Triple‐network‐based conductive polymer hydrogel for soft and elastic bioelectronic interfaces

Conductive polymer hydrogels have greatly improved the compatibility of electronic devices with biological tissues for human–machine interfacing. Hydrogels that possess low Young's modulus, interfacial impedance, and high tensile properties facilitate high-quality signal transmission across dynamic biointerfaces. Direct incorporation elastomers conductive polymers may result in undesirable mechanical and/or electrical performance. Here, a covalent cross-linking network an entanglement-driven poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) been combined. The triple-network hydrogel shows stretchability (with fracture strain up to 900%), impedance (down 91.2 Ω cm2), reversible adhesion. Importantly, ultra-low modulus 6.3 kPa) strain-insensitive electrical/electrochemical performance were achieved, which provides guarantee current stimulation. material design will contribute progression soft conformal bioelectronic devices, pave way future implantable electronics.