Boletín SEMA, No 49 (2009)

Tamaño de la letra:  Pequeña  Mediana  Grande

EFFECTS OF CHARGE-CHARGE INTERACTIONS AND EXTERNAL FIELDS IN SHAPE TRANSFORMATIONS OF CLOSED FILAMENTS

YU. B. Gaididei, C. Gorria, P.L. Christiansen, M.P. SøRENSEN, H. BÜTTNER

Resumen


The role of charge-charge interactions in shape transformations of
closed filaments induced by the charge-curvature coupling is studied. It is
shown that while sufficiently strong repulsive interaction between carriers
makes a circular shape of the filament energetically more favorable with
a spatially uniform charge distribution along the filament, the attractive
interaction facilitates a creation of polygonal filaments. The robustness
of the shape transformation process with respect to external forces which
are time and space periodic, is considered. It is shown that strong
enough external driving makes the shape of the filament and the charge
distribution along the filament highly irregular.

Key words: charge-charge interaction, polygonal shapes, closed filaments,
conformational transformation.


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