Figure 6: Stretchable hydrogel circuit board patterned on elastomer.
From: Skin-inspired hydrogel–elastomer hybrids with robust interfaces and functional microstructures
(a) Schematic illustration of fabrication procedure for conductive hydrogel circuit patterned on flexible elastomer substrate. (b) Ionically conductive PAAm-alginate hydrogel circuit bonded on an Ecoflex elastomer substrate using the proposed method is robust under large deformation without visible failure. (c) The hydrogel circuit board connected with an AC power source can light up LED, and it can maintain its electrical functionality even under severe deformation. (d) A hydrogel circuit bonded on Ecoflex elastomer without benzophenone treatment delaminates and fails under deformation, due to the weak hydrogel–elastomer bonding. Scale bars, 10 mm (b–d).
