Dynamical scaling exponents for polymer translocation through a nanopore

被引：99

作者：

Luo, Kaifu ^{[1
]}

Ollila, Santtu T. T. ^{[1
]}

Huopaniemi, Ilkka ^{[1
]}

Ala-Nissila, Tapio ^{[1
,2
]}

Pomorski, Pawel ^{[3
]}

Karttunen, Mikko ^{[3
]}

Ying, See-Chen ^{[2
]}

Bhattacharya, Aniket ^{[4
]}

机构：

[1] Aalto Univ, Dept Appl Phys, FIN-02015 Espoo, Finland

[2] Brown Univ, Dept Phys, Providence, RI 02912 USA

[3] Univ Western Ontario, Dept Appl Math, London, ON N6A 5B7, Canada

[4] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA

来源：

PHYSICAL REVIEW E | 2008年 / 78卷 / 05期

基金：

芬兰科学院; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1103/PhysRevE.78.050901

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

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.

引用

页数：4

共 32 条

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[3]

De Gennes PG., 1979, SCALING CONCEPTS POL

[4]

Doi M., 1986, The Theory of Polymer Dynamics

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