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Dynamics of end-pulled polymer translocation through a nanopore

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journal contribution
posted on 20.04.2018, 10:40 by Jalal Sarabadani, Bappa Ghosh, Srabanti Chaudhury, Tapio Ala-NissilaTapio Ala-Nissila
© 2018 EPLA. We consider the translocation dynamics of a polymer chain forced through a nanopore by an external force on its head monomer on the trans side. For a proper theoretical treatment we generalize the iso-flux tension propagation (IFTP) theory to include friction arising from the trans side subchain. The theory reveals a complicated scenario of multiple scaling regimes depending on the configurations of the cis and the trans side subchains. In the limit of high driving forces f such that the trans subchain is strongly stretched, the theory is in excellent agreement with molecular dynamics simulations and allows an exact analytic solution for the scaling of the translocation time τ as a function of the chain length N 0 and f. In this regime the asymptotic scaling exponents for are , and . The theory reveals significant correction-to-scaling terms arising from the cis side subchain and pore friction, which lead to a very slow approach to from below as a function of increasing N 0 .

Funding

This work has been supported in part by the Academy of Finland through its Centers of Excellence Program under project nos. 251748 and 284621.

History

School

  • Science

Department

  • Mathematical Sciences

Published in

EPL

Volume

120

Issue

3

Citation

SARABADANI, J. ...et al., 2018. Dynamics of end-pulled polymer translocation through a nanopore. EPL (Europhysics Letters), 120: 38004.

Publisher

© EPLA

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

07/01/2018

Publication date

2018

Notes

This paper was published in the journal EPL (Europhysics Letters) and the definitive published version is available at https://doi.org/10.1209/0295-5075/120/38004

ISSN

0295-5075

eISSN

1286-4854

Language

en

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