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Glucose responsive properties of hydrogel: (a–c) the effect of glucose oxidase addition on the pH value of hydrogels (a): 0 mg/mL, (b): 2 mg/mL, (c): 4 mg/mL; (d) the internal and external glucose signals of xerogel were converted to pH signals; (e) the swelling of hydrogels added with GOx at different glucose concentrations. (The solid content of SF and CSF solution is 3 wt.%, HRP concentration is 10 U/mL, H2O2 concentration is 1 mM), n = 3.
