Counterion-mediated Electrostatic Interactions between Helical Molecules

Details Counterion-mediated Electrostatic Interactions between Helical Molecules Counterion-mediated Electrostatic Interactions between Helical Molecules

2008-07-10

arxiv.org/abs/0807.1586v1

Soft Matter, 2009, 5, 868-877

Physics

Condensed Matter

Soft Condensed Matter

11 pages, 12 figures

Scientific paper

10.1039/B811795K

We study the interaction of two cylinders with helical charge distribution mediated by neutralizing counterions, by analyzing the separation as well as the azimuthal angle dependence of the interaction force in the weak and strong coupling limit. While the azimuthal dependence of the interaction in the weak coupling limit is overall small and mostly negligible, the strong coupling limit leads to qualitatively new features of the interaction, among others also to an orientationally dependent optimal configuration that is driven by angular dependence of the correlation attraction. We investigate the properties of this azimuthal ordering in detail and compare it to existing results.

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