FIGURE 4.

(A) Macroscopic pictures of the resulting Gelatin NPs hydrogel composite (Gel-PDA-PAR₃₀) compared to pure Gelatin hydrogel (Gel). (B) Scanning Electron Microscopy images of the Gel-PDA-PAR₃₀ hydrogel. (C) Swelling properties of the Gel-PDA-PAR₃₀ hydrogel compared to pure Gelatin hydrogel at different time points in PBS at 37°C (n = 3 error bars correspond to standard deviations). (D) Kinetic of PDA-PAR₃₀-FITC NPs (non-diluted) release from Gelatin hydrogel at 37°C in PBS for 15 days. Fresh supernatant was added after each recording to perform cumulative release over time (n = 3 error bars correspond to standard deviations).