Polyelectrolyte Condensation Induced by Linear Cations

Details Polyelectrolyte Condensation Induced by Linear Cations Polyelectrolyte Condensation Induced by Linear Cations

2007-09-21

arxiv.org/abs/0709.3540v1

Phys. Rev. Lett. 99, 138302 (2007)

Physics

Condensed Matter

Soft Condensed Matter

To appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.99.138302

We examine the role of the condensing agent in the formation of polyelectrolyte bundles, via grand-canonical Monte Carlo simulations. Following recent experiments we use linear, rigid divalent cations of various lengths to induce condensation. Our results clarify and explain the experimental results for short cations. For longer cations we observe novel condensation behavior owing to alignment of the cations. We also study the role of the polyelectrolyte surface charge density, and find a nonmonotonic variation in bundle stability. This nonmonotonicity captures two trends that have been observed in separate experiments.

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