IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 23
·39651-39658
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IF 4.3
Xuanmo Zhao,Kedi Chen,Weichen Huang,Fanchen Luo,Xi Wang,Yafei Qin
The applications of flexible sensors that can mimic biological skin have enormous potential in areas, such as artificial intelligence and healthcare detection. The existing rigid/flexible pressure sensors mainly rely on resistive or capacitive sensors, necessitating a continuous external power supply. The current self-powered sensors, such as triboelectric and piezoelectric, struggle to continuously measure static forces. Some piezoelectric sensors can detect static forces but require additional power or external resistors for static measurements. Developing a flexible sensor that can monitor various external stimuli like skin and does not require power can address these shortcomings. This article proposes a single-mode flexible pressure sensor based on the principle of air battery. By introducing different structures to the cathode and solid electrolyte of the battery, the sensor’s linearity and pressure detection range can be significantly improved. The sensor’s linearity exceeds 99% under pressures ranging from 0 to 45 kPa, with a response time of less than 50 ms. Besides, self-powered sensor can work continuously for over eight days. Testing shows that the sensor can mimic the functions of rapid adaptive (RA), slow adaptive (SA) cutaneous mechanoreceptors, and Krause corpuscles to detect mechanical stimuli and temperature. This work introduces novel strategy to enhance the performance of battery powered self-powered sensors, with anticipated applications in areas, such as medical health detection and artificial intelligence.
研究领域:
生物医学工程
·
材料科学
·
人工智能
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
·
2019
·Vol. 19
·期 21
·4607
·
IF 3.031
Yaqin He,Mengyao Zhang,Nan Zhang,Danrong Zhu,Chun Huang,Ling Kang,Xiaofeng Zhou,Menghan Hu,Jian Zhang
Humidity sensors are indispensable for various electronic systems and instrumentations. To develop a new humidity sensing mechanism is the key for the next generation of sensor technology. In this work, a novel flexible paper-based current humidity sensor is proposed. The developed alternating current electroluminescent devices (ACEL) consist of the electroless plating Ni on filter paper and silver nanowires (AgNWs) as the bottom and upper electrodes, and ZnS:Cu as the phosphor layer, respectively. The proposed humidity sensor is based on ACEL with the paper substrate and the ZnS:Cu phosphor layer as the humidity sensing element. The moisture effect on the optical properties of ACELs has been studied firstly. Then, the processing parameters of the paper-based ACELs such as electroless plated bottom electrode and spin-coated phosphor layer as a function of the humidity-sensitive characteristics are investigated. The sensing mechanism of the proposed sensor has been elucidated based on theQ~Vanalysis. The sensor exhibits an excellent linearity (R2=0.99965) within the humidity range from 20% to 90% relative humidity (RH) and shows excellent flexibility. We also demonstrate its potential application in postharvest preservation where the EL light is used for preservation and the humidity can be monitored simultaneously through the current.Keywords:paper-based ACEL;capacitive humidity sensor;ZnS:Cu;flexible;high–linearity
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 32
·12389-12396
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IF 5.7
Yunfei Wang,Hao Sun,Yang Zhou,Ruifeng Wu,Yafei Liu,Lili Zhi,Aimin Chang,Bo Zhang
LaCrO3-based ceramics are crucial for fabricating low temperature thermistors due to their unique physical and chemical properties. However, challenges such as nonlinear electrical behaviors (temperature dependence of the resistivity deviates from the Arrhenius equation), and insufficient stability limit their application in precise temperature sensing and control. Here, we propose a high entropy strategy to design novel thermistor ceramics (La0.2Nd0.2Sm0.2Gd0.2Y0.2)CrO3−δ, which results in a widening band gap and increasing lattice distortion. These modifications lead to a significant rise in resistivity and a good linear temperature dependence of the resistivity, along with a reduced thermal hysteresis effect. The results reveal that high entropy modification crucially contributes to the improved thermal and electrical performance of LaCrO3 ceramics due to pronounced lattice distortion and band gap expansion. This study underscores the significance of entropy induced microstructural modifications, thus establishing a novel paradigm for tailoring the electronic properties of LaCrO3-based ceramics and expanding the horizons of material science in thermal sensing technologies.
研究领域:
材料科学
·
热敏电阻技术
·
电子工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 1
·2309054
·
IF 19
Guangyue Shen,Chenyu Zhuge,Jiandong Jiang,Yujun Fu,Yiming Zheng,Zhaoyang Qin,Qi Wang,Deyan He
Neuromorphic computing inspired by memristors has gained considerable attention due to its low power and easy integration. However, state-of-the-art two-terminal resistive switching memristors based on conductive filament formation suffer from high variability and poor controllability. As a three-terminal device operated through electrochemistry and dynamic insertion/extraction of ions, the electrochemical ion synapse demonstrates deterministic control of electron conductivity based on ion doping. But, integrating the electrochemical ion synapse into crossbar arrays will pose higher challenges and lower integration density. Herein, inspired by first-principles calculations, a two-terminal bidirectional plasticity electrochemical artificial synapse with integrated lithium polymer electrolyte and polycrystalline tungsten oxide layer is reported. The linearity and stability of the device weight update are greatly improved by adjusting the defect concentration of the polycrystalline WO 3 layer. Even after 16 000 write-read events in the air, its performance remained almost unchanged. Moreover, it has an over-limit protection mechanism under one-way stimulation that exceeds the normal range. Based on this excellent stability, the authors designed and successfully simulated the “muscle memory” that the programmatical organization of the nervous system leads to proficiency in specific actions.
研究领域:
神经形态计算
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材料科学
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电子工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xu Ma,Lijiu Cao,Nian Li,Yunpeng Gong,Yue Hu,Zongxing Yu,Tao Jin,Yufang Chen
Moisture-sensitive materials need to meet the technical requirements of low power consumption, high precision and integratability, which are crucial for the development of new advanced moisture-sensitive devices and humidity sensor technologies. In this work, polyacrylates (PAC) were modified with nano halloysite powders (HNTs) to prepare resistive halloysite/polyacrylate composite moisture-sensitive films (PAC/HNTs) with excellent performances. Compared with the humidity-sensitive performance of PAC, the response time was reduced from 5 s to 0.9 s in the humidity range of 11–96% RH. Particularly, in the 30–96% RH humidity range, the average power consumption of the device was 88.41 μW and exhibited excellent linearity (R = −0.99), low wet hysteresis (5.04% RH), and excellent thermal and long-term stability. Thus, PAC/HNTs hold significant potential in the development of new humidity-sensitive devices and sensors with fast response, low power consumption, high accuracy and integratability.
研究领域:
材料科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haoze Yuan,Peixing Li,Xinyu Wang,Cheng Yu,Xin Wang,Jutao Sun
An increasing attention has been paid to crack-based strain sensors due to their ultrahigh sensitivity. However, two main challenges with such sensors still need to be addressed. Firstly, most crack-based sensors face a trade-off between sensitivity and detection range. Secondly, the problem of low linearity occurs widely among crack-based sensors. This paper presents a simple and efficient method to obtain a multidimensional (1D/2D) crack-based stretchable sensor with dual conductive (electronic/ ionic) network. The process involves creating a hybrid conductive film consisting of Ti 3 C 2 T x MXene nanosheets (MXene) and carbon nanotubes (CNTs) via vacuum-assisted filtration, and developing a flexible substrate with ionic conductivity through convenient UV-initiated curing. The prepared sensor exhibited a broad range of workable strain (0–389 %), high sensitivity (GF = 216.8), rapid response/ recovery (165 ms/ 86 ms) and exceptional durability. Most notably, this strain sensor demonstrates strong linearity (R 2 = 0.983) with the synergistic effect of the dual conductive network and cracked hybrid film, an advantage over other crack-based sensors. Therefore, our novel dual-conductive strain sensors, with its superior comprehensive performance, can effectively monitor various large and subtle human movements, including joint bending, pulse, and speech recognition. It is credible that this highly stretchable sensor possesses tremendous potential in human motion monitoring, personal healthcare monitoring, and human–computer interaction.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Zhenjin Xu,Wei Xiao,Keqi Deng,Yang Zhang,Tingting Shen,Xin Liu,Zhengmao Ding,Qiulin Tan,Dezhi Wu
Growing imperative for intelligent transformation of electro-ionic actuators in soft robotics has necessitated self-perception for accurately mapping their nonlinear dynamic responses. Despite the promise of integrating crack-based strain sensors for such a purpose, significant challenges remain in controlling crack propagation to prevent the induction of through-cracks, resulting in lower sensitivity, linearity, and poor detection limits. Herein, we propose a hierarchical crack-based synergistic enhancement structure by incorporating conductive poly(pyrrole)-coated polystyrene nanospheres and Ti3C2Tx MXene to induce cross-long sensing cracks via point-to-plane contacts, along with silver nanowires for positively engineering networked microcracks for linearity tuning. The prepared microstrain sensor achieves high linearity (GF = 152.4, R2 = 0.99) regulation within ∼6% strain range, ultralow detection limit of 0.02%, and ultrafast response/recovery time of 31 ms/32 ms under 0.2%. Notably, state-of-the-art sensing performance by detecting minimal strain changes down to one millionth, i.e., ∼1 microstrain, has been demonstrated by voiceprint recognition, while maintaining superior dynamic measurement capability and long-term stability for mechanical vibrations up to 100 Hz with a response time of 5 ms. Moreover, the introduction of an adhesive and cross-linking layer facilitates robust bonding between the actuator and sensing structure, enabling real-time tracking of the actuation strain without structural interference by a resistance change resolution of 0.01%, providing significant insights for empowering soft robotics with integrated perception and intelligence.
研究领域:
材料科学
·
电子工程
·
机器人学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Chenkai Cui,Yafei Qin,Yu Zeng,Xinyu Lu,Erjiong Wei,Jiegao Xie
Flexible pressure sensors have gained increasing acceptance in recent decades due to their stability, low power consumption , and portability. However, compared to traditional sensors, the linearity of flexible sensors still needs improvement. In this study, we designed and prepared a double-layer micro-structured flexible capacitive pressure sensor with a simple structure, low cost, excellent linearity and high sensitivity. The chemical raw materials used in our experiments are inexpensive, and the overall preparation method is simple. The sensor exhibits excellent linearity (0.993, <10 kPa; 0.978, 10～130 kPa) and combines high sensitivity (0.399 kPa −1 , <10 kPa) with a wide detection range (0～130 kPa). The sensor can accurately and stably detect certain sound signals and throat movements. We designed and prepared a sensor array to monitor human sitting posture by identifying pressure distribution, thus avoiding irreversible damage caused by poor posture. This demonstrates the potential of the sensor in health monitoring.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 5
·1-12
·
IF 2.8
Xing Xue,Cao Weiwei,Wu Zhaoxin,Bai Xiaohong,Gao Jiarui,Liang Xiaozhen,Wang Bo,Wang Chao,Xiang Junjie,Shi Dalian,Lv Linwei,Bai Yonglin
In this study, we investigated the microstructural and luminescence characteristics of high-linearity ZnS:Cu 2+ ,Cl − phosphor. Through conducting the method of high-temperature solid state reaction, we prepared the ZnS phosphors characterizing with two different doping concentrations of Cu 2+ ions. The prepared two kinds of ZnS phosphors exhibit two coexisting forms of cubic phase and hexagonal phase, to which the concentration of Cu 2+ imposes no influence on the microstructure of the phosphor. The average particle size is 2.68 ± 0.5 μm and the emission wavelength locating at approximate 460 nm attribute to the zinc vacancy. As the concentration of the Cu 2+ ions increases, the energy bandgap, the fluorescence lifetime and the luminescence intensity decrease, causing noticeable concentration quenching. In addition, the linear correlation between the emission intensity and the current of the prepared phosphors is stronger than that of commercial ones. The prepared ZnS:Cu 2+ ,Cl − phosphor with high linearity and short fluorescence lifetime has great potential to be applied in practical applications in the field of high-energy physics and astrophysical exploration.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Ange Nsilani Kouediatouka,Fagla Jules Mawignon,Sen Jiang,Zhaozhe Meng,Jiawei Wang,Wentao Xia,Jiang Su,Guangneng Dong
Flexible sensors using crack-sensitive structures have garnered significant interest due to their exceptional sensitivity stemming from crack disconnection and reconnection mechanisms. However, studies on the sensor’s crack size is imperative, as cracks are typically regarded as defective or harmful in real-life applications. In this study, a new multi-layer configuration (PDMS/Ecoflex)/CNT/PET/(PDMS/Ecoflex) is employed to fabricate piezoresistive pressure sensors with reduced crack size labelled crack free, demonstrating extensive linearity and exceptional sensor responsiveness. The crack size on the conductive layer was significantly reduced using Cetyl Trimethyl Ammonium Bromide (CTAB) cationic surfactant . PDMS/Ecoflex (PE) blend matrix was shown to have an outstanding mechanical and tribological properties compared to PDMS and Ecoflex alone achieving flexibility of up to 500 %, decreasing friction by 56 %, and enhancing wear resistance. The crack-free sensors exhibited a linearity of 0.99, high sensitivity (GF = 132), and low response time (19 ms). Furthermore, crack-free pressure sensors exhibit distinct characteristics such as low detection limits, rapid response/recovery, negligible hysteresis, excellent dynamic response (over 1000 cycles), and exceptional long-term durability. the cracked-free sensor was compared to a standard crack-based sensor to analyze the crack appearance and mechanism on the overall performance and application including health monitoring and various body movement detection.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Ying Zhang,Jie Xiong,Chao Chen,Qizheng Li,Jingjing Liu,Zhicheng Zhang
The novel humidity sensor , fabricated from inorganic electrolyte doped porous metal-organic framework composite (denoted as LiCl@UiO-66-NH 2 ), is reported in the present work. The humidity sensing properties of LiCl@UiO-66-NH 2 composites have been investigated. The much higher comprehensive sensing properties of composites are obtained in LiCl@UiO-66-NH 2 with 12.5 wt% LiCl. It shows the excellent linearity (R 2 = 0.994) in a broad relative humidity (RH) range. The impedance modulus of LiCl@UiO-66-NH 2 (12.5 wt%) decreases nearly four orders of magnitude from 33% RH to 95% RH at 100 Hz. Besides, the LiCl@UiO-66-NH 2 (12.5 wt%) humidity sensor exhibits fast response (6s) and recovery (18s) speed and excellent long-term stability. The sensing mechanism was discussed through the investigation of complex impedance curves. These results suggest that LiCl@UiO-66-NH 2 have the potential application in humidity sensing. Our work offers a promising strategy for the fabrication of high performance humidity sensors.
研究领域:
材料科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2024
·Vol. 11
·期 2
·026302
·
IF 1.8
Liang Dong,Chen Li,Youjun Zhou,Mengxi Zhao,Longgang Song,Peiying Han,Heng Zhang
As the main core component of wearable devices, flexible strain sensors have broad application prospects in health monitoring, motion monitoring, human-machine interface, rehabilitation, entertainment technology and other fields. In this paper, a rectangular sandwich resistive pressure sensor is constructed with porous conductive sponge, and its working mechanism is analyzed. The linearity of the sensor is improved and the stress range is increased by gel modification. Through experimental tests, it can withstand more than 80% compressive strain, and shows a sensitivity of 0.398 kPa−1 in the range of 6 ∼ 11 kPa; the maximum range is close to 40 kPa, and the minimum detection limit is 20 Pa; under constant loading/releasing speed, the response/recovery time is about 133/150 ms; it also shows good linearity and stability. With the help of a single sensor entity, Morse code can be sent, and some human activity signals can be measured, such as speech recognition, weighing measurement, limb movement; and 8 sensors create an interesting smart insole for gait recognition. The results show that piezoresistive sensors with porous composite materials have broad application prospects in motion monitoring and human-computer interaction.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
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