检索结果-南通市图书馆

Bio-inspired flexible Airflow sensor with Self-bended 3D Hair-like Configurations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2022年第1期19卷 73-82页

作者： Dawei Shen Yonggang Jiang Zhiqiang Ma Peng Zhao Zheng Gong Zihao Dong Deyuan Zhang School of Mechanical Engineering and Automation Beihang UniversityBeijing100191China International Research Institute of Multidisciplinary Science Beihang UniversityBeijing100191China

This paper presents a novel flexible airflow sensor based on four curved microcantilevers arranged in a cross-form configuration.A self-bending method based on MEMS technology has been used to fabricate the curved microcantilevers structure,and this method can transfer a 2D plane structure into a 3D structure with good consistency in the morphology.The curved microcantilever consists of a polyimide(PI)top layer,silicon(Si)bottom layer,and platinum(Pt)piezoresistor at the root of the cantilever.The difference in the in-plane residual stress between the PI and Si layers bent the microcantilever upward.The curved-up microcantilever transfers the fluidic momentum that acts on it to drag force,which deflects the curved-up microcantilever and changes the resistance of the piezoresistor.To realize temperature compensation and decrease the noise,a reference resistor and an ambient temperature detector were integrated for the Wheatstone half-bridge measurement and temperature monitoring,respectively.The cross-form configuration of the curved-up cantilevers has high sensitivity advantages and possesses direction-sensing ability.Experimental results show that the sensitivity of the sensors increased as a function of the airflow velocity,and the sensors exhibited a maximum resolution of 4 mm⋅s^(−1) and a maximum sensitivity of 60.35 mV⋅(ms^(−1))^(−1) when the airflow velocity was larger than 38.5 m⋅s^(−1).

关键词： Airflow sensor Piezoresistive Self-bended cantilevers Flexible sensor

Patternable production of SrTiO_(3) nanoparticles using 1-W laser directly on flexible humidity sensor platform based on ITO/SrTiO_(3)/CNT

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第12期71卷 186-194页

作者： Le Thai Duy Ji-Ye Baek Ye-Ji Mun Hyungtak Seo Department of Materials Science&Engineering Ajou UniversitySuwon16499South Korea Department of Energy Systems Research Ajou UniversitySuwon16499South Korea

Perovskite oxides like S rTiO_(3) at the nanoscale are of interest for eme rging applications,including high-k dielectrics and sensors.However,their synthesis requires long calcination at the elevated temperature,which is a barrier of their application to flexible electronics.Here,an effective laser-assisted sol-gel method to patternably produce S rTiO_(3) na noparticles(-100 nm)in selective areas on polyimide substrates(coated with ITO)is introduced.Importantly,the violet-laser power is just 1 W but sufficient to crystallize the material in a short period(a few seconds).Furthermore,developing a flexible device platform using carbon nanotubes(CNT)and SrTiO_(3) nanoparticles for detection of humidity changes at room temperature is proposed.The sensor platform has both capacitive and resistive sensing abilities.The resistive mode with a lower power usage(about 0.2μW)is suitable for long monitoring of humidity in the range of2%RH and above.The capacitive mode with higher sensitivity,faster response/recovery time(1-3 min),and lower detection limit(0.5%RH)can be used for calibration purposes.The performance of the Flexible sensor is still maintained after 5000 bending cycles at 1.5-cm radius.Altogether,our synthesis method and the Flexible sensor show chances for mass-producing perovskite oxides at low cost for wearable electronics.

关键词： SrTiO_(3) Nanoparticles Laser annealing Patternable Flexible sensor CNT

An intraoperative lumbar neurological force monitoring system with high-density flexible pressure sensor array

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2020年第4期26卷 435-441页

作者：张琪 Zhang Xu Li Caili Liu Jianchao Liu Ming Yuan Fang Chen Hongda State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China Academy of Advanced Semiconductors and Intelligence Technologies Haining 314400P.R.China

In the surgery of lumbar disc herniation(LDH),the nerve root retractor is used to pull the nerve root to prevent damage.The traditional medical nerve root retractor cannot quantify the force on the nerve root.In order to improve the nerve root retractor,this paper proposes an intraoperative lumbar neurological force monitoring system.The core module of this system is the improved nerve root retractor equipped with the high density flexible pressure sensor array.The high density microneedle array and multiple pressure detection units are used in the pressure sensor to realise sensitive pressure monitoring in a narrow surgical operation area.The sensing area is 4 mm×17 mm,including 6 detection units.The sensitivity of sensor is 67.30%/N in the range of 0-5 N.This system is used for in vitro animal experiments,which can continuously detect pressure.

关键词： nerve root retractor Flexible sensor force monitoring lumbar disc herniation(LDH)surgery

flexible temperature sensor with high sensitivity ranging from liquid nitrogen temperature to 1200℃

在线全文

学校读者我要写书评

暂无评论

International Journal of Extreme Manufacturing 2023年第1期5卷 355-366页

作者： Zhaojun Liu Bian Tian Zhuangde Jiang Shuimin Li Jiaming Lei Zhongkai Zhang Jiangjiang Liu Peng Shi Qijing Lin State Key Laboratory for Mechanical Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China Department of Electrical&Computer Engineering National University of SingaporeSingapore 117576Singapore

flexible temperature sensors have been extensively investigated due to their prospect of wide application in various flexible electronic products.However,most of the current flexible temperature sensors only work well in a narrow temperature range,with their application at high or low temperatures still being a big challenge.This work proposes a flexible thermocouple temperature sensor based on aerogel blanket substrate,the temperature-sensitive layer of which uses the screen-printing technology to prepare indium oxide and indium tin oxide.It has good temperature sensitivity,with the test sensitivity reaching 226.7μV℃^(−1).Most importantly,it can work in a wide temperature range,from extremely low temperatures down to liquid nitrogen temperature to high temperatures up to 1200℃,which is difficult to be achieved by other existing flexible temperature sensors.This temperature sensor has huge application potential in biomedicine,aerospace and other fields.

关键词： Flexible sensor temperature thermocouple

flexible piezoelectric PVDF nanofiber film sensor by blow spinning

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2023年第3期66卷 863-868页

作者： HE Wei DAI ZhiJun ZOU KangKang LI XueYing HAO SongHua WANG HaoLun School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China

Flexible sensors can be widely applied in the area of lightweight,wearable and intelligent electronic devices.In aerospace,for example,Flexible sensors are suitable for measuring pressure in complex aircraft structures.In recent years,Flexible sensors have been well developed;however,most of them lack circuit parts,meaning that the sensors have to be connected to an external electrical source.Additionally,the current traditional design limits their flexibility.Thus,this article proposes a self-powered Flexible sensor based on PVDF nanofiber film,which is created through an efficient blow spinning method.The piezoelectric PVDF nanofiber films were prepared,and the flexible pressure sensor was assembled.The PVDF nanofiber film sensor showed good sensitivity and stability,and it can be applied for the detection of human physiological signals.

关键词： PVDF nanofiber network blow spinning Flexible sensor

A flexible and high temperature tolerant strain sensor of La0.7Sr0.3MnO3/Mica

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第9期44卷 42-47页

作者： Min Guo Cheng Yang Dong Gao Qiang Li Aihua Zhang Jiajun Feng Hui Yang Ruiqiang Tao Zhen Fan Min Zeng Guofu Zhou Xubing Lu J-MLiu Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Optical Information Materials and Institute of Electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China National Center for International Research on Green Optoelectronics South China Normal UniversityGuangzhou 510006China Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Flexible sensors have been widely investigated due to their broad application prospects in various flexible electronics.However,most of the presently studied Flexible sensors are only suitable for working at room temperature,and their applications at high or low temperatures are still a big challenge.In this work,we present a multimodal Flexible sensor based on functional oxide La0.7Sr0.3MnO3(LSMO)thin film deposited on mica substrate.As a strain sensor,it shows excellent sensitivity to mechanical bending and high bending durability(up to 3600 cycles).Moreover,the LSMO/Mica sensor also shows a sensitive response to the magnetic field,implying its multimodal sensing ability.Most importantly,it can work in a wide temperature range from extreme low temperature down to 20K to high temperature up to 773 K.The Flexible sensor based on the flexible LSMO/mica hetero-structure shows great potential applications for flexible electronics using at extreme temperature environment in the future.

关键词： Flexible sensor Mica La0.7Sr0.3MnO3 High temperature Multimodal sensing

flexible micro flow sensor for micro aerial vehicles

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2017年第4期12卷 539-545页

作者： Rong ZHU Ruiyi QUE Peng LIU State Key Laboratory of Precision Measurement Technology andInstruments Department of Precision Instrument Tsinghua UniversityBeijing 100084 China

This article summarizes our studies on micro flow sensors fabricated on a flexible polyimide circuit board by a low-cost hybrid process of thin-film deposition and circuit printing. The micro flow sensor has merits of flexibility, structural simplicity, easy integrability with circuits, and good sensing performance. The sensor, which adheres to an object surface, can detect the surface flow around the object. In our study, we install the fabricated micro flow sensors on micro aerial vehicles （MAVs） to detect the surface flow variation around the aircraft wing and deduce the aerodynamic parameters of the MAVs in flight. Wind tunnel experiments using the sensors integrated with the MAVs are also conducted.

关键词： micro flow sensor Flexible sensor surfaceflow sensing aerodynamic parameter micro aerial vehicle（MAV）

MXene-Based Elastomer Mimetic Stretchablesensors: Design, Properties, and Applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第7期16卷 295-342页

作者： Poushali Das Parham Khoshbakht Marvi Sayan Ganguly Xiaowu(Shirley)Tang Bo Wang Seshasai Srinivasan Amin Reza Rajabzadeh Andreas Rosenkranz School of Biomedical Engineering McMaster University1280 Main Street WestHamiltonON L8S 4L8Canada Department of Chemistry and Waterloo Institute for Nanotechnology(WIN) University of Waterloo200 University Ave WestWaterlooONCanada Centre for Eye and Vision Research(CEVR) 17W Hong Kong Science ParkShatinHong KongPeople’s Republic of China Chair of Functional Materials Department of Materials Science and EngineeringSaarland UniversitySaarbruckenGermany W Booth School of Engineering Practice and Technology McMaster University1280 Main Street WestHamiltonON L8S 4L7Canada Department for Chemical Engineering Biotechnology and MaterialsUniversity of ChileSantiagoChile

Flexible sensors based on MXene-polymer composites are highly prospective for next-generation wearable electronics used in human-machine interfaces.One of the motivating factors behind the progress of Flexible sensors is the steady arrival of new conductive materials.MXenes,a new family of 2D nanomaterials,have been draw-ing attention since the last decade due to their high electronic conduc-tivity,processability,mechanical robustness and chemical tunability.In this review,we encompass the fabrication of MXene-based polymeric nanocomposites,their structure-property relationship,and applications in the Flexible sensor domain.Moreover,our discussion is not only lim-ited to sensor design,their mechanism,and various modes of sensing platform,but also their future perspective and market throughout the world.With our article,we intend to fortify the bond between flexible matrices and MXenes thus promoting the swift advancement of flexible MXene-sensors for wearable technologies.

关键词： Flexible sensor 2D nanomaterials MXene Wearable and conductive Applications

Thermal-sensitive ionogel with NIR-light controlled adhesion for ultrasoft strain sensor

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第4期16卷 5464-5472页

作者： Bing Lei Longxue Cao Xinyu Qu Yunlong Liu Jinjun Shao Qian Wang Shuhong Li Wenjun Wang Xiaochen Dong School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059China Key Laboratory of flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)Nanjing 211816China School of Chemistry&Materials Science Jiangsu Normal UniversityXuzhou 221116China

With the widespread prevailing of flexible electronics in human-machine interfaces,health monitor,and human motion detection,ultrasoft Flexible sensors are urgently desired with critical demands in conformality.Herein,a temperature-sensitive ionogel with near-infrared(NIR)-light controlled adhesion is prepared by electrostatic interaction of poly(diallyl dimethylammonium chloride)(PDDA)and acrylic acid,as well as the incorporation of the conductive polydopamine modified polypyrrole nanoparticles(PPy-PDA NPs).The PPy-PDA NPs could weaken the tough interaction between polymer chains and depress the Young’s modulus of the ionogel,thus promoting the ionogel ultrasoft(34 kPa)and highly stretchable(1,013%)performance to tensile deformations.In addition,the high photothermal conversion capacity of PPy-PDA NPs ensured the ionogel excellent NIR-light controlled adhesion and temperature sensitivity,which facilitated the ionogel on-demand removal and promised a reliable thermal sensor.Moreover,the resulted ultrasoft Flexible sensor exhibited high sensitivity and stability to both strain and pressure in a broad range of deformations,enabling a precise monitoring on various human motions and physiological activities.The temperature-sensitive,ultrasoft,and controlled adhesive capabilities prompted great potential of the flexible ionogel in medical diagnosis and wearable electronics.

关键词： ultrasoft temperature-sensitive controllable adhesion photothermal effect Flexible sensor