Behavior of rod-like polyelectrolytes near an oppositely charged surface

Details Behavior of rod-like polyelectrolytes near an oppositely charged surface Behavior of rod-like polyelectrolytes near an oppositely charged surface

2005-08-02

arxiv.org/abs/cond-mat/0508072v2

Physics

Condensed Matter

Soft Condensed Matter

Updated results - 19 pages - 10 figs - RevTex 4

Scientific paper

10.1063/1.2140692

The behavior of highly charged short rod-like polyelectrolytes near oppositely charged planar surfaces is investigated by means of Monte Carlo simulations. A detailed microstructural study, including monomer and fluid charge distribution, and chain orientation, is provided. The influence of chain length, substrate's surface-charge-density and image forces is considered. Due to the lower chain-entropy (compared to flexible chains), our simulation data show that rod-like polyelectrolytes can, in general, better adsorb than flexible ones do. Nonetheless, at low substrate-dielectric-constant, it is found that repulsive image forces tend to significantly reduce this discrepancy.

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