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(a) Schematic illustration of glucose reacting with ZIF8/Au-GOx. (b) UV-Vis absorption spectra of TMB catalyzed by blank, H2O2, glucose (Glu), ZIF8/Au (ZA), ZIF8/Au + H2O2, ZIF8/Au + glucose, ZAG, and ZAG + glucose. (c) ESR spectra of ZAG NPs, glucose, ZIF8/Au NPs with H2O2, and ZAG NPs with glucose using DMPO as the radical-scavenging nitrogen trap. (d) The change of pH value during the reaction of ZAG with glucose.
