Adsorption of polyelectrolytes from semi-dilute solutions on an oppositely charged surface

Details Adsorption of polyelectrolytes from semi-dilute solutions on an oppositely charged surface Adsorption of polyelectrolytes from semi-dilute solutions on an oppositely charged surface

2002-02-04

arxiv.org/abs/cond-mat/0202045v2

Phys. Chem. Chem. Phys. 10, 1697-1706 (2008)

Physics

Condensed Matter

Soft Condensed Matter

14 pages, 6 figures

Scientific paper

10.1039/b716014c

We propose a detailed description of the structure of the layer formed by polyelectrolyte chains adsorbed onto an oppositely charged surface in the semi-dilute regime. We combine the mean-field Poisson-Boltzmann-Edwards theory and the scaling functional theory to describe the variations of the monomer concentration, the electrostatic potential, and the local grafting density with the distance to the surface. For long polymers, we find that the effective charge of the decorated surface (surface plus adsorbed polyelectrolytes) can be much larger than the bare charge of the surface at low salt concentration, thus providing an experimental route to a "supercharging" type of effect.

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