Ultra-flexible and highly transparent hydrogel-based triboelectric nanogenerator for physiological signal monitoring**Resrach supported by National Natural Science Foundation of China Grant (No. 51705429)

Abstract

Wearable electronics and electric skin attract increasing attention, which demand high transparency, extensibility, and biocompatibility. In this work, a transparent and highly stretchable pyramidal hydrogel-based triboelectric nanogenerator (HTG) for tactile sensation and neck movement detection is reported. Hydrogel can be easily stretched to 800% of the initial length. The output property of HTG could reach up to 360V and 1.27mW. Meanwhile, a slight signal like blowing could also be detected by the proposed device. Besides, the charging time of the capacitor reveals the dependence of output property and frequency. This work provides a brilliant method for self-powered physiological signal monitoring.