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Polymer translocation out of confined environments

Kaifu Luo1,*, Ralf Metzler1, Tapio Ala-Nissila2,3, and See-Chen Ying3

  • 1Physics Department, Technical University of Munich, D-85748 Garching, Germany
  • 2Department of Applied Physics, Helsinki University of Technology, P.O. Box 1100, FIN-02015 TKK Espoo, Finland
  • 3Department of Physics, Brown University, P.O. Box 1843, Providence, Rhode Island 02912-1843, USA

  • *Author to whom correspondence should be addressed. luokaifu@gmail.com
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Phys. Rev. E 80, 021907 – Published 11 August, 2009

DOI: https://doi.org/10.1103/PhysRevE.80.021907

Abstract

We consider the dynamics of polymer translocation out of confined environments. Analytic scaling arguments lead to the prediction that the translocation time scales like τ∼Nβ+ν2DR1+(1−ν2D)/ν for translocation out of a planar confinement between two walls with separation R into a three-dimensional (3D) environment, and τ∼Nβ+1R for translocation out of two strips with separation R into a two-dimensional (2D) environment. Here, N is the chain length, ν and ν2D are the Flory exponents in 3D and 2D, and β is the scaling exponent of translocation velocity with N, whose value for the present choice of parameters is β≈0.8 based on Langevin dynamics simulations. These scaling exponents improve on earlier predictions.

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Phys. Rev. E 80, 021907– Published 11 August, 2009
  • Received 20 October 2008

© 2009 American Physical Society

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