Ellipsometric Measurements of the Optical Properties and Dynamics of Electrochemical Conversion in Films of Polyaniline

作者：Antonio Redondo, Edson Antonio Ticianelli, Shimshon Gottesfeld · 发表于：Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics · 年份：1988 · DOI：10.1080/15421408808083013 · 被引用次数：19 · 研究领域：Conducting polymers and applications、Photonic Crystals and Applications、Analytical Chemistry and Sensors

We report ellipsometric measurements on films of polyaniline grown galvanostatically on platinum electrodes in HCl solutions. The films were characterized optically in situ and under potential control. They were also studied while undergoing electrochemical conversion between the bleached (insulating) and colored (conducting) forms induced by an applied bias. We show that ellipsometry is capable of providing unique information on the details of the electrochemical film conversion process. We also show that these films present strong similarities in both ellipsometric and voltammetric behavior with hydrous oxide films undergoing similar voltage-driven color-bleach cycles.