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(A) EIS plots recorded in 2.5 mM ferri-ferrocyanide + 1 mM potassium chloride + 100 mM potassium nitrate. (B) Mean and Standard Deviations (Bars) associated with the parameters obtained from equivalent circuit fitting (RS, CDL, RCT, RNL and global χ2) for clean and chemically modified microelectrodes (n = 6), recorded in 1.0 mM ferri-ferrocyanide + 1 mM potassium chloride + 100 mM potassium nitrate. N = 6 and error bars represent standard deviation.
