CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Weijun Jiang,Jingyuan Liu,Hongsen Zhang,Dalei Song,Jing Yu,Qi Liu,Rongrong Chen,Jiahui Zhu,Jun Wang
Wearable, flexible sensors based on hydrogel fabrication have recently gained significant attention due to their unique properties. However, developing hydrogel sensors that maintain high sensitivity and work effectively in sub-zero temperatures remains a formidable challenge. Herein, a hydrogel with surfaces featuring randomly distributed microspines is synthesized by combining sodium alginate (SA) and acrylamide (AM) as the hydrogel components. To fabricate a wearable sensor, a highly conductive MXene layer is inkjet-printed onto the surface of the hydrogel microspines. The resulting sensor exhibits a remarkable array of features, including exceptional sensitivity (15.03 kPa −1 ), a low detection limit (10 Pa), a vast operating range (0.12–70 kPa), rapid response and recovery (40/100 ms), reliable performance (over 1000 cycles), and outstanding resistance to low temperatures (-20 °C). Moreover, this hydrogel-based sensor facilitates the efficient collection of human monitoring data, such as vocal patterns, pulse, and joint movements, even when operating at −20 °C and in ice bath conditions. Importantly, the surface-based inkjet MXene hydrogels could be assembled into a deformable triboelectric nanogenerator (TENG), allowing mechanical energy harvesting. The TENG exhibited peak output voltage and current values of 5 V and 2.5 μA, respectively.
研究领域:
生物医学工程
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柔性电子
·
纳米能源
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可穿戴设备
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传感器技术
·
功能材料
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转化医学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2023
·Vol. 129
·期 10
·682
·
IF 2.7
Yin Chunmei,Li Qinghua,Lu Zhiyi,Shi Yaochen,Lin Wei
A highly sensitive pressure-sensitive sensor based on MXene was developed using the electrostatic self-assembly method, with carbide sponges as the elastic substrate and a rational design. Specifically, CTAB was used to treat the carbide triamine sponge and conduct the electrostatic self-assembly with MXene to achieve a tightly combined conductive filler and substrate. The resulting pressure sensor showed excellent performance, with a high sensitivity of 15.05 kPa −1 under a range of 0–20 kPa, a response time of 0.1 s, and high durability under 2000 loading–unloading cycles. The minimum detection limit of the sensor was as low as 0.3 Pa, demonstrating excellent monitoring performance. Additionally, finite-element simulation analysis showed that MXene@CTAB@CMF had even better sensing performance at the same stress level. Moreover, the pressure sensor exhibited good sensing performance for various physiological signals and daily work monitoring of the human body, indicating its potential application value.
研究领域:
生物医学工程
·
纳米医学
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柔性电子学
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传感技术
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
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IF 6.361
Kun Qi,Hongbo Wang,Xiaolu You,Xuejiao Tao,Mengying Li,Yuman Zhou,Yimin Zhang,Jianxin He,Weili Shao,Shizhong Cui
Highly sensitive wearable textile pressure sensors represent the key components of smart textiles and personalized electronics, with potential applications in biomedical monitoring, electronic skin, and human-machine interfacing. Here, we present a simple and low-cost strategy to fabricate highly sensitive wearable textile pressure sensors for non-invasive human motion and physiological signal monitoring and the detection of dynamic tactile stimuli. The wearable textile sensor was woven using a one-dimensional (1D) weavable core-sheath nanofiber yarn, which was obtained by coating a Ni-coated cotton yarn electrode with carbon nanotube (CNT)-embedded polyurethane (PU) nanofibers using a simple electrospinning technique . In our design, the three-dimensional elastic porous nanofiber structure of the force-sensing layer and hierarchical fiber-bundled structure of the conductive Ni-coated electrode provide the sensor with a relatively large surface area, and a sufficient surface roughness and elasticity. This leads to rapid and sharp increases in the contact area under stimuli with low external pressure. As a result, the textile pressure sensor exhibits the advantages of a high sensitivity (16.52 N −1 ), wide sensing range (0.003–5 N), and short response time (~0.03 s). Owing to these merits, our textile-based sensor can be directly attached to the skin as usual and conformally fit the shape deformations of the body’s complex flexible curved surfaces. This contributes to the reliable real-time monitoring of human movements, ranging from subtle physiological signals to vigorous movements. Moreover, a large-area textile sensing matrix is successfully fabricated for tactile mapping of spatial pressure by being worn on the surface of wrist, highlighting the tremendous potential for applications in smart textiles and wearable electronics .
研究领域:
生物医学工程
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柔性电子学
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智能纺织品
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可穿戴传感器
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人机交互
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转化医学
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2019
·Vol. 4
·期 9
·1900414
·
IF 5.395
Shuai Zhao,Rong Zhu
Flexible pressure sensors attract wide attentions in recent years for their significant applications in wearable electronics and health monitoring. It is strongly desired that a pressure sensor possesses both low detection limit and wide measuring capability, covering a broad pressure range from Pa to hundred kPa, to meet diverse demands in different applications. This paper proposes a novel flexible pressure sensor based on thermosensation, using a multilayered and graded-porosity polydimethylsiloxane/silver nanoparticle sponge as piezo-thermic transduction. The sensor exhibits a high sensitivity, a low detection limit of 4.1 Pa, and a wide measuring range up to 200 kPa, which leads to a high range-to-limit ratio of about 50 000. The pressure sensor is monolithically integrated with a temperature sensor and dissolves temperature-compensation. The unique combination of properties makes it feasible to monitor various human signals from subtle wrist pulse to finger tapping pressure and foot stepping pressure by a single device, which shows competent capabilities for multifarious applications in wearable electronics and health monitoring.
研究领域:
生物医学工程
·
传感器技术
·
可穿戴设备
·
健康监测
·
柔性电子
·
转化医学
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2019
·Vol. 4
·期 10
·1900426
·
IF 5.395
Peng Bi,Xiaowei Liu,Yang Yang,Ziyu Wang,Jing Shi,Gaomin Liu,Fangfang Kong,Benpeng Zhu,Rui Xiong
Wearable devices have become very important for collecting health information and monitoring the condition of seriously ill patients. However, most recently developed wearable devices can only monitor limited signals within a very small range of values. A novel sensor is fabricated by modifying the surface of polyimide nanowires with silver nanoparticles. These nanowire sensors can sense both pressure and temperature changes and have antimicrobial properties. The fabricated sensor can detect a wide range of pressure variation from 5 KPa to 100 KPa. A theoretical model is developed to explain the sensing mechanism of the silver-nanoparticle-modified polyimide nanowires. The experimental and theoretical results for the nanowires are in good agreement. By attaching these sensors to human joints and fingers, real-time information can be detected for human motion, such as walking or holding a hot cup of water. The excellent performance of this device shows that it has great potential for use in artificial skins for detecting temperature and human motion.
研究领域:
生物医学工程
·
纳米医学
·
柔性电子
·
智能材料
·
转化医学
·
可穿戴传感器
✓ 已验证
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2024
·Vol. 221
·期 16
·2400342
·
IF 1.9
Jian Cheng,Xin Liu,Weichang Kong,Qingzheng Lei,Zhiyu Yu,Dun Liu
The fabrication of flexible electronics has gained extensive attention due to the growing demand of flexible devices. Among various methods, laser direct writing technology has emerged as a promising approach due to its advantages of high processing accuracy and simplicity. This research focuses on the preparation of copper microelectrodes using laser-induced reduction of CuO nanoparticles (Cu NPs) on polyethylene terephthalate films. First, the influence of various parameters on the conductivity of the copper microelectrodes is investigated. Second, flexible copper microelectrodes with a minimum resistivity of 62.29 μΩ cm and an adhesion grade of 4B level are successfully fabricated. Building upon these results, a capacitive pressure sensor is developed with optimal sensitivity of 3.99 Pa −1 , good hysteresis of 3.99%, and response and recovery times of 1.2 and 1.3 s, respectively. Repeatability tests confirm the sensor's stability and fatigue resistance. This research provides valuable insights for the production of flexible sensors.
研究领域:
生物医学工程
·
柔性电子学
·
传感器技术
·
纳米材料
·
微纳加工
·
可穿戴设备
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 24
·2207362
·
IF 13.3
Yaqiang Ji,Yuan Zhang,Jiaqi Zhu,Pai Geng,Jonathan E. Halpert,Liang Guo
Flexible pressure sensors play an indispensable role in flexible electronics. Microstructures on flexible electrodes have been proven to be effective in improving the sensitivity of pressure sensors. However, it remains a challenge to develop such microstructured flexible electrodes in a convenient way. Inspired by splashed particles from laser processing, herein, a method for customizing microstructured flexible electrodes by femtosecond laser-activated metal deposition is proposed. It takes advantage of the catalyzing particles scattered during femtosecond laser ablation and is particularly suitable for moldless, maskless, and low-cost fabrication of microstructured metal layers on polydimethylsiloxane (PDMS). Robust bonding at the PDMS/Cu interface is evidenced by the scotch tape test and the duration test over 10 000 bending cycles. Benefiting from the firm interface, the developed flexible capacitive pressure sensor with microstructured electrodes presents several conspicuous features, including a sensitivity (0.22 kPa −1 ) 73 times higher than the one using flat Cu electrodes, ultralow detection limit (<1 Pa), rapid response/recovery time (4.2/5.3 ms), and excellent stability. Moreover, the proposed method, inheriting the merits of laser direct writing, is capable of fabricating a pressure sensor array in a maskless manner for spatial pressure mapping.
研究领域:
生物医学工程
·
柔性电子学
·
微纳加工
·
传感器技术
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）