EIS studies of electrodeposition process of manganese and copper doped ZnO wires

Electrodeposition of manganese‐ and copper‐doped ZnO wires into polycarbonate membranes, from an aqueous solution containing 0.05 mol dm −3 Zn(NO 3 ) 2 + 0.01 mol dm −3 Mn(NO 3 ) 2 + 0.0005 mol dm −3 Cu(NO 3 ) 2 + 0.0075 mol dm −3 lactic acid, pH = 4.7 was investigated using linear sweep voltammetry and electrochemical impedance spectroscopy (EIS). The equivalent electrical circuits for fitting experimental results were similar to those for characterization of metal/polymer coating systems. Impedance data and voltammetric curves showed that an increase of local pH due to reduction process of nitrate ions induces the co‐precipitations of metal ions in the proximity of electrode as oxides.