Silver Nanowire/Silver/Poly(dimethylsiloxane)\nas Strain\nSensors for Motion Monitoring

Abstract

Stretchable resistive sensors attract wide attention\ndue to their\nfeasible fabrication method and promising application prospect, while\nthe sensitivity (gauge factor (GF)) and response time for quick and\neffective response in working are very important for stretchable resistive\nsensors. Herein, a facile method combined with solution coating and\nlaser direct writing is promoted to fabricate a silver nanowire/silver/poly­(dimethylsiloxane)\n(AgNW/Ag/PDMS) strain sensor. The reduced Ag welds the AgNWs to make\nthe conductive layer robust for deformation, and the obtained stretchable\nresistive sensor has a high GF of 623.2, a short response time of\n51 ms, a recovery time of 50 ms, a wide sensing range beyond 35%,\nand good cyclic repeatability (over 2000 times). The sensor features\nhighly sensitive and stable performance for monitoring diverse human\nand mechanical motions, demonstrating a promising and attractive application\nfor wearable devices and human–machine interaction.