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

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.