Journal Article

PreJuSER-57335

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Free energy and extension of a semiflexible polymer in cylindrical confining geometries

Yang, Y.FZJ* ; Burkhardt, T. W.FZJ* ; Gompper, G.FZJ*

2007
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/9244  doi:10.1103/PhysRevE.76.011804

Abstract: We consider a long, semiflexible polymer with persistence length P and contour length L fluctuating in a narrow cylindrical channel of diameter D. In the regime D < P < L the free energy of confinement Delta F and the length of the channel R-parallel to occupied by the polymer are given by Odijk's relations Delta F/R-parallel to=A(o)k(B)TP(-1/3)D(-2/3) and R-parallel to=L[1-alpha(o)(D/P)(2/3)], where A(o) and alpha(o) are dimensionless amplitudes. Using a simulation algorithm inspired by the pruned enriched Rosenbluth method, which yields results for very long polymers, we determine A(o) and alpha(o) and the analogous amplitudes for a channel with a rectangular cross section. For a semiflexible polymer confined to the surface of a cylinder, the corresponding amplitudes are derived with an exact analytic approach. The results are relevant for interpreting experiments on biopolymers in microchannels or microfluidic devices.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Theorie der Weichen Materie und Biophysik (IFF-2)
2. Jülich-Aachen Research Alliance - Simulation Sciences (JARA-SIM)

Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2007

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Database coverage:
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