Polyelectrolyte adsorption and charge inversion View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1999-05

AUTHORS

J.F. Joanny

ABSTRACT

We discuss theoretically the adsorption of linear weakly charged polyelectrolyte solutions on an oppositely charged solid surface using the classical self-consistent mean field theory. If the solid surface has an indifferent short range interaction with the polymer (at the crossover point between attraction and repulsion), we show that its charge is always overcompensated by the adsorption of the polymer. At low ionic strength, the overcompensated charge per unit area is proportional to the inverse screening length \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document} and the thickness of the adsorbed layer is of the order of the thickness of a single adsorbed chain. At higher ionic strength, the electrostatic interaction is strongly screened and is equivalent to an effective excluded volume. The overcompensated charge is then proportional to the bare surface charge. These results provide a theoretical basis to explain the formation of the polyelectrolyte multilayers that have been made by successive adsorption of polyelectrolyte layers of opposite signs. More... »

PAGES

117-122

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s100510050747

DOI

http://dx.doi.org/10.1007/s100510050747

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1022786252


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