Polymer Translocation through a Nanopore

Gebresilassie, Abel Gebreegziabher (2010) Polymer Translocation through a Nanopore. Masters thesis, Addis Ababa University.

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In this paper we investigate Monte Carlo simulation of polymer translocation through a nanopore. To this end we used the bond fluctuation method (BFM) to study the translocation process of a polymer chain of length N in two dimensions, in the absence of external force on the polymer (i.e. unbiased translocation). To overcome the entropic barrier we consider a polymer which is initially placed in the middle of the pore and study the average escape time τ needed for the polymer to completely exit the pore on either side of the end. Numerically we find that the escape time τ scales with the chain length N as τ ∼ N1+2ν, where ν is the Flory exponent as far as the pore is small enough. And this scaling agree with the translocation time of a polymer which passes through a nanopore in one direction only. In this work, we examine the interplay between the pore length L, width W and other parameters while simulating the translocation process. We also study the statistical properties of a polymer chain by calculating the average-squared end-to-end distance R2 and the average-squared radius of gyration Rg2 of a chain polymer; and the diffusion constant D for the dynamical properties.

Item Type: Thesis (Masters)
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Africana
Depositing User: Selom Ghislain
Date Deposited: 25 Jun 2018 12:19
Last Modified: 25 Jun 2018 12:19
URI: http://thesisbank.jhia.ac.ke/id/eprint/4271

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