Translocation of an active polymer into a two dimensional circular nano- container

A Rezaie-Dereshgi and H Khalilian and J Sarabadani, JOURNAL OF PHYSICS- CONDENSED MATTER, 35, 355101 (2023).

DOI: 10.1088/1361-648X/acd673

Translocation dynamics of an active semi-flexible polymer through a nano-pore into a rigid two dimensional circular nano-container has been studied by using Langevin dynamics simulations. The results show that the force exponent beta, for regime of small nano-container radius, i.e. R << Rg, where Rg is the gyration radius of the passive semi-flexible polymer in two dimensional free space, is beta = -1, while for large values of R >> R-g the asymptotic value of the force exponent is beta approximate to -0.93. The force exponent is defined by the scaling form of the average translocation time proportional to F-sp(beta,) where F-sp is the self-propelling force. Moreover, using the definition of the turning number (number of net turns of the polymer configuration) for the polymer inside the cavity, it has been found that at the end of translocation process for small value of R and in the strong force limit the polymer configuration is more regular than the case in which the value of R is large or the force is weak.

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