کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
598101 | 1454084 | 2006 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Early steps of the film growth mechanism in self-assembled multilayers of PAH and PSS on silica: Polymer uptake, charge balance and AFM analysis
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
This study investigates the growth of self-assembled polyelectrolyte films with strong polyacid (poly(styrene sulfonate), PSS and a weak polybase (poly(allylamine hydrochloride), PAH at pH 9. Addressing the deposit of the first 3 bilayers, we focus on the successive adsorption isotherms, the effect of maintaining a constant pH, the charge balance and the counterions co-adsorption in the successive steps. We also present stepwise AFM images of the film grown on a silica wafer, showing a very heterogeneous morphology with bumps and valleys, totally unlike the expected regular superposition of bi-dimensional polymer layers. Finally, a sketch of the growth mechanism is proposed, featuring most of the experimental observations in the study.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 288, Issues 1–3, 5 October 2006, Pages 26–35
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 288, Issues 1–3, 5 October 2006, Pages 26–35
نویسندگان
J. Dejeu, L. Buisson, M.C. Guth, C. Roidor, F. Membrey, D. Charraut, A. Foissy,