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Investigation of Punch Resistance of the Allomyrira dichtoloma Beetle Forewing

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Journal of Bionic Engineering 2018年第1期15卷 57-68页

作者： Ngoc San Ha Vinh Tung Le Nam Seo Goo smart microsystem research laboratory Department of Advanced Technology Fusion Division of Interdisciplinary Studies Konkuk University Seou105029 Republic of Korea Faculty of Science Engineering and Technology Swinburne University of Technology Hawthorn VIC 3122 Australia

In this study, the punch resistance of the beetle forewing was investigated to address the ability of the forewing against the external force. The punch resistance of the forewing was measured for different sizes and sexes of beetles using a conventional testing method in conjunction with the Digital Image Correlation （DIC） technique. The results showed that the maximum fracture load was measured around 23 N for the female beetle and around 20.2 N for the male beetle in the front-side punch test. Moreover, the fracture load in the front-side punch test was higher than that in the back-side punch test for both male and female beetles. This means that the beetle forewing plays a protection role against external loads. Furthermore, the puncture energy in the front-side punch test for the female beetle （6.91 m J） was a little higher than that for the male beetle （5.27 mJ）. In addition, the DIC results revealed that the first crack occurred along the trachea line and the second crack then appeared in the direction that was perpendicular to the direction of the first crack. This study provides a com- prehensive understanding of the mechanical protection properties of the beetle forewing and offers a good lesson for studying lightweight bio-inspired composite material.

关键词： beetle forewing punch test punch energy digital image correlation

A motion characteristics modeled angular position sensor by nonlinear transfer of differential capacitance for miniaturized scanning mirrors

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microsystems & Nanoengineering 2023年第6期9卷 129-147页

作者： Songtao Liu Gaofei Zhang Lingyun Zhang Junya Wang Minghao Gong Zheng You Department of Precision Instrument Tsinghua UniversityBejing 100084China Key laboratory of smart microsystem(Tsinghua University) Ministry of EducationBeijing 100084China State Key laboratory of Precision Measurement Technology and Instruments Tsinghua UniversityBeijing 100084China School of Mechanical Science&Engineer Huazhong University of Science and TechnologyWuhan 430074China

In this paper,an angular position sensor(APS)designed for a resonant miniaturized scanning mirror(M-SM)is *** APS operates based on the principle of differential variable capacitance,significantly expanding the detectable bandwidth from a few hertz to several *** modeling the motion characteristics,the sampling rates of the biaxial scanning angles are 1473.6 times and 539.4 times higher than those of conventional ***,the motion characteristics model is presented as a simple harmonic motion,converting sampled capacitance into continuous ***,the nonparallel state of the M-SM and sensor is transformed into a parallel state through the space coordinate system ***,a 2D nonlinear angle transfer function is developed to convert the differential capacitance into an angle,thereby mitigating the nonlinear errors resulting from large *** an accuracy better than 0.014°,the measuring range expands from±0.5729°(±10 mrad)to±5.026°(±87 mrad).Additionally,the capturing mode and tracking mode are proposed to monitor real-time angular changes of the M-SM with an accuracy of 0.017°.High-precision APSs have enhanced beam pointing accuracy and resolution and can thereby be used to advance the development of laser components,including light detection and ranging(LiDAR).

关键词： capacitance angular nonlinear

2.4 V ultrahigh-voltage aqueous MXene-based asymmetric micro-supercapacitors with high volumetric energy density toward a self-sufficient integrated microsystem

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Fundamental research 2024年第2期4卷 307-314页

作者： Yuanyuan Zhu Shuanghao Zheng Jieqiong Qin Jiaxin Ma Pratteek Das Feng Zhou Zhong-Shuai Wu State Key laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Shijingshan DistrictBeijing 100049China College of Science Henan Agricultural UniversityZhengzhou 450002China Dalian National laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China Key laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes Suzhou UniversitySuzhou 234000China

Two-dimensional MXenes are key high-capacitance electrode materials for micro-supercapacitors(MSCs)catering to integrated ***,the narrow electrochemical voltage windows of conventional aqueous electrolytes(≤1.23 V)and symmetric MXene MSCs(typically≤0.6 V)substantially limit their output voltage and energy *** concentrated aqueous electrolytes exhibit lower water molecule activity,which inhibits water splitting and consequently widens the operating voltage ***,we report ultrahigh-voltage aqueous planar asymmetric MSCs(AMSCs)based on a highly concentrated LiCl-gel quasi-solid-state electrolyte with MXene(Ti3C2Tx)as the negative electrode and MnO_(2) nanosheets as the positive electrode(MXene//MnO_(2)-AMSCs).The MXene//MnO_(2)-AMSCs exhibit a high voltage of up to 2.4 V,attaining an ultrahigh volumetric energy density of 53 mWh cm−***,the in-plane geometry and the quasi-solid-state electrolyte enabled excellent mechanical flexibility and performance uniformity in the serially/parallel connected packs of our ***,the MXene//MnO_(2)-AMSC-based integrated microsystem,in conjunction with solar cells and consumer electronics,could efficiently realize simultaneous energy harvesting,storage,and *** findings of this study provide insights for constructing high-voltage aqueous MXene-based AMSCs as safe and self-sufficient micropower sources in smart integrated microsystems.

关键词： Asymmetric micro-supercapacitors MXene MnO_(2) Aqueous electrolyte High voltage Integrated microsystem

Fabrication of thick BOX SOI by smart-cut technology

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Nuclear Science and Techniques 2003年第2期14卷 115-118页

作者： WU Yan-Jun, ZHANG Miao, AN Zheng-Hua, LIN Cheng-Lu(State Key laboratory of Functional Materials for Informatics, Shanghai Institute of microsystem and Information Technology,the Chinese Academy of Sciences, Shanghai 200050) Shanghai Institute of microsystem and Information Technology the Chinese Academy of Sciences State Key Laboratory of Functional Materials for Informatics 上海 200050

A SOI material with thick BOX (2.2 μm) was successfully fabricated using the smart-cut technology. The thick BOX SOI microstructures were investigated by high resolution cross-sectional transmission electron microscopy (XTEM), while the electrical properties were studied by the spreading resistance profile (SRP). Experimental results demonstrate that both structural and electrical properties of the SOI structure are very good.

关键词：灵活切割技术微观结构截面透射电子显微镜 XTEM 电学特性绝缘硅片 SOI

Rolling origami with smart materials

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Science Bulletin 2019年第15期64卷 1080-1082页

作者： Yang Wang Xing Li Borui Xu Ziao Tian Zengfeng Di Yongfeng Mei Department of Materials Science Fudan UniversityShanghai200433China State Key laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China

Three-dimensional (3D) functional devices have become an interesting topic meeting the challenge of device miniaturization and high integration in electron devices and microelectromechanical systems. Based on this exciting situation, origami in micro/nanoscale combining art and advanced science was widely utilized to transform two-dimensional (2D) sheets into 3D microstructures for various applications, such as micro-grippers [1](Fig. 1a).

关键词： origami materials challenge

Cu gettering to nanovoids in SOI materials

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Science China(Technological Sciences) 2003年第1期46卷 60-70页

作者：张苗吴雁军刘卫丽安正华林成鲁朱剑豪 State Key laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and information Technology Chinese Academy of Sciences Shanghai 200050 China Department of Physics and Materials City University of Hong Kong China Correspondence should be addressed to Zhang Miao

In this paper, the gettering of Cu impurities in silicon-on-insulator (SOI)materials is studied. Nanovoids are formed in the substrate of SOI beneath the buried oxide (BOX) byroom temperature H^+ (3.5 x 10^(16) / cm^2) or He^+ (9 x 10^(16) / cm^2) implantation andsubsequent annealing at 700℃. The gettering of different doses of Cu (5 x10^(13)/cm^2, 5x10^(14)/cm^2, 5 x 10^(15)/cm^2), which are introduced in the top Si layer by ion implantation, to thenanovoids are investigated by cross-section transmission electron microscopy (XTEM) and secondaryion mass spectroscopy (SIMS). The results demonstrate that Cu impurities in the top Si layer candiffuse through the buried oxide (BOX) layer of SIMOX and smart-Cut SOI at temperature above 700℃and be trapped by the nanovoids. Some of Cu impurities can be captured by the intrinsic defects atthe BOX interface of SIMOX, but will be released out at high temperatures. The gettering effect ofSIMOX intrinsic defects at BOX is much rower than that of the nanovoids. No Cu impurities aretrapped at the perfect BOX interfaces of smart-Cut SOI. After 1000℃ annealing, high dose of Cu (3.6x 10^(15)/cm^2) was gettered by the nanovoids. The Cu gettering efficiency to the nanovoidsincreased with the decreasing of Cu doses. When the Cu doses in the top Si layer were lower than 4 x10^(15) /cm^2, nanovoids could getter more than 90% of the Cu impurities and reduce the Cuconcentration in the top Si layer to less than 4%. The results indicate that nanovoids gettering isa promising method for removing the impurities in SOI materials.

关键词： SOI, gettering, ion implantation, nanovoids.

A Trusted Multi-Task Distribution Mechanism for Internet of Vehicles Based on smart Contract

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China Communications 2023年第4期20卷 212-226页

作者： Xujie Li Yuan Xu Jing Tang Ying Sun Shaoshuai Fan Fei Shen College of Computer and Information Hohai UniversityNanjing 210098China State Key laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China School of Information Engineering Jiangsu Open UniversityNanjing 210017China Shanghai Institute of microsystem and Information Technology Chinese Academy of SciencesShanghai 200050China

In this paper,a trusted multi-task distribution mechanism for Internet of Vehicles based on smart contract is proposed to improve the security and efficiency for the task distribution in Internet of ***,a three-tier trusted multi-task distribution framework is presented based on smart *** smart contract will be triggered by the task *** the important part of the smart contract,the task distribution algorithm is stored on the blockchain and run *** the process of the task distribution,the cost of the task distribution and the system stability play a critical ***,the task distribution problem is formulated to minimize the cost of the task distribution whilst maintaining the stability of the system based on Lyapunov ***,this problem is a mixed integer nonlinear programming problem with NP-hard *** tackle this,the optimization problem is decomposed into two sub problems of computing resource allocation and task distribution decision,and an effective task distribution algorithm is *** results show that the proposed algorithm can effectively improves system performance.

关键词： task distribution resource allocation Lyapunov optimization smart contract

Multifunctional Semiconducting Fibers for Visual Detection of Sarin Gas

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Advanced Fiber Materials 2023年第5期5卷 1632-1642页

作者： Maomao Yao Ruilong Zhou Mingshuai Yuan Haoyu Wang Le Wang Hengda Sun Yanyan Fu Ru Xiao Hongzhi Wang Gang Wang Meifang Zhu State Key laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

There is a growing need for protective instruments that can be used in extreme environments,including those encountered during exoplanet exploration,anti-terrorism activities,and in chemical *** instruments should have the ability to detect external threats visually and monitor internal physiological signals in real time for maximum *** address this need,multifunctional semiconducting fibers with visual detection ranging from yellow to red and near-field communication(NFC)capabilities have been developed for use in personal protective clothing.A composite conductive yarn with semiconducting fluorescent probe molecules is embroidered on the clothing,forming an NFC coil that allows for the visual monitoring of atmospheric safety through color *** fluorescence detection system was able to selectively detect diethyl chlorophosphate(DCP),a substitute for the toxic gas sarin,with a detection limit of 6.08 ppb,which is lower than the life-threatening concentration of sarin ***,an intelligent protective suit with the abovementioned dual functions was fabricated with good mechanical cycle stability and ***-time physiological signals such as the temperature and humidity of the wearer could be read through the NFC *** intelligent protective suits can quickly provide an early warning to the identified low-dose DCP and evaluate the health of wearer according to the changes in physiological *** study offers a smart,low-cost strategy for designing intelligent protective devices for extreme environments.

关键词： Multifunctional semiconducting fibers Visual detection Near-field communication(NFC) Fluorescence detection Intelligent protective suits

Neighbor-Aware Multiple Access Protocol for 5G m MTC Applications

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China Communications 2016年第S2期13卷 80-88页

作者： Yang Yang Guannan Song Wuxiong Zhang Xiaohu Ge Chengxiang Wang Key Lab of Wireless Sensor Networks & Communications Shanghai Institute of Microsystem and Information Technology (SIMIT) Chinese Academy of Sciences Shanghai research Center for Wireless Communications University of Chinese Academy of Sciences School of Electronic Information and Communications Huazhong University of Science and Technology (HUST) Institute of Sensors Signals and Systems School of Engineering and Physical Sciences Heriot-Watt University

In order to support massive Machine Type Communication(mMTC) applications in future Fifth Generation(5G) systems,a key technical challenge is to design a highly effective multiple access protocol for massive connection requests and huge traffic load from all kinds of smart devices,***,watch,phone,ring,glasses,shoes,etc..To solve this hard problem in distributed scenarios with massive competing devices,this paper proposes and evaluates a Neighbor-Aware Multiple Access(NAMA) protocol,which is scalable and adaptive to different connectivity size and traffic *** exploiting acknowledgement signals broadcasted from the neighboring devices with successful packet transmissions,NAMA is able to turn itself from a contention-based random access protocol to become a contention-free deterministic access protocol with particular transmission schedules for all neighboring devices after a short transition *** performance of NAMA is fully evaluated from random state to deterministic state through extensive computer simulations under different network sizes and Contention Window(CW)*** with traditional IEEE802.11 Distributed Coordination Function(DCF),for a crowded network with 50 devices,NAMA can greatly improve system throughput and energy efficiency by more than 110%and210%,respectively,while reducing average access delay by 53%in the deterministic state.

关键词： neighbor-aware multiple access contention-based random access contention-free deterministic access ACK signal 802.11 DCF