材料科学
聚烯烃
纳米纤维
弹性体
纳米线
纳米技术
膜
压力传感器
静电纺丝
表面改性
可穿戴计算机
复合材料
聚合物
化学工程
图层(电子)
物理
嵌入式系统
工程类
热力学
生物
遗传学
计算机科学
作者
Weibing Zhong,Cui Liu,Qiongzhen Liu,Longhai Piao,Haiqing Jiang,Wen Wang,Ke Liu,Mufang Li,Gang Sun,Dong Wang
标识
DOI:10.1021/acsami.8b12363
摘要
Wearable pressure sensors with ultrahigh sensitivity and flexibility have garnered tremendous attention because of their abilities to mimic the human somatosensory system and perceive surrounding pressure distribution. Herein, an ultrasensitive pressure sensor was fabricated with surface-patterned nanofibrous membranes (SPNMs) via a facile replica method from available plain-weaved nylon textiles. The SPNMs were composed of internal three-dimensional interpenetrating polyolefin elastomer nanofibers and silver nanowires (Ag NWs). The effects of the geometry of surface patterns and the density of the Ag NW network on the sensing performance of the assembled pressure sensor were systematically investigated. The results indicated that clavate groove-shaped surface patterns improved the sensitivity and a larger groove spacing contributed to higher sensitivities, whereas denser Ag NWs would reduce the sensing performance. The optimal pressure sensor assembled with SPNMs-45 and a Ag NW fraction of 3.8% showed high sensitivity (19.4 kPa-1) below the pressure of 2.76 kPa, a low detection limit (<1.6 Pa), fast response (30 and 42 ms), as well as excellent durability. These outstanding performances demonstrated its promising potential for wearable electronic applications, like detecting the spatial pressure distribution and monitoring human muscle motions.
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