Fig. 9. (A) A synergistic strategy against complex drug-resistant bacterial infections by combining quaternary ammonium cationic antibacterial property, GO photothermal antibacterial property, and antibiotic sustained release antibacterial property. (a) Schematic diagram of hydrogel preparation and application. Tests results of (b) the in vitro photothermal antibacterial property, (c) quaternary ammonium cationic antibacterial property and (d) in vivo photothermal antibacterial property. Reproduced from ref. 20 with the permission of American Chemical Society, copyright 2020. (B) CHs containing polydopamine-coated reduced GO significantly scavenge ROS and promote the proliferation of C2C12 cells, thereby promoting skin wound healing. Reproduced from ref. 41 with the permission of American Chemical Society, copyright 2019.