Paint‐On Epidermal Electronics for On‐Demand Sensors and Circuits

Abstract Wearable sensors continually evolve to become more epidermal‐like, yet still face challenges pertaining to conformability and reliance on wires and power sources. Herein, a nontoxic silver conductive ink made from children's school glue is used as a versatile medium for rapid, on‐demand wearable sensor development. This conductive ink can be painted directly onto the skin and to achieve dry electronics with maximal skin contact suitable for electrocardiogram use. Multilayer pressure sensors and near‐field communication (NFC) resonators manufactured using the silver ink demonstrate wireless and battery‐free capabilities for physiological monitoring purposes.