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
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Electrochemical and ellipsometric study of polypyrrol films in solutions containing ascorbic acid
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volumes 131–132, 15 March 2007, Pages 185-189
نویسندگان
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