Electrochemical and ellipsometric study of polypyrrol films in solutions containing ascorbic acid
| Autor: | J.O. Zerbino, L.J.H. Pesetti, M.G. Sustersic |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
In situ
Materials science Analytical chemistry Electrolyte Condensed Matter Physics Phosphate Electrochemistry Ascorbic acid Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Ellipsometry Electrode Materials Chemistry medicine Physical and Theoretical Chemistry Swelling medicine.symptom Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. :185-189 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2006.08.032 |
| Popis: | The growth of polypyrrol layers on gold electrodes in phosphate solutions of pH = 6.7 was analyzed using “in situ” voltammetric and ellipsometric techniques. Significant variations in optical indices and thickness were detected as a function of the applied potential and the aging time of storage in phosphate solutions with or without ascorbic acid. More compact layers were grown at 1.4 V vs. RHE than by applying a lower potential. The more compact layers show a slow but progressive increase in thickness or swelling after several hours of storage in the electrolyte. This effect increases when the interface is cathodically polarized. Optical indices and thickness of the layers formed under the different applied potential/time programmes were estimated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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