材料科学
标度系数
拉伤
灵敏度(控制系统)
应变计
弯曲
制作
光电子学
复合材料
纳米技术
电子工程
医学
内科学
工程类
病理
替代医学
作者
Jidong Shi,Suye Lv,Liu Wang,Zhaohe Dai,Siting Yang,Lingyu Zhao,Huihui Tian,Mingde Du,Hongbian Li,Ying Fang
标识
DOI:10.1002/admi.201901223
摘要
Abstract Strain sensors with high sensitivity and large sensing range have great potential in a wide range of applications. However, in the design of strain sensors, there is usually a trade‐off between sensitivity and sensing range. Herein, a crack‐based strain sensor with engineered microstructure is facilely prepared through a biotemplating method. Under large tensile strains, randomly distributed microcavities on the strain sensor surface can effectively trap and terminate propagating cracks to prevent catastrophic fracture failure. As a result, the strain sensor shows both wide sensing range (up to 80%) and high sensitivity (gauge factor = 20 at 20% strain, 350 at 80% strain). The strain sensor enables sensitive and reliable detection of both subtle human motions, including wrist pulse and throat vibration, and large motions, such as finger bending. Moreover, a multipixel strain sensor array has been fabricated and applied for both static and dynamic strain mapping. The good sensing performance, together with its easy‐fabrication process, make the biotemplated strain sensor a promising candidate for applications in e‐skins and wearable electronics.
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