Adsorption Transition of a Polyelectrolyte on a High-dielectric Charged Substrate

Details Adsorption Transition of a Polyelectrolyte on a High-dielectric Charged Substrate Adsorption Transition of a Polyelectrolyte on a High-dielectric Charged Substrate

2003-12-12

arxiv.org/abs/cond-mat/0312315v2

Physical Review E 70, 061805 (2004)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures

Scientific paper

10.1103/PhysRevE.70.061805

The behavior of a polyelectrolyte adsorbed on a charged surface of high-dielectric constant is studied by both Monte-Carlo simulation and analytical methods. It is found that in a low ionic strength medium, the transition is first-order with the repulsive charged surface. The order parameter which characterize the polyelectrolyte adsorption, the surface monomer density, follows a linear relation with surface charge density. It indicates the polyelectrolyte is always compressed on the substrate. No conformation change exists before the de-sorption. Finally, a new scaling law for the layer thickness is derived and verified by the simulation data.

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