Fig. 3: Mechanical test of ultra-flexible transparent electrodes.

a Schematic of fabrication of ultra-flexible transparent electrodes on parylene/SU-8 substrate. b Optical images of PEI/Ag electrodes from pre-stretched condition (200% tensile strain) to compressed condition (0% tensile strain) in tensile strain steps of 50%. c Images of ultrathin PEI/Ag electrodes laminated into polymeric elastomer from pre-stretched condition (200% tensile strain) to compressed condition (0% tensile strain) in tensile strain steps of 50%. Change in resistance in the ITO, PEI/Ag, and DMD electrodes (d), under a series of compression and (e), after repetitive cycles of compression–release.