Counterion-Mediated Attraction and Kinks on Loops of Semiflexible Polyelectrolyte Bundles | Zendy

A. Cēbers | Zendy; Zvonimir Dogic | Zendy; Paul A. Janmey | Zendy

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Counterion-Mediated Attraction and Kinks on Loops of Semiflexible Polyelectrolyte Bundles

Author(s) -

A. Cēbers,

Zvonimir Dogic,

Paul A. Janmey

Publication year - 2006

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.96.247801

Subject(s) - polyelectrolyte , counterion , curvature , chemical physics , counterion condensation , polyelectrolyte adsorption , attraction , materials science , physics , polymer , ion , composite material , quantum mechanics , linguistics , philosophy , geometry , mathematics

The formation of kinks in a loop of bundled polyelectrolyte filaments is analyzed in terms of the thermal fluctuations of charge density due to polyvalent counterions adsorbed on the polyelectrolyte filaments. It is found that the counterion-mediated attraction energy of filaments depends on their bending. By consideration of curvature elasticity energy and counterion-mediated attraction between polyelectrolyte filaments, the characteristic width of the kink and the number of kinks per loop is found to be in reasonable agreement with existing experimental data for rings of bundled actin filaments.

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