(a) Schematic illustration of the FPAu hydrogels application for the fabrication and skeletal muscle regeneration. (b) Antibacterial activity of FPAu hydrogels. Reproduced with permission [144]. Copyright 2021, Elsevier. (c) Schematic illustration of the bacteria killing processes with the hybrid hydrogel under 808 nm NIR light irradiation. (d) Antibacterial activity of the copper loaded hybrid hydrogel. Reproduced with permission [145]. Copyright 2018, The Royal Society of Chemistry. (e) The structure and function of the cell-affinitive, recoverable, ultra-tough, and contact-antibacterial AMD-QCS hydrogel. (f) S. epidermidis and E. coli suspensions and OD measurement of the growth of S. epidermidis and E. coli that were cultured with different specimens for 24 h. OD: optical density. Reproduced with permission [52]. Copyright 2019, Wiley-VCH. (g) Schematic illustration of the antibacterial mechanism of positively charged dendritic polylysine. (h) Quantitative result of the bactericidal efficacy against E. coli and S. aureus and LIVE/DEAD fluorescence images of E. coli and S. aureus incubated with OCMC/G3KP hydrogels with different dendrimer concentrations. Scale bar, 0 μm (∗P < 0.05, ∗∗P < 0.01, and n = 5). Reproduced with permission [74]. Copyright 2020, American Chemical Society.