Title

Dynamical scaling exponents for polymer translocation through a nanopore

Authors

Authors

K. F. Luo; S. T. T. Ollila; I. Huopaniemi; T. Ala-Nissila; P. Pomorski; M. Karttunen; S. C. Ying;A. Bhattacharya

Comments

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Abstract

We determine the scaling exponents of polymer translocation (PT) through a nanopore by extensive computer simulations of various microscopic models for chain lengths extending up to N=800 in some cases. We focus on the scaling of the average PT time tau similar to N-alpha and the mean-square change of the PT coordinate, < s(2)(t)>similar to t(beta). We find alpha=1+2 nu and beta=2/alpha for unbiased PT in two dimensions (2D) and three dimensions (3D). The relation alpha beta=2 holds for driven PT in 2D, with a crossover from alpha approximate to 2 nu for short chains to alpha approximate to 1+nu for long chains. This crossover is, however, absent in 3D where alpha=1.42 +/- 0.01 and alpha beta approximate to 2.2 for N approximate to 40-800.

Journal Title

Physical Review E

Volume

78

Issue/Number

5

Publication Date

1-1-2008

Document Type

Article

WOS Identifier

WOS:000261213600003

ISSN

1539-3755

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