Conformation and diffusion of a single polyelectrolyte chain in confined spaces of nano/microchannels: Simulation and experiment

Authors
Chun, Myung-SukLee, Duck-EuiKim, Chongyoup
Issue Date
2008
Publisher
AMER INST PHYSICS
Citation
15th International Congress on Rheology/80th Annual Meeting of the Society-of-Rheology, v.1027, pp.965 - +
Abstract
A coarse-grained modeling is based on the finitely extendable nonlinear elastic (FENE) spring with long-range electrostatic and hydrodynamic interactions between pairs of beads, where both flexible and semiflexible chains are developed. We also consider steric and electrostatic interactions between the bead and the confining walls of different charge condition. Brownian dynamics simulations with the xanthan polyelectrolyte in bulk solutions and under confinement in a slit channel revealed an interesting crossover behavior from the 3D chain to a 2D one. For experimental verifications, single molecule visualization is performed on fluorescently labeled xanthan using an inverted epifluorescence microscope. Both the conformation and diffusivity of single xanthan molecules are characterized with variations of the chain confinement and solution environments. We discuss the scaling predictions to describe the source of the observed free-draining diffusion dynamics.
ISSN
0094-243X
URI
https://pubs.kist.re.kr/handle/201004/116099
Appears in Collections:
KIST Conference Paper > 2008
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE