文献类型：期刊文献

英文题名：Acid-Interface Engineering of Carbon Nanotube/Elastomers with Enhanced Sensitivity for Stretchable Strain Sensors

作者：Chen, Sijia[1];Wu, Rongyao[1];Li, Pei[1];Li, Qi[1];Gao, Yang[1];Qan, Bo[1];Xuan, Fuzhen[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2018

卷号：10

期号：43

起止页码：37760

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20184305988791);WOS:【SCI-EXPANDED(收录号:WOS:000449239600129)】；

基金：This project is supported by National Key Research and Development Program of China (no. 2018YFB1105400), National Natural Science Foundation of China (grant no. 51705154 and 61804054), Shanghai Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Shanghai Rising-Star Program (A type) (grant no. 18QA1401300), and Shanghai Sailing Program 17YF1403300.

语种：英文

外文关键词：stretchable strain sensor; acid-interface engineering; surface cracks; human motion detection; electronic skin

摘要：Stretchable strain sensors with high sensitivity or gauge factor (GF), large stretchability, and long-term durability are highly demanded in human motion detection, artificial intelligence, and electronic skins. Nevertheless, to develop high-sensitive sensors without sacrificing the stretchability cannot be realized using simple device configurations. In this work, an acid-interface engineering (ME) method was proposed to develop a stretchable strain sensor with high GF and large stretchability. The ME generates a layer of SiOx at the interface between the carbon nanotube (CNT) film aid Ecoflex, playing a key role in enhancing the sensor's GF. Compared to devices without AIE (GF = 2.4), the ones with AIE are significantly improved. At an AIE time of 10 min, the GF up to 1665.9 is achieved without sacrificing the stretchability (>100%). The AIE-generated cracks are found to modulate the electrical behaviors and enhance the GFs of sensors with ME through the crack-induced rapid reduction in the electrical conduction pathway, which is manipulated by the CNTs bridging over the cracks. The device with ME proves its high mechanical durability through a cycling test (>10 000 cycles) at a high strain up to similar to 80%, further paving its practical applications in various human motion detections.