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Polymer-based ?exible bioelectronics

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Science Bulletin 2019年第9期64卷 634-640页

作者： Xiaoying Wu Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Scienceand Laboratory of Advanced MaterialsFudan University

Due to the mechanical mismatch between conventional rigid electronic devices and soft tissues at nature,a lot of interests have been attracted to develop Flexible bioelectronics that work well both in vitro and in vivo. To this end, polymers that can be used for both key components and substrates are indispensable to achieve high performances such as high sensitivity and long-term stability for sensing applications.Here we will summarize the recent advances on the synthesis of a variety of polymers, the design of typical architectures and the integration of different functions for the Flexible bioelectronic devices. The remaining challenges and promising directions are highlighted to provide inspirations for the future study on the emerging Flexible bioelectronics at end.

关键词： Polymer Flexible Stretchable Multi-functional Bioelectronic device

Design of a Flexible end-effector based on characteristics of tomatoes

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International Journal of Agricultural and Biological Engineering 2022年第24期15卷 13-24页

作者： Kehong Zhou Liru Xia Jun Liu Mingyan Qian Jie Pi Institute of Agricultural Engineering Jiangsu UniversityZhenjiang 212001China Institute of Agricultural Facilities and Equipment Jiangsu Academy of Agricultural SciencesKey Laboratory of Protected Agriculture Engineering in the Middle and Lower Reaches of Yangtze RiverMinistry of Agriculture and Rural AffairesNanjing 210014China

The end-effector is the last executing part of the interaction between robots and fruits.In this study,the physical characteristics of tomatoes and the tomato end-effector of the fluidic elastomer actuator type were studied.There was no correlation between the test point,the mass,the size and the rupture force of tomatoes.The non-destructive clamping force of tomatoes was 11.13 N.There were statistically significant correlations between the number of finger chambers,the transverse diameter of tomatoes,the inflation pressure and the clamping force.The inflation pressure and the size of tomatoes were directly proportional to the clamping force.Since fingers with more chambers had higher flexibility,the number of chambers was inversely proportional to the slope of the horizontal force-pressure curve,and the number of chambers was directly proportional to the angle between the total clamping force and the horizontal direction.A Flexible end-effector was designed by genetic algorithm according to the physical characteristics of tomatoes and the simulation results of the finger of the end-effector.The test results of the end-effector showed that the tomatoes would be successfully clamped by the end-effector composed of three four-chamber fingers in a static situation with the inflation pressure less than the optimized inflation pressure(28.293 kPa).When in a dynamic situation,the success rate of tomatoes being clamped by the end-effector with an inflation pressure of 29 kPa was 97%.The tomatoes in the static clamping test and the dynamic clamping test were not damaged.

关键词： end-effector fluid elastomer actuator non-destructive Flexible genetic algorithm characteristics of tomatoes

A Novel Flexible Antenna at Very High Frequency Band for On-Body Applications

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Journal of Beijing Institute of Technology 2022年第1期31卷 81-90页

作者： Abhishek Kandwal Huajie Tang Pengfei Ao Kun Wang Jingzhen Li Yuhang Liu Tobore Igbe Zedong Nie Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

This paper proposes a novel Flexible antenna design operating at very high frequency(VHF)band for on-body applications such as human body communication(HBC).The antenna consists of back-to-back E-shaped fractal and complimentary structures designed over a thin flex-ible substrate.The overall design working on the principle of fractal geometries and capacitive coupling is highly beneficial to achieve better antenna characteristics even at low frequencies around 35 MHz-45 MHz that are being used for HBC application.The proposed antenna obtained a large bandwidth of around 10.0 MHz in air and a bandwidth of around 8.0 MHz during on-body opera-tion.The antenna has been tested in three different scenarios viz.air,on-body single antenna and on-body communication using two antennas.The insertion loss is reduced to a minimum in all three scenarios,which is quite beneficial for better signal transmission.The size miniaturization with high flexibility in such low frequencies has also been achieved in the paper that makes the proposed design suitable for human body communication applications.

关键词： antenna very high frequency(VHF) human body communication(HBC) bandwidth loss Flexible

多酸用于柔性透明压电纳米发电机的电极材料以高效收集环境中的机械能（英文）

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Science Bulletin 2020年第1期65卷 35-44,M0004页

作者：何鹏陈维林李建平张宏李允伍王恩波 Key Laboratory of Polyoxometalate Science of Ministry of Education Faculty of Chemistry Northeast Normal University Changchun 130024 China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical Engineering Liaocheng University Liaocheng 252059 China

近年来,压电纳米发电机逐渐成为一种颇有前途的能量收集设备.然而,传统的压电纳米发电机的电极多采用贵金属材料,这大大增加了设备的成本.本文提出了一种以多金属氧酸盐(多酸)为电极材料的柔性透明的压电纳米发电机,它可以高效地将环境... 详细信息

近年来,压电纳米发电机逐渐成为一种颇有前途的能量收集设备.然而,传统的压电纳米发电机的电极多采用贵金属材料,这大大增加了设备的成本.本文提出了一种以多金属氧酸盐(多酸)为电极材料的柔性透明的压电纳米发电机,它可以高效地将环境中的机械能转换为电能.选用了5种不同的多酸作电极材料,并对压电纳米发电机的各项性能进行了测试.结果表明,纳米发电机的性能与多酸的能级有关,多酸与氧化锌的能级差可以用来评估电子注入的动力.利用多酸制备的柔性透明的压电纳米发电机具有应用于智能窗和可穿戴设备的潜力.

关键词： Polyoxometalate Flexible Transparent Piezoelectric nanogenerator Electrode materials

A Flexible nickel phthalocyanine resistive random access memory with multi-level data storage capability

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Journal of Materials Science & Technology 2021年第27期86卷 151-157页

作者： Tariq Aziz Yun Sun Zu-Heng Wu Mustafa Haider Ting-Yu Qu Azim Khan Chao Zhen Qi Liu Hui-Ming Cheng Dong-Ming Sun Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang110016China University of Chinese Academy of Sciences 19A Yuquan RoadBeijing100049China School of Material Science and Engineering University of Science and Technology of China72 Wenhua RoadShenyang110016China Key Laboratory of Microelectronic Devices&Integrated Technology Institute of MicroelectronicsChinese Academy of Sciences3 Bei-Tu-Cheng West RoadBeijing100029China Pak-Austria Fachhochschule:Institute of Applied Sciences and Technology MangKhanpur RoadHaripurKPKPakistan NUS Graduate School Integrative Sciences and Engineering ProgrammeNational University of Singapore119077Singapore Frontier Institute of Chip and System Fudan University2005 Songhu RoadShanghai 200433China Shenzhen Geim Graphene Center Shenzhen International Graduate SchoolTsinghua University1001 Xueyuan RoadShenzhen518055China

Metal phthalocyanine is considered one of the most promising candidates for the design and fabrication of Flexible resistive random access memory(RRAM)devices due to its intrinsic flexibility and excellent functionality.However,performance degradation and the lack of multi-level capability,which can directly expand the storage capacity in one memory cell without sacrificing additional layout area,are the primary obstacles to the use of metal phthalocyanine RRAMs in information storage.Here,a Flexible RRAM with pristine nickel phthalocyanine(Ni Pc)as the resistive layer is reported for multi-level data storage.Due to its high trap-concentration,the charge transport behavior of the device agrees well with classical space charge limited conduction controlled by traps,leading to an excellent performance,including a high on-off current ratio of 10^(7),a long-term retention of 10^(6)s,a reproducible endurance over6000 cycles,long-term flexibility at a bending strain of 0.6%,a write speed of 50 ns under sequential bias pulses and the capability of multi-level data storage with reliable retention and uniformity.

关键词： Flexible Metal phthalocyanine Resistive random access memory Multi-level

Long-term Flexible penetrating neural interfaces:materials, structures, and implantation

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Science China(Information Sciences) 2021年第12期64卷 5-22页

作者： Chi GU Jianjuan JIANG Tiger H.TAO Xiaoling WEI Liuyang SUN State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences University of Chinese Academy of Sciences School of Physical Science and Technology Shanghai Tech University Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Science 52020 X-Lab Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences Shanghai Research Center for Brain Science and Brain-Inspired Intelligence Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of Sciences

Penetrating neural interface, which collects the neural electrophysiological signal and serves as a key component in brain-computer interface, has drawn great attention recently. The instability of chronic recording is the main challenge for the conventional neural interface. Novel neural probes with improved long-term performance have been developed based on advanced materials and engineered structures. Here, we review these emergent innovations contributing to chronic stable recording from the perspectives of materials,structures, and implantation methods. These advances make possible further developments in neuroscience research related to neural decoding, neural circuit mechanism analysis, and neurological disease treatment.

关键词： neural interface long-term Flexible minimally invasive biocompatibility

Emerging CoMn-LDH@MnO2 electrode materials assembled using nanosheets for Flexible and foldable energy storage devices

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Journal of Energy Chemistry 2020年第6期29卷 67-73,I0003页

作者： Yue Zhao Jiafeng He Meizhen Dai Depeng Zhao Xiang Wu Baodan Liu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870LiaoningChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina

CoMn layered double hydroxides(CoMn-LDH)are promising electrode materials for supercapacitors because of their excellent cyclic stability.However,they possess relatively low capacitances.In this work,hybrid CoMn-LDH@MnO2 products grown on Ni foams were obtained through a facile hydrothermal method.The as-synthesized samples employed as electrodes deliver a specific capacitance of 2325.01 F g^-1 at 1 A g^-1.An assembled asymmetric supercapacitor using these products as positive electrodes shows a maximum energy density of 59.73 W h kg^-1 at 1000.09 W kg^-1.The prominent electrochemical performance of the as-prepared electrodes could be attributes to hierarchical structures.These findings suggest that hybrid structures might be potential alternatives for future Flexible energy storage devices.

关键词： CoMn-LDH@MnO2 electrode Specific capacitance Flexible device Cyclic stability

柔性一体化储能器件在弯曲状态下的力学有限元模拟分析

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Science China Materials 2021年第9期64卷 2182-2192页

作者：袁子舜姚敏杰张楠楠王帅芮先宏张其春牛志强 Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage CenterCollege of ChemistryNankai UniversityTianjin 300071China School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China Department of Materials Science and Engineering City University of Hong KongKowloon 999077Hong KongChina

近年来,关于柔性储能器件设计的研究越来越多,然而对其在弯曲状态下力学行为的研究还不够系统,人们对于器件结构所带来的力学行为影响的认识也不够全面.在本文中,我们通过有限元模拟的方法系统全面地研究了柔性一体化储能器件在弯曲状... 详细信息

近年来,关于柔性储能器件设计的研究越来越多,然而对其在弯曲状态下力学行为的研究还不够系统,人们对于器件结构所带来的力学行为影响的认识也不够全面.在本文中,我们通过有限元模拟的方法系统全面地研究了柔性一体化储能器件在弯曲状态下的力学行为.本文主要研究了电极和电解质的厚度,模量以及泊松比对整个器件在弯曲状态下应变能以及应力应变分散的影响,所得到的分析结果将为设计拥有更优异力学性能的一体化储能器件提供指导.

关键词： energy storage devices all-in-one Flexible finite element method mechanical analysis

A Review on Swarm Intelligence and Evolutionary Algorithms for Solving Flexible Job Shop Scheduling Problems

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IEEE/CAA Journal of Automatica Sinica 2019年第4期6卷 904-916页

作者： Kaizhou Gao Zhiguang Cao Le Zhang Zhenghua Chen Yuyan Han Quanke Pan IEEE the Macao Institute of Systems Engineering at Macao University of Science and Technology 999078 China School of Computer at Liaocheng Univeristy Liaocheng252059China the Department of Industrial Systems Engineering and Management National University of SingaporeSingapore Centre for Maritime Studies National University of SingaporeSingapore the Institute for Infocomm Research(I2R) the Agency for ScienceTechnology and Research(A*STAR)Singapore the School of Computer at Liaocheng Univeristy Liaocheng 252059China School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200072China

Flexible job shop scheduling problems(FJSP)have received much attention from academia and industry for many years.Due to their exponential complexity,swarm intelligence(SI)and evolutionary algorithms(EA)are developed,employed and improved for solving them.More than 60%of the publications are related to SI and EA.This paper intents to give a comprehensive literature review of SI and EA for solving FJSP.First,the mathematical model of FJSP is presented and the constraints in applications are summarized.Then,the encoding and decoding strategies for connecting the problem and algorithms are reviewed.The strategies for initializing algorithms?population and local search operators for improving convergence performance are summarized.Next,one classical hybrid genetic algorithm(GA)and one newest imperialist competitive algorithm(ICA)with variables neighborhood search(VNS)for solving FJSP are presented.Finally,we summarize,discus and analyze the status of SI and EA for solving FJSP and give insight into future research directions.

关键词： Evolutionary algorithm Flexible job shop scheduling review swarm intelligence