Moldable and transferrable conductive nanocomposites for epidermal electronics

Skin-inspired soft and stretchable electronic devices based on functional nanomaterials have broad applications such as health monitoring,human-machine interface,and the Internet of things.Solution-processed conductive nanocomposites have shown great promise as a building block of soft and stretchable electronic devices.However,realizing conductive nanocomposites with high conductivity,electromechanical stability,and low modulus over a large area at sub-100μm resolution remains challenging.Here,we report a moldable,transferrable,high-performance conductive nanocomposite comprised of an interpenetrating network of silver nanowires and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate).The stacked structure of the nanocomposite synergistically integrates the complementary electrical and mechanical properties of the individual components.We patterned the nanocomposite via a simple,low-cost micromolding process and then transferred the patterned large-area electrodes onto various substrates to realize soft,skin-interfaced electrophysiological sensors.Electrophysiological signals measured using the nanocomposite electrodes exhibit a higher signal-to-noise ratio than standard gel electrodes.The nanocomposite design and fabrication approach presented here can be broadly employed for soft and stretchable electronic devices.