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(A) Amperometric I-t curves of platinum electrodes in PBS (10 mM; pH 7) held at +0.380 V and modified with C6 MPC-doped HMTES xerogels (with XOx) with and without PU capping layers, along with PU only-modified and bare platinum electrodes during the 100 µL injection of 40 mM XAN at 1200 s and 100 µL injection of CAT enzyme (10 mg/mL) at 2100 s. (B) Schematic illustration of critical, complementary role of the PU semi-permeable membrane once H2O2 is generated within the film.
