Electrochemical study on the semiconductor properties and fractal dimension of poly ortho aminophenol modified graphite electrode in contact with different aqueous electrolytes

The fractal dimension of poly ortho aminophenol (POAP) films in the presence of different counter ions was investigated. The POAP films were deposited on graphite electrode by cyclic voltammetry. The deposited films were also characterized by electrochemical impedance spectroscopy (EIS) in wide frequency range. The length scale, the distances between two nearest points that the anions somehow sense (by yardstick of the size of their jump-length), were also derived. The resulting Mott-Schottky plot of the polymer capacitance describes the reduced polymer as a p-type semiconductor with a flat band potential of about 200 mV vs. SCE. The discussion shows that the nature of the anion plays a major role on the electrochemical behavior of the polymer.