Ultrathin Mo<sub>2</sub>S<sub>3</sub> Nanowire Network for High-Sensitivity Breathable Piezoresistive Electronic Skins
Chendong Zhao, Yuqiang Fang, Hao Chen, Shaoning Zhang, Yingjie Wan, Muhammad Sohail Riaz, Zhuang Zhang, Wujie Dong, Lei Diao, Dayong Ren, Fuqiang Huang
Abstract
Flexible piezosensing electronic skins (e-skins) have attracted considerable interest owing to their applications in real-time human-health monitoring, human–machine interactions, and soft bionic robot perception. However, the fabrication of piezosensing e-skins with high sensitivity, biological affinity, and good permeability at the same time is challenging. Herein, we designed and synthesized Mo 2 S 3 nanowires by inserting ∞ 1 [Mo 2+ S] chains between MoS 2 interlayers. The resulting Mo 2 S 3 nanowires feature high conductivity (4.9 × 10 4 S m –1 ) and a high aspect ratio (∼200). An ultrathin (∼500 nm) Mo 2 S 3 nanowire network was fabricated using a simple liquid/liquid interface self-assembly method, showing high piezoresistive sensitivity (5.65 kPa –1 ), a considerably low pressure detection limit (0.08 Pa), and gratifying air permeability. Moreover, this nanowire network can be directly attached to human skin for real-time human pulse detection, finger movement monitoring, and sign language recognition, exhibiting excellent potential for health monitoring and human–machine interactions.