Polymer Translocation through a Nanopore
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Date
2010-07
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Addis Ababa University
Abstract
In this paper we investigate Monte Carlo simulation of polymer translocation through
a nanopore. To this end we used the bond
uctuation 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 needed for the polymer to completely exit the pore on
either side of the end. Numerically we nd that the escape time scales with the chain
length N as N1+2 , where 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 R2
g of a chain polymer;
and the di usion constant D for the dynamical properties
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Polymer Translocation