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Dynamics of polymer translocation into a circular nanocontainer through a nanopore

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10.1063/1.4712618

### Abstract

Using Langevin dynamics simulations, we investigate the dynamics of polymer translocation into a circular nanocontainer through a nanopore under a driving force *F*. We observe that the translocation probability initially increases and then saturates with increasing *F*, independent of ϕ, which is the average density of the whole chain in the nanocontainer. The translocation time distribution undergoes a transition from a Gaussian distribution to an asymmetric distribution with increasing ϕ. Moreover, we find a nonuniversal scaling exponent of the translocation time as chain length, depending on ϕ and *F*. These results are interpreted by the conformation of the translocated chain in the nanocontainer and the time of an individual segment passing through the pore during translocation.

© 2012 American Institute of Physics

Received 16 February 2012
Accepted 23 April 2012
Published online 11 May 2012

Acknowledgments: This work is supported by the “Hundred Talents Program” of Chinese Academy of Sciences (CAS) and the National Natural Science Foundation of China (Grant Nos. 21074126 and 21174140).

Article outline:

I. INTRODUCTION

II. MODEL AND METHODS

III. RESULTS AND DISCUSSIONS

A. Theory

B. Numerical results

1. Translocation probability as a function of the driving force *F* and the density of the chain ϕ

2. Distribution of the translocation time

3. Translocation time as a function of the density of the chain ϕ

4. Translocation time as a function of the chain length *N*

5. Translocation time as a function of the driving force *F*

6. Waiting time distributions

IV. CONCLUSIONS

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2012-05-11

2014-04-20

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