation filtering ***,the Clohessy-Wiltshire terminal guidance algorithm is introducedto obtain the theoretical relative motion trajectories during the rendezvous operations of two noncooperative ***,the effectiveness of the proposed angles-only navigation algorithm is verified using a semi-physical simulation *** results prove that an optical navigation camera combined with average accelerometers and occasional orbital maneuvers is feasible for spacecraft noncooperative rendezvous using angles-only navigation.

关键词： angles-only navigation feasibility analysis multisensor data fusion spacecraft noncooperative rendezvous