Ultrathin Mo 2 S 3 Nanowire Network for High-Sensitivity Breathable Piezoresistive Electronic Skins

• Published in: ACS nano Vol. 17; no. 5; pp. 4862 - 4870
• Main Authors: Zhao, Chendong, Fang, Yuqiang, Chen, Hao, Zhang, Shaoning, Wan, Yingjie, Riaz, Muhammad Sohail, Zhang, Zhuang, Dong, Wujie, Diao, Lei, Ren, Dayong, Huang, Fuqiang
• Format: Journal Article
• Language: English
• Published: United States 14.03.2023
• Subjects: Electric Conductivity; Humans; Nanowires; Robotics; Skin; Wearable Electronic Devices; air permeability; electronic skin; Mo2S3 nanowire; gesture recognition; ultrathin; nanowire network
• ISSN: 1936-0851; 1936-086X
• DOI: 10.1021/acsnano.2c11564

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 S nanowires by inserting [Mo S] chains between MoS interlayers. The resulting Mo S nanowires feature high conductivity (4.9 × 10 S m ) and a high aspect ratio (∼200). An ultrathin (∼500 nm) Mo S nanowire network was fabricated using a simple liquid/liquid interface self-assembly method, showing high piezoresistive sensitivity (5.65 kPa ), 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.