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(A) Two consecutive CVs were performed; on solutions of in situ generated diazonium cation. A starting potential of 0.4 V and a switching potential of −0.6 V at −0.1 V s–1; prior to the second scan the potential was held at −0.6 V for 120 s to confirm surface modification due to the blocking nature of the film. (B) Typical cyclic voltammograms obtained for solutions of 250 μM ferricyanide and 50 mM PBS at modified (in situ grafting of the diazonium cation) and unmodified electrodes.
