Polyelectrolyte Adsorption

Details Polyelectrolyte Adsorption Polyelectrolyte Adsorption

2000-11-04

arxiv.org/abs/cond-mat/0011072v1

C. R. Acad. Sci. (Paris), Ser. IV, 1, 1153 (2000)

Physics

Condensed Matter

Soft Condensed Matter

11 pages, 4 PS figures (Latex/RevTex), submitted to C.R. Acad. Sci (Paris)

Scientific paper

10.1016/S1296-2147(00)01130-6

The problem of charged polymer chains (polyelectrolytes) as they adsorb on a planar surface is addressed theoretically. We review the basic mechanisms and theory underlying polyelectrolyte adsorption on a single surface in two situations: adsorption of a single charged chain, and adsorption from a bulk solution in $\theta$ solvent conditions. The behavior of flexible and semi-rigid chains is discussed separately and is expressed as function of the polymer and surface charges, ionic strength of the solution and polymer bulk concentration. We mainly review mean-field results and briefly comment about fluctuation effects. The phenomenon of polyelectrolyte adsorption on a planar surface as presented here is of relevance to the stabilization of colloidal suspensions. In this respect we also mention calculations of the inter-plate force between two planar surfaces in presence of polyelectrolyte. Finally, we comment on the problem of charge overcompensation and its implication to multi-layers formation of alternating positive and negative polyelectrolytes on planar surfaces and colloidal particles.

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