This article has an erratum: [erratum]
Volume 87, Number 3, August 2009
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||24 August 2009|
Plectoneme creation reduces the rotational friction of a polymer
Yukawa Institute for Theoretical Physics, Kyoto University - Kyoto 606-8502, Japan
2 Department of Physics, Technical University Munich - 85748 Garching, Germany, EU
Accepted: 15 July 2009
The torsional dynamics of a semiflexible polymer with a contour length L larger than its persistence length Lp that is rotated at fixed frequency at one end is studied by scaling arguments and hydrodynamic simulations. We find a non-equilibrium transition at a critical frequency : In the linear regime, , axial spinning is the dominant dissipation mode. In the non-linear regime, , the twist dissipation mode involves the continuous creation of plectonemes close to the driven end and the rotational friction is substantially reduced.
PACS: 87.15.H- – Dynamics of biomolecules / 87.16.Ka – Filaments, microtubules, their networks, and supramolecular assemblies / 47.15.G- – Low-Reynolds-number (creeping) flows
© EPLA, 2009
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