Formation and Characterization of Heteropolyacid/Polycation Multilayer Films on Gold Electrode
- 1 January 2001
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 148 (5) , E227-E232
- https://doi.org/10.1149/1.1365146
Abstract
Ultrathin multilayer films of a polybasic lanthanide heteropoly tungstate-molybdate complex and a cationic polymer of quaternized poly(4-vinylpyridine) partially complexed with osmium bis(2,2′-bipyridine) have been fabricated on a gold electrode precoated with a cysteamine self-assembled monolayer. The multilayer films have been characterized by optical spectroscopy, small-angle X-ray diffraction, and electrochemical methods (cyclic voltammetry and electrochemical impedance). Especially, the electrochemical impedance spectroscopy is developed to monitor the layer deposition processes. It provides important information such as double-layer capacitance and charge-transfer resistance. All obtained results reveal regular film growth with each layer adsorption. © 2001 The Electrochemical Society. All rights reserved.Keywords
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