A hybrid hydrogel with in situ formed Ag-nanoparticles within 3D networks that exhibits broad antibacterial activities

A new hybrid hydrogel was constructed by in situ formed silver nanoparticles (Ag NPs) within the 3D network of a hydrogel based on a tryptophan derivative containing a phenylcarbinol side group (HAIP), which was trigged by natural light, without the need of UV-irradiation or the addition of capping reagents. Remarkably, in addition to excellent thixotropy and injectability, the hybrid Ag NPs-HAIP hydrogel exhibits broad antibacterial activities without cell cytotoxicity, which makes it a potential candidate for various biomedical applications.