Driven polymer translocation through a cylindrical nanochannel: Interplay between the channel length and the chain length

Details Driven polymer translocation through a cylindrical nanochannel: Interplay between the channel length and the chain length Driven polymer translocation through a cylindrical nanochannel: Interplay between the channel length and the chain length

2012-03-22

arxiv.org/abs/1203.5118v1

Soft Matter, 8, 2769 (2012)

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 10 figures

Scientific paper

10.1039/c2sm06942c

Using analytical techniques and Langevin dynamics simulations, we investigate the dynamics of polymer translocation through a nanochannel embedded in two dimensions under an applied external field. We examine the translocation time for various ratio of the channel length $L$ to the polymer length $N$. For short channels $L\ll N$, the translocation time $\tau \sim N^{1+\nu}$ under weak driving force $F$, while $\tau\sim F^{-1}L$ for long channels $L\gg N$, independent of the chain length $N$. Moreover, we observe a minimum of translocation time as a function of $L/N$ for different driving forces and channel widths. These results are interpreted by the waiting time of a single segment.

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