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Nano Research 2021年第9期14卷 3096-3111页

作者： Kyowon Kang Jaejin Park Kiho Kim Ki Jun Yu School of Electrical and Electronic Engineering YU-KIST InstituteYonsei UniversitySeoul 03722Republic of Korea

Recently,flexible pressure sensors have gained substantial research interest in bioelectronics because they can monitor the conditions of various organs,enable early diagnosis of diseases,and provide precise medical treatment by applying them to various parts of the *** particular,inorganic materials,metal and carbon-based materials are broadly used in novel structured pressure sensors from wearable devices to implantable *** the excellent electronic properties,distinctive morphologies,and remarkable mechanical and chemical stability of these materials,it is expected that these flexible pressure sensors can be the basis for new methods for human *** article covers an extensive review of the inorganic,metal and carbon-based flexible pressure sensor design strategies and sensing mechanisms studied in recent years for diverse applications such as tactile sensors,arterial pulse sensors,intracranial pressure sensors,intraocular pressure sensors,and bladder pressure *** section provides an overview by introducing the recent progress in flexible pressure sensors.

关键词： nanomaterial inorganic carbon pressure sensor wearable device implantable device

Carbon nanotube cuprous oxide composite based pressure sensors

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Chinese Physics B 2012年第1期21卷 329-333页

作者： Kh.S.Karimov Muhammad Tariq Saeed Chani Fazal Ahmad Khalid Adam Khan Rahim Khan GIK Institute of Engineering Sciences and Technology Topi 23640District SwabiPakistan Physical Technical Institute of Academy of Sciences Rudaki Ave.33Dushanbe 734025Tajikistan

In this paper, we present the design, the fabrication, and the experimental results of carbon nanotube （CNT） and Cu20 composite based pressure sensors. The pressed tablets of the CNT Cu20 composite are fabricated at a pressure of 353 MPa. The diameters of the multiwalled nanotubes （MWNTs） are between 10 nm and 30 nm. The sizes of the Cu20 micro particles are in the range of 3-4 μm. The average diameter and the average thickness of the pressed tablets are 10 mm and 4.0 mm, respectively. In order to make low resistance electric contacts, the two sides of the pressed tablet are covered by silver pastes. The direct current resistance of the pressure sensor decreases by 3.3 times as the pressure increases up to 37 kN/m^2. The simulation result of the resistance-pressure relationship is in good agreement with the experimental result within a variation of ±2%.

关键词： carbon nanotubes Cu20 micro-powder pressure sensor simulation

Revolutionizing Thermal Stability and Self‑Healing in pressure sensors:A Novel Approach

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Advanced Fiber Materials 2023年第6期5卷 2028-2039页

作者： Su Bin Choi Jagan Singh Meena Jong‑Woong Kim Department of Smart Fab Technology Sungkyunkwan UniversitySuwon 16419Republic of Korea Research Center for Advanced Materials Technology Core Research InstituteSungkyunkwan UniversitySuwon 16419Republic of Korea School of Mechanical Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea

Soft electronics,which require mechanical elasticity,rely on elastic materials that have both a small Young’s modulus and a large elastic strain *** materials,however,are prone to damage when stress accumulates,presenting a significant challenge for soft *** address this issue,the integration of self-healing functionality into these materials appears to be a promising *** covalent bond chemistry has been utilized to design high-strength polymers with controllable ***,the temperature needed to trigger self-healing may induce thermal damage to other parts of the *** contrast,if the self-healing temperature is reduced,the device might suffer damage when exposed to temperatures exceeding the self-healing point due to the low stability of the polymer at high *** challenges highlight the need for materials that can self-heal at low temperatures while maintaining thermal stability at high *** response to this challenge,we propose a novel approach that involves forming a microfibrous network using polycaprolactone(PCL),a material with a low melting temperature of 60°C that is widely utilized in shape memory and self-healing *** fabricated the conductive fiber by encapsulating a microfiber PCL network with MXene *** MXene nanosheets were seamlessly coated on the PCL fiber’s surface to prevent shape deformation at high ***,they exhibited high thermal conductivity,facilitating rapid internal heat ***,the MXene/PCL microfiber networks demonstrated self-healing capabilities at 60°C and thermal stability above 200°*** makes them potentially suitable for stretchable,self-healing electronic devices that need to withstand high temperatures.

关键词： Fibers MXene Self-healing pressure sensor Thermal stability Electrospinning

Silver Nanowire Electrodes: Conductivity Improvement Without Post-treatment and Application in Capacitive pressure sensors

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Nano-Micro Letters 2015年第1期7卷 51-58页

作者： Jun Wang Jinting Jiu Teppei Araki Masaya Nogi Tohru Sugahara Shijo Nagao Hirotaka Koga Peng He Katsuaki Suganuma State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology The Institute of Scientific and Industrial Research Osaka University

Transparent electrode based on silver nanowires(Ag NWs) emerges as an outstanding alternative of indium tin oxide film especially for flexible electronics. However, the conductivity of Ag NWs transparent electrode is still dramatically limited by the contact resistance between nanowires at high transmittance. Polyvinylpyrrolidone(PVP) layer adsorbed on the nanowire surface acts as an electrically insulating barrier at wire–wire junctions, and some devastating post-treatment methods are proposed to reduce or eliminate PVP layer, which usually limit the application of the substrates susceptible to heat or pressure and burden the fabrication with high-cost, time-consuming, or inefficient processes. In this work, a simple and rapid pre-treatment washing method was proposed to reduce the thickness of PVP layer from 13.19 to0.96 nm and improve the contact between wires. Ag NW electrodes with sheet resistances of 15.6 and 204 X sq-1have been achieved at transmittances of 90 and 97.5 %, respectively. This method avoided any post-treatments and popularized the application of high-performance Ag NW transparent electrode on more substrates. The improved Ag NWs were successfully employed in a capacitive pressure sensor with high transparency, sensitivity, and reproducibility.

关键词： Silver nanowire Pre-treatment Transparent electrode pressure sensor

Modeling of pressure sensors based on two-dimensional photonic crystals

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Frontiers of Optoelectronics 2009年第2期2卷 219-221页

作者： Xuehui XIONG Ping LU Deming LIU College of Optoelectronic Science and Engineering Huazhong University of Science and Technology School of Physics and Information Engineering Jianghan University

A pressure sensor based on the twodimensional photonic crystal(2D PC) has been *** the condition of different pressure, the photonic band gap of the sensor has been studied by means of the plane wave expansion method(PWM). The results show that there is a good linear relation between the cutoff wavelength and the pressure. Apart from being easily implemented, the presented 2D PC pressure sensor holds many characteristics such as high-pressure sensitivity and convenience in achieving demanded pressure range.

关键词： pressure sensor photonic crystal (PC) photonic band gap plane wave expansion method (PWM) sensitivity

Review on pressure sensors for Structural Health Monitoring

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Photonic sensors 2017年第4期7卷 294-304页

作者： Samiksha SIKARWAR Satyendra Shakti SINGH Bal Chandra YADAV Department of Applied Physics Babasaheb Bhimrao Ambedkar University Lucknow 226025 India

This paper reports the state of art in a variety of pressure and the detailed study of various matrix based pressure sensors. The performances of the bridges, buildings, etc. are threatened by earthquakes, material degradations, and other environmental effects. Structural health monitoring （SHM） is crucial to protect the people and also for assets planning. This study is a contribution in developing the knowledge about self-sensing smart materials and structures for the construction industry. It deals with the study of self-sensing as well as mechanical and electrical properties of different matrices based on pressure sensors. The relationships among the compression, tensile strain, and crack length with electrical resistance change are also reviewed.

关键词： Strain crack detection self-sensing smart materials cement pressure sensor

强健超弹的蜘蛛网状聚酰亚胺纤维基导电复合气凝胶用于极端温度下的线性压力传感器

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Science China Materials 2023年第7期66卷 2829-2842页

作者：杨文科刘虎杜厚义张旻悦王春枫尹锐潘曹峰刘春太申长雨 Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China China Astronaut Research and Training Center Beijing 100094China

压力传感器是人工触觉感应的基石.尽管人们对高性能压力传感器进行了广泛的研究,但解决传感器的高灵敏度、宽线性响应范围和宽工作温度范围仍然面临巨大挑战.在此,我们创新性地应用三乙胺实现了疏水聚酰亚胺纤维(PIFs)在碳纳米管(CNT)... 详细信息

压力传感器是人工触觉感应的基石.尽管人们对高性能压力传感器进行了广泛的研究,但解决传感器的高灵敏度、宽线性响应范围和宽工作温度范围仍然面临巨大挑战.在此,我们创新性地应用三乙胺实现了疏水聚酰亚胺纤维(PIFs)在碳纳米管(CNT)水溶液中的均匀分散,同时纤维的结构不会受到破坏,并利用冻干和热酰亚胺化技术制备了强健超弹的蜘蛛网状(PIF/CNT)导电复合气凝胶.该气凝胶作为压力传感器具有宽线性感应范围(0.01-53.34 kPa)、超低检测限(10 Pa)、高灵敏度(0.507 kPa^(-1))、快速响应/恢复时间(85/80 ms)、稳定的快速压缩响应(500 mm min^(-1))和优异的抗循环疲劳能力(5000次)等优异的传感性能.有限元分析表明,多级纤维网络有利于相邻的导电纤维之间的接触面积在外部压力下有明显的线性变化,使之表现出优异的线性传感性能.该传感器可用于人体生理和运动信号检测、电子皮肤和智能控制,且在极端温度(-100-300℃)下表现出出色的传感稳定性和热绝缘性,可用于极端太空环境下太空服和月球/火星栖息地充气结构的传感单元.本工作为开发下一代线性压力传感器提供了一个简单有效的方法.

关键词： polyimide fibre superelastic aerogel pressure sensor linear sensing environmental tolerance

Highly Sensitive Flexible pressure sensors based on Graphene/Graphene Scrolls Multilayer Hybrid Films

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Chinese Journal of Chemical Physics 2020年第3期33卷 365-370,I0005-I0010,I0003页

作者： Yi-heng Zhai Tao Wang Zhi-kai Qi Xiang-hua Kong Hang-xun Xu Heng-xing Ji School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Department of Applied Chemistry CAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026China

In recent years,flexible pressure sensors have attracted much attention owing to their potential applications in motion detection and wearable *** a result,important innovations have been reported in both conductive materials and the underlying substrates,which are the two crucial components of a pressure sensor.1D materials like nanowires are being widely used as the conductive materials in flexible pressure sensors,but such sensors usually exhibit low performances mainly due to the lack of strong interfacial interactions between the substrates and 1D *** this paper,we report the use of graphene/graphene scrolls hybrid multilayers films as the conductive material and a microstructured polydimethylsiloxane substrate using Epipremnum aureum leaf as the template to fabricate highly sensitive pressure *** 2D structure of graphene allows to strongly anchor the scrolls to ensure the improved adhesion between the highly conductive hybrid films and the patterned *** attribute the increased sensitivity(3.5 k Pa^-1),fast response time(pressure sensor to the synergistic effect between the 1D scrolls and 2D graphene *** results demonstrate that these sensors are promising for electronic skins and motion detection applications.

关键词： pressure sensor Graphene scrolls Hybrid films Electronic skins

Body-area sensor network featuring micropyramids for sports healthcare

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Nano Research 2023年第1期16卷 1330-1337页

作者： Shenglong Wang Weili Deng Tao Yang Guo Tian Da Xiong Xiao Xiao Hongrui Zhang Yue Sun Yong Ao Junfeng Huang Jun Chen Weiqing Yang Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiao tong UniversityChengdu 610031China Department of Bioengineering University of CaliforniaLos AngelesLos AngelesCA 90095USA

Monitoring physiological signals of the human body can provide extremely important information for sports healthcare,preventing injuries and providing efficient guidance for individual ***,the signals related to human healthcare involve both subtle and vigorous signals,making it difficult for a sensor to satisfy the full-scale monitoring at the same ***,a novel conductive elastomer featuring homogeneously micropyramid-structured PDMS/CNT composite is used to fabricate highperformance piezoresistive sensors by a drop-casting *** from the significant increase in the contact area of microstructure during deformation,the flexible sensor presents a broad detection range(up to 185.5 kPa),fast response/recovery time(44/13 ms),ultrahigh sensitivity(242.4 kPa–1)and excellent durability over 8,000 *** a proof of concept,the as-fabricated pressure sensor can be used for body-area sports healthcare,and enable the detection of full-scale pressure *** the fabulous sensing performance,the sensor may potentially become promising in personal sports healthcare and telemedicine monitoring.

关键词： pressure sensor pyramidal microstructure sports healthcare sensor network broad detection range high sensitivity

Flexible electronic eardrum

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Nano Research 2017年第8期10卷 2683-2691页

作者： Yang Gu Xuewen Wang Wen Gu Yongjin Wu Tie Li Ting Zhang Suzhou Institute of Nano-Tech and Nano-Bionics 398 Ruoshui Road i-Lab Suzhou 125123 China

Flexible mechanosensors with a high sensitivity and fast response speed may advance the wearable and implantable applications of healthcare devices, such as real-time heart rate, pulse, and respiration monitoring. In this paper, we introduce a novel flexible electronic eardrum （EE） based on single-walled carbon nanotubes, polyethylene, and polydimethylsiloxane with micro-structured pyramid arrays. The EE device shows a high sensitivity, high signal-to-noise ratio （approximately 55 dB）, and fast response time （76.9 μs） in detecting and recording sound within a frequency domain of 20-13,000 Hz. The mechanism for sound detection is investigated and the sensitivity is determined using the micro-structure, thickness, and strain state. We also demonstrated that the device is able to distinguish human voices. This unprecedented performance of the flexible electronic eardrum has implications for many applications such as implantable acoustical bioelectronics and personal voice recognition.

关键词： electronic eardrum (EE) pressure sensor carbon nanotube voice recognition