Effect of image forces on polyelectrolyte adsorption at a charged surface
Abstract
The adsorption of flexible and highly charged polyelectrolytes onto oppositely charged planar surfaces is investigated by means of Monte Carlo simulations. The effect of image forces stemming from the dielectric discontinuity at the substrate interface is analyzed. The influence, at fixed polyelectrolyte volume fraction, of chain length and surface-charge density is also considered. A detailed structural study, including monomer and fluid charge distributions, is provided. It is demonstrated that image forces can considerably reduce the degree of polyelectrolyte adsorption and, as a major consequence, inhibit the charge inversion of the substrate by the polyelectrolytes.
- Publication:
-
Physical Review E
- Pub Date:
- November 2004
- DOI:
- 10.1103/PhysRevE.70.051802
- arXiv:
- arXiv:cond-mat/0406088
- Bibcode:
- 2004PhRvE..70e1802M
- Keywords:
-
- 82.35.Gh;
- 82.35.Rs;
- 61.20.Qg;
- 61.20.Ja;
- Polymers on surfaces;
- adhesion;
- Polyelectrolytes;
- Structure of associated liquids: electrolytes molten salts etc.;
- Computer simulation of liquid structure;
- Condensed Matter - Soft Condensed Matter;
- Condensed Matter - Statistical Mechanics
- E-Print:
- 19 pages - 7 eps figs - RevTex 4 - submitted for publication