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CV of 2.5 mM ferricyanide in PBS buffer on various electrodes assayed at a scan rate of 0.1 V s−1. Electrochemical surface area for GSPE is (0.149 ± 0.009) cm2 (roughness factor of 1.19) and for activated GSPE is (0.171 ± 0.010) cm2 (roughness factor of 1.36).
