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(a) Cyclic voltammograms of the streptavidin-coated SPC electrode immersed in Zobell’s solution obtained at different scan rates (range: 25 to 200 mV·s–1). (b) Plot of the anodic peak current (Ipa) vs the square root of the scan rate (v1/2) and applied linear fit. (c) Plot of the cathodic peak current (Ipc) vs the square root of the scan rate (v1/2) and applied linear fit.
