Polymer translocation through a nanopore under a pulling force
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© 2007 American Physical Society (APS). http://www.aps.org
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en
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061912/1-6
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Physical Review E, Volume 75, Issue 6
Abstract
We investigate polymer translocation through a nanopore under a pulling force using Langevin dynamics simulations. We concentrate on the influence of the chain length N and the pulling force F on the translocation time τ. The distribution of τ is symmetric and narrow for strong F. We find that τ∼N2 and translocation velocity v∼N−1 for both moderate and strong F. For infinitely wide pores, three regimes are observed for τ as a function of F. With increasing F, τ is independent of F for weak F, and then τ∼F−2+ν−1 for moderate F, where ν is the Flory exponent, which finally crosses over to τ∼F−1 for strong force. For narrow pores, even for moderate force τ∼F−1. Finally, the waiting time, for monomer s and monomer s+1 to exit the pore, has a maximum for s close to the end of the chain, in contrast to the case where the polymer is driven by an external force within the pore.Description
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Huopaniemi, Ilkka & Luo, Kaifu & Ala-Nissilä, Tapio & Ying, See-Chen. 2007. Polymer translocation through a nanopore under a pulling force. Physical Review E. Volume 75, Issue 6. P. 061912/1-6. ISSN 1539-3755 (printed). DOI: 10.1103/physreve.75.061912.