کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5413621 | 1506632 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical and ellipsometric study of polypyrrol films in solutions containing ascorbic acid
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The growth of polypyrrol layers on gold electrodes in phosphate solutions of pHÂ =Â 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 1.4Â 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volumes 131â132, 15 March 2007, Pages 185-189
Journal: Journal of Molecular Liquids - Volumes 131â132, 15 March 2007, Pages 185-189
نویسندگان
J.O. Zerbino, L.J.H. Pesetti, M.G. Sustersic,