Fig. 2.

a) Photographs demonstrating the formation of between the aqueous suspension of AHI-loaded mSiO₂ and GCS and the OSA solution for 60 s in PBS (pH 7.4). b) Drug release curves of GOA hydrogels, AHI-loaded mSiO₂NPs, and GOAS composite hydrogels. SEM images (c–f) of GOAS composite hydrogels after freeze drying viewed from cross-section and e) measuring section of. Scale bar: 1 mm. d) and f) Partial enlargement images of c) and e), respectively. Scale bar: 500 nm.