Extremely stretchable and healable ionic conductive hydrogels fabricated by surface competitive coordination for human-motion detection

The construction of a surface-wrinkled ionic conductive hydrogel with highly stretchable and healable properties for a skin-inspired pressure sensor is desirable yet challenging. Here, a stretching/competitively-coordinating/releasing (SCR) strategy is presented for preparing a self-buckled polyacrylamide/alginate hydrogel (SPAH). Due to its high stretchability, excellent ionic conductivity and programmable wrinkled surfaces, the SPAH can...