Fig. 1

(A, B) Preparation of AgNP–PADM hydrogels. (C, D) H&E and DAPI stainings of the porcine skin extracellular matrix showing that cells are completely cleared. (E, F) 5 nm and 50 nm AgNP solutions and 5 nm AgNP–PADM hydrogels exhibited maximum UV–Vis absorption at 400 nm. 50 nm AgNP–PADM hydrogels did not exhibit any obvious absorption. (G, H) Changes in 5 and 50 nm AgNP size and diameter before and after AgNPs were released from hydrogel