Figure 4.

(A) Schematic diagram of GSH-Au NF aggregation and activated peroxidase induced by Hg²⁺. Reproduced with permission from [53]. Copyright 2022, Elsevier. (B) (a): Schematic description of Fe₂O₃/Au hybrid nano-enzyme for glucose consumption and •OH generation. (b): Comparison of GOx activity of Fe₂O₃, Au NPs and Fe₂O₃/Au. (c): The changes in dissolved O₂ over time are induced by Fe₂O₃/Au in the presence of glucose with different concentrations (0, 100 and 500 mM). (d): absorption of TMB incubating with H₂O₂ and Fe₂O₃/Au. Reproduced with permission from [56]. Copyright 2023, Elsevier.