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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/4520

Title: Effect of hydrodynamic interaction on partially stretched polymers
Authors: SAIN, A
Keywords: dna-molecules
dynamics
flow
Issue Date: 2008
Publisher: AMER PHYSICAL SOC
Citation: PHYSICAL REVIEW E, 77(6), -
Abstract: We compute the effect of hydrodynamic interaction and stretching on the fluctuation properties of a polymer, with its end points held fixed. Computing the preaveraged hydrodynamic tensor exactly for this geometry, we study both flexible and semiflexible polymer chains, such as Zimm, freely jointed chain, and wormlike chain (WLC) models. We compare the spectra of relaxation-time scales for the effective normal modes of these models. The spectra differ across models with respect to the degree of stretch, but their power-law scaling with low mode numbers turns out to be the same. The characteristics of the transverse modes of WLC agree very well with the experimental data on DNA. The crossover scaling function for < 1/r >, the inverse of the distance along the polymer contour, yields a modified formula for the size of a "Pincus blob," appropriate for the fixed-end boundary condition.
URI: http://dx.doi.org/10.1103/PhysRevE.77.061919
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4520
http://hdl.handle.net/10054/4520
ISSN: 1539-3755
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