Fig. 1. Design and synthesis of T-ECH for bio-interfacing devices.
a Schematic illustration of the template-directed in-situ synthesis of T-ECH. In Pre T-ECH, right after the template polymer (PAA) synthesis, PEDOT:PSS is in the colloidal state. After a drying and annealing process with DMSO solvent, T-ECH is made, having a highly conductive PEDOT network inside the template network. b Schematic illustration of the PEDOT:PSS network structure in the hydrogel with (left) and without (right) template polymer. c Schematic illustration and optical image of highly stretchable T-ECH (left). When stretched, PEDOT:PSS fibers align to the direction of the applied strain. Schematic illustration of tough adhesion of T-ECH with biological tissue (right). d Schematic illustration of tissue adhesive bio-electronic device made of T-ECA (adhesive T-ECH) electrode on the stretchable and dynamic biological tissue.