Figure 7.

(a) Change in the adsorbed amount (ΔΓ) and (b) specific enzyme activity of GOx/OTCE substrates as a function of the potential applied during the secondary adsorption experiments. (c) Cyclic voltammograms of GOx adsorbed onto the OTCE after adsorption at: A) +500 mV (the same response was observed at OCP); B) +650 mV; and C) +950 mV. All experiments were performed in 10 mmol·L⁻¹ citrate buffer at pH = 4.2 and a flow rate of 1 mL·min⁻¹.