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Adsorption-assisted translocation of a chain molecule through a pore

Kumar, Kiran K and Sebastian, KL (2000) Adsorption-assisted translocation of a chain molecule through a pore. In: Physical Review E, 62 (5). pp. 7536-7539.

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We analyze the free energy for translocation of a polymer from the outside of a spherical vesicle to the inside. The process is assumed to be driven by the adsorption of the polymer on the inner surface of the vesicle. We argue that in the case where the polymer is adsorbed on the outer surface too, the entropic barrier for translocation is absent. We analyze the adsorption process and find the free energy profile for the translocation. We argue that the motion corresponds to a polymer crossing a region with a change in free energy per segment.Based upon our earlier analysis of the behavior of kinks in such a problem, we conclude that the translocation can occur with a crossing time $t_{trans^{\sim}N}$.

Item Type: Journal Article
Publication: Physical Review E
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 02 Aug 2006
Last Modified: 19 Sep 2010 04:30
URI: http://eprints.iisc.ac.in/id/eprint/7982

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