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IPM
30
YEARS OLD

“School of Nano-Sciences”

Paper   IPM / Nano-Sciences / 15416
   School of Nano Science
  Title: Theory of pore-driven and end-pulled polymer translocation dynamics through a nanopore: an overview
  Author(s):
1 . Jalal Sarabadani
2 . Tapio Ala-Nissila
  Status: Published
  Journal: J. Physics: Condens. Matter
  No.: 27
  Vol.: 30
  Year: 2018
  Pages: 274002
  Supported by: IPM
  Abstract:
We review recent progress on the theory of dynamics of polymer translocation through a nanopore based on the iso-flux tension propagation (IFTP) theory. We investigate both pore-driven translocation of flexible and a semi-flexible polymers, and the end-pulled case of flexible chains by means of the IFTP theory and extensive molecular dynamics (MD) simulations. The validity of the IFTP theory can be quantified by the waiting time distributions of the monomers which reveal the details of the dynamics of the translocation process. The IFTP theory allows a parameter-free description of the translocation process and can be used to derive exact analytic scaling forms in the appropriate limits, including the influence due to the pore friction that appears as a finite-size correction to asymptotic scaling. We show that in the case of pore-driven semi-flexible and end-pulled polymer chains the IFTP theory must be augmented with an explicit trans side friction term for a quantitative description of the translocation process.

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