Dye-loaded polymers on semiconductor electrodes: Part I. The electrochemical behavior of n-SnO 2 modified by adsorption of poly(4-vinylpyridine) films containing an anionic dye

Abstract

The effect of surface modification of an n-type semiconductor on the electrochemical behavior of a soluble ferrocene derivative is reported. The incorporation of an anionic dye (croconate violet) into poly(vinylpyridine)-coated polycrystalline SnO 2 electrodes produces significant alteration of the kinetics of electrooxidation of solution phase redox couples. A mechanism involving diffusion of the electroactive substrate and/or an electron through the dye-loaded polymer film is suggested.