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Chemical Research in Chinese Universities ›› 2011, Vol. 27 ›› Issue (6): 1023-1026.

• Articles • Previous Articles     Next Articles

Nondriven polymer translocation through a nanopore: Scaling for translocation time with chain length

LI Hui, ZHANG Jing, LIU Hong* and SUN Chia-chung   

  1. State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130021, P. R. China
  • Received:2011-02-07 Revised:2011-03-28 Online:2011-11-25 Published:2011-11-07
  • Contact: LIU Hong E-mail:hongliu@jlu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foudation of China(No.21104025) and the China Postdoctoral Science Foudation(No.20110491295).

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Abstract: We investigated the dynamics of the passage for a polymer chain through a nanopore in the absence of any external driving force with Weeks-Chandler-Andersen potential in two-dimensional simulations, in particular, focused our attention on the scaling law of the mean translocation time. We found that the effect of hydrodynamic interactions is the major factor in determining the scaling exponents with increasing pore size. The scaling close to N1+2v was observed when the hydrodynamic interactions were screened in the cases of small pore sizes, while the scaling close to N3v was obtained when the hydrodynamic interactions were present in the cases of large pore sizes.

Key words: Translocation, Nondriven, Hydrodynamic interaction