Chun, Myung-Suk Lee, Duck-Eui Kim, Chongyoup 2024-01-19T13:09:54Z 2024-01-19T13:09:54Z 2022-03-07 2008 0094-243X https://pubs.kist.re.kr/handle/201004/116099 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. English AMER INST PHYSICS Conformation and diffusion of a single polyelectrolyte chain in confined spaces of nano/microchannels: Simulation and experiment Conference 1 15th International Congress on Rheology/80th Annual Meeting of the Society-of-Rheology, v.1027, pp.965 - + 15th International Congress on Rheology/80th Annual Meeting of the Society-of-Rheology 1027 965 + US Monterey, CA 2008-08-03 XVTH INTERNATIONAL CONGRESS ON RHEOLOGY - THE SOCIETY OF RHEOLOGY 80TH ANNUAL MEETING, PTS 1 AND 2 000257623000314 2-s2.0-51149121652 Proceedings Paper