Fig. 3

a The viscosity profile of the P407 hydrogels at various concentrations (15%, 18%, 20%, 22%, 25%) altered with increasing temperature. b Variation of viscoelastic parameters (η*, G’, G’’) of 18% P407 at different temperatures. c The viscosity profile of the P407 hydrogels (18%) after adding HA at various concentrations (0.1%, 0.15%, 0.2%, 0.25%) altered with increasing temperature. d Variation of viscoelastic parameters (η*, G’, G’’) of 18% P407 added with 0.20% HA at different temperatures. e SEM of HP gel and HPP@Cu gel. Scale bars = 100 μm. f Images of HPP@Cu gel at 4 ℃ or 37 ℃. g Release profile of Cu NDs loaded by HPP@Cu gel. Data represent means ± SD from three independent replicates