Fig. 2.

Characterization of hydrogel properties. (A) Conductivity of different hydrogels measured using a four-point probe (n = 3). (B) CV curves of different hydrogels. (C) EIS curves of different hydrogels. (D, E) Stress-strain curves (D) and elastic moduli (E) of different hydrogels (n = 3). (F) Rheological analysis of the hydrogels at 37 °C in a time sweep mode. (G) G′ and G″ of the OGGP3 hydrogel under different oscillation strains. (H) The rheological recovery property of the OGGP3 hydrogel was subjected to high strain (500%) followed by low strain (1%).