Facile fabrication of stretchable microgroove-crack-based strain sensor with high sensitivity and low detection limit

• Published in: Composite structures 2023-08, Vol.317, p.117061, Article 117061
• Main Authors: Zhang, Xinyu, Gao, Miao, Qiu, Mingfu, Ning, Chuan, Gao, Chaojun, Zheng, Guoqiang, Zhao, Yanjun, Dai, Kun, Liu, Chuntai, Shen, Changyu
• Format: Article
• Language: English
• Subjects: Electrical properties; Flexible strain sensor; Polymer-matrix composites (PMCs)
• ISSN: 0263-8223; 1879-1085
• DOI: 10.1016/j.compstruct.2023.117061

•PTFE template with micro-cavity was prepared by micromilling.•As-prepared PTFE templates have the advantages of easy demoulding and reusability.•A facile and low-cost method to fabricate microgroove-crack-based strain sensor.•Such strain sensor exhibits high sensitivity and low detection limit.•Detect body motion underwater and sound vibration with different frequencies. Strain sensor is a crucial component of high-performance wearable electronic devices. Crack-based sensor has attracted much attention due to its high sensitivity that allow an extensive application for wearable electronic devices. However, facile, efficient and cost-effective fabricating crack-based sensors is still a challenge. Herein, a facile, highly efficient, and low-cost approach was proposed to fabricate stretchable microgroove-crack-based strain sensor whose highest sensitivity is 27818.5 and low detection limit is 0.01%. Moreover, it can be pasted on human body to detect motion both in air and underwater conditions. Furthermore, it can recognize the recorded vibration spectrum of different musical scores. This study offers a facile and efficient approach for fabricating stretchable microgroove-crack-based strain sensor, showing tremendous potential in future wearable electronic devices production.