Polyelectrolyte Bundles

Details Polyelectrolyte Bundles Polyelectrolyte Bundles

2003-12-22

arxiv.org/abs/cond-mat/0312576v1

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 8 figures

Scientific paper

Using extensive Molecular Dynamics simulations we study the behavior of polyelectrolytes with hydrophobic side chains, which are known to form cylindrical micelles in aqueous solution. We investigate the stability of such bundles with respect to hydrophobicity, the strength of the electrostatic interaction, and the bundle size. We show that for the parameter range relevant for sulfonated poly-para-phenylenes (PPP) one finds a stable finite bundle size. In a more generic model we also show the influence of the length of the precursor oligomer on the stability of the bundles. We also point out that our model has close similarities to DNA solutions with added condensing agents, hinting to the possibility that the size of DNA aggregates is under certain circumstances thermodynamically limited.

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