Bulletin of the American Physical Society
APS March Meeting 2010
Volume 55, Number 2
Monday–Friday, March 15–19, 2010; Portland, Oregon
Session A10: Focus Session: Single Molecule Biophysics and Chemical Physics I
8:00 AM–10:48 AM,
Monday, March 15, 2010
Sponsoring Units: DCP DBP DPOLY
Chair: David Rueda, Wayne State University
Abstract ID: BAPS.2010.MAR.A10.11
Abstract: A10.00011 : Out of Equilibrium Characteristics of a Forced Translocating Chain through a Nanopore*
10:24 AM–10:36 AM
Preview Abstract Abstract
( Johannes Gutenberg University)
(University of Central Florida)
Polymer translocation through a nano-pore in a thin membrane is studied using Langevin dynamics simulation with a particular emphasis to explore out of equilibrium characteristics of the translocating chain. We analyze the chain conformations both at the $cis$ and the $trans$ side separately. A detail picture of translocation emerges by monitoring the center of mass of the translocating chain, longitudinal and transverse components of the gyration radii and the end-to-end vector. We observe that polymer configurations at the $cis$ side are distinctly different from those at the $trans$ side. During the translocation, and immediately afterwards, different parts of the chain are characterized by a series of effective Flory exponents. We further notice that immediately after the translocation the last set of beads that have just translocated take a relatively compact structure compared to the first set of beads that translocated earlier and the translocation dynamics can be described as a propagating defect. We discuss implications of these results to the theoretical estimates and numerical simulation studies of the translocation exponent reported by various groups.
*Supported by Deutsche Forschungsgemeinschaft, SFB 625/A3 and from the Schwerpunkt f\"ur REchnergest\"utzte Forschung in den Naturwissenschaften (SRFN).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.A10.11
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