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Conformational transformations induced by the charge-curvature interaction at finite temperature

Yu. B. Gaididei

C. Gorria

P. L. Christiansen

M. P. Sørensen

  • Bogolyubov Institute for Theoretical Physics, Metrologichna street 14 B, 01413, Kiev, Ukraine

  • Department of Applied Mathematics and Statistics, University of the Basque Country, E-48080 Bilbao, Spain

  • Informatics and Mathematical Modeling and Department of Physics, The Technical University of Denmark, DK-2800 Lyngby, Denmark

  • Department of Mathematics, The Technical University of Denmark, DK-2800 Lyngby, Denmark

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Phys. Rev. E 78, 051908 – Published 11 November, 2008

DOI: https://doi.org/10.1103/PhysRevE.78.051908

Abstract

The role of thermal fluctuations in the conformational dynamics of a single closed filament is studied. It is shown that, due to the interaction between charges and bending degrees of freedom, initially circular aggregates may undergo transformation to a polygonal shape. The transition occurs in the cases of hardening and softening charge-bending interaction. In the former case the charge and curvature are smoothly distributed along the chain, while in the latter spontaneous kink formation is initiated. The transition to a noncircular conformation is analogous to a phase transition of the second kind.

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Phys. Rev. E 78, 051908– Published 11 November, 2008
  • Received 30 April 2008

© 2008 American Physical Society

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