Highly Compressible and Sensitive Pressure Sensor under Large Strain Based on 3D Porous Reduced Graphene Oxide Fiber Fabrics in Wide Compression Strains

• DOI: 10.1021/acsami.9b11596
• Publication Date: 2019-08-29T16:54:43Z
• Authors: Xiaoping Jiang; Zongling Ren; Yafei Fu; Yafeng Liu; Rui Zou; Guipeng Ji; Huiming Ning; Yuanqing Li; Jie Wen; H. Jerry Qi; Chaohe Xu; Shaoyun Fu; Jianhui Qiu; Ning Hu
• Keywords: Strain (injury)

The development of highly sensitive wearable and foldable pressure sensors is one the central topics in artificial intelligence, human motion monitoring, health care monitors. However, current with high sensitivity good durability low, medium, applied strains are rather limited. Herein, a flexible sensor based on hierarchical three-dimensional porous reduced graphene oxide (rGO) fiber fabrics as key sensing element presented. internal conductive structural network formed by rGO fibers which mutually contacted interfused or noninterfused fiber-to-fiber interfaces. Thanks to unique structures, can show an excellent from low (0.24–70.0%), gauge factor (1668.48) at compression 66.0%, wide range frequencies, detection limit (1.17 Pa), anultrafast response time (30 ms). dominated mechanism that under compression, slide through polydimethylsiloxane matrix reduces connection points between fibers, causing surge electrical resistance. In addition, because defective, change geometry also causes resistance composite compression. Furthermore, interfaces strengthen mechanical stability 0.01–1.0 Hz loadings strains, wrinkles surface increased tiny loadings. produce contact resistance, leading higher strains.