Title

Conformation and drift of a telechelic chain in porous media

Authors

Authors

A. Bhattacharya

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Phys.-Condes. Matter

Keywords

POLYMER-CHAIN; MOLECULAR-DYNAMICS; MONTE-CARLO; SIMULATION; DIFFUSION; FLOW; Physics, Condensed Matter

Abstract

The conformation and drift properties of a telechelic chain moving through a porous host of randomly distributed static obstacles are studied using Brownian dynamics simulation for a Grest-Kremer bead-spring model of polymer. Static chain conformations exhibit non-monotonic behaviour as a function of the impurity density p(imp) at zero bias. The chain initially shrinks due to an entropic barrier as the density of the obstacles pimp is increased. In the presence of the obstacles it requires only a tiny bias for a long chain to be mostly stretched. We then study the drift property of the chain as a function of the bias and impurity density. The drift velocity of the chain saturates beyond a threshold bias F-crit(x). This observation can be useful in designing DNA sequencing methods based on electrophorefic mobility.

Journal Title

Journal of Physics-Condensed Matter

Volume

16

Issue/Number

44

Publication Date

1-1-2004

Document Type

Article; Proceedings Paper

Language

English

First Page

S5203

Last Page

S5211

WOS Identifier

WOS:000225708800018

ISSN

0953-8984

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