Flexible strain sensors are promising candidates for intelligent wearable devices.Among previous studies,although crack-based sensors have attracted a lot of attention due to their ultrahigh sensitivity,large strain usually causes fractures in the conductive paths.Because of the unstable crack structure,the tradeoff between sensitivity and workable strain range is still a challenge.As carbon nanotubes(CNTs)and silver nanowires(AgNWs)can form a strong interface with the thermoplastic substrate and strengthen the conductive network by capillary force during water evaporation,CNTs and AgNWs were deposited on electrospun TPU fiber mats via vacuum-assisted filtration in this work.The prestretching treatment constructed a microcrack structure that endowed the sensor with the combined characteristics of a wide working range(0~171%strain),ultrahigh sensitivity(a gauge factor of 691 within 0~102%strain,~2×104 within 102~135%strain,and>11×104 within 135~171%strain),a fast response time(~65 ms),small hysteresis,and superior durability(>2000 cycles).Subsequently,the sensing mechanism of the sensor was studied.Distributed microcrack propagation based on the"island-bridge"structure was explained in detail,and its influence on the strain-sensing behavior of the sensor was analyzed.Finally,the sensor was assembled to monitor various vibration signals and human motions,demonstrating its potential applications in the fields of electronic skin and human health monitoring.
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机译:Detection Range Enhancement of Stretchable Ultrasensitive Crack-Based Strain Sensor with Ordered Ag Nanowire Micromeshes for Human Epidermis Monitoring
机译:Detection Range Enhancement of Stretchable Ultrasensitive Crack-Based Strain Sensor with Ordered Ag Nanowire Micromeshes for Human Epidermis Monitoring
机译:Studies from University of Maryland Yield New Information about Robotics (Egain-silicone-based Highly Stretchable and Flexible Strain Sensor for Real-time Two Joint Robotic Motion Monitoring)
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