کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
194074 459784 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An EQCM study of the deposition and doping/dedoping behavior of polypyrrole from phosphoric acid solutions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
An EQCM study of the deposition and doping/dedoping behavior of polypyrrole from phosphoric acid solutions
چکیده انگلیسی

The potentiostatic deposition of polypyrrole (PPy) from 0.1 M aqueous phosphoric acid solution and the doping/dedoping behavior of the resulting films have been investigated by the electrochemical quartz crystal microbalance (EQCM) technique. The change of the complex shear modulus during the film growth and during the doping/dedoping were calculated using the acoustic impedance method. It was found that the films contain only ca. 1 wt% water in the oxidized state which is in accordance with their relatively high storage modulus of 38 MPa and low loss tangent of 0.05. Comparing H3PO4 (pH 1) and NaH2PO4 (pH 8) it was found that the doping/dedoping in the latter is accompanied by a strong increase of the surface roughness which is a direct result of cation exchange present at pH 8.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 52, Issue 9, 15 February 2007, Pages 3040–3046
نویسندگان
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