Forced and spontaneous translocation dynamics of a semiflexible active polymer in two dimensions

Tan, Fei; Wang, Jingli; Yan, Ran; Zhao, Nanrong

doi:10.1039/d3sm01409f

Soft Matter

2024

DOI: 10.1039/d3sm01409f

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Forced and spontaneous translocation dynamics of a semiflexible active polymer in two dimensions

Fei Tan,

Jingli Wang,

Ran Yan

et al.

Abstract: Polymer translocation is a fundamental topic in non-equilibrium physics and is crucially important to many biological processes in life. In the present work, we adopt two-dimensional Langevin dynamics simulations to...

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Translocation of two-dimensional active polymers through nanopores using Langevin dynamics simulations

Hu,

Shen,

Luo

2024

The Journal of Chemical Physics

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The translocation of polymers through nanopores is a complex process influenced by various factors. In this study, the translocation behavior of a two-dimensional active polymer chain, comprised of a head active Brownian particle (ABP) and a tail passive polymer chain, through a nanopore is studied using Langevin dynamics simulations. Results show that the effect of the self-propulsion force of the ABP on the translocation differs significantly from the driving force inside the pore for traditional polymer translocations. Specifically, the translocation time τ initially increases with increasing the magnitude fs of the self-propulsion force and then decreases with a further increase in fs. A small fs lowers the potential barrier for the translocation and thus promotes slow translocations, whereas a large fs directly pulls the polymer chain through the nanopore following the scaling relation τ ∝ fs−1. Moreover, two asymptotic scaling relations between τ and polymer length N, τ ∝ Nα, are found, with the exponent α of about 2.5 for small fs or long N and the exponent α of about 1.4 for short active polymers with large fs. We discover that the slow rotation of the ABP accelerates the translocation process.

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Translocation of two-dimensional active polymers through nanopores using Langevin dynamics simulations

Hu,

Shen,

Luo

2024

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

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Forced and spontaneous translocation dynamics of a semiflexible active polymer in two dimensions

Abstract: Polymer translocation is a fundamental topic in non-equilibrium physics and is crucially important to many biological processes in life. In the present work, we adopt two-dimensional Langevin dynamics simulations to...

Cited by 1 publication

References 65 publications

Translocation of two-dimensional active polymers through nanopores using Langevin dynamics simulations

Translocation of two-dimensional active polymers through nanopores using Langevin dynamics simulations

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