Theory of pore-driven and end-pulled polymer translocation dynamics through a nanopore: An overview

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 {\it trans} side friction term for a quantitative description of the translocation process.

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Cited by in corpus (7)

• Tracer diffusion in crowded narrow channels. Topical review
• Translocation of links through a pore: effects of link complexity and size
• Driven translocation of a semiflexible polymer through a conical channel in the presence of attractive surface interactions
• Polymer translocation through nanopore assisted by an environment of active rods
• Pulling a DNA molecule through a nanopore embedded in an anionic membrane: tension propagation coupled to electrostatics
• Velocity fluctuation and force scaling during driven polymer transport through a nanopore
• Polymer translocation driven by longitudinal and transversal time-dependent end-pulling forces