A Wearable, Anti-Freezing, and Healable Epidermal Sensor Assembled from Long-Lastingly Moist Conductive Nanocomposite Organohydrogel

Flexible wearable soft epidermal sensors assembled from conductive hydrogels have recently attracted tremendous research attention because of their extensive and significant applications in body-attachable healthcare monitoring, ultrasensitive electronic skins, and personal healthcare diagnosis. However, traditional conductive hydrogels inevitably face the challenge of long-term usage under room temperature and cold conditions, due to the lost water, elasticity and conductivity at room temperature, and freezing at the water icing temperatures. It severely limits the applications in flexible electronics at room temperature or cold environment. Herein we report a flexible, wearable, anti-freezing, and healable epidermal sensor assembled from the anti-freezing, long-lastingly moist and conductive organohydrogel. The nanocomposite organohydrogel is prepared from the conformal coating of functionalized reduced graphene oxide (rGO) network by the hydrogel polymer networks consisting of polyvinyl alcohol (PVA), ...