fig1

Figure 1. Schematic illustration of the components, catalytic activity, and stimulus-responsive properties of metal-based nanozyme-engineered hydrogels. CNT: Carbon nanotube; MOF: metal-organic framework; CNE: composite nanozyme; SAzymes: single-atom nanozymes; PEG: polyethylene glycol; PVA: polyvinyl alcohol; ROS: reactive oxygen species; SOD: superoxide dismutase; CAT: catalase; GPx: glutathione peroxidase; POD: peroxidase; GOx: glucose oxidation; UV: ultraviolet.