PEDOT:PSS Based Soft, Healable and Highly Adhesive Films for Monitoring Human Health

Flexible, soft, self-healing, and adhesive conductive materials with Young’s modulus matching biological tissues (with a moduli of 0.5-500 KPa)¹ are highly desired for applications in bioelectronics. Here, we report self-healing, stretchable, highly adhesive and conductive films obtained by mixing tannic acid (PVA), ethylene glycol, and Poly (3,4-ethylenedioxythiophene) doped with polystyrene sulfonate (PEDOT:PSS).² Our films demonstrated remarkable self-healing and self-adhesiveness, compliance on skin, outstanding stretchability, high adhesion on skin , and low Young’s modulus. Our films were used to fabricate electrophysiological epidermal patch electrodes, which exhibited high-quality recording of electrocardiography (ECG) and electromyography (EMG) signals, like commercial Ag/AgCl gel electrodes.