Next Article in Journal
The Influence of Alkoxy Substitutions on the Properties of Diketopyrrolopyrrole-Phenyl Copolymers for Solar Cells
Next Article in Special Issue
Drift in Diffusion Gradients
Previous Article in Journal
Preparation and Characterization of New Geopolymer-Epoxy Resin Hybrid Mortars
Previous Article in Special Issue
Diffusion Study by IR Micro-Imaging of Molecular Uptake and Release on Mesoporous Zeolites of Structure Type CHA and LTA
Materials 2013, 6(7), 3007-3021; doi:10.3390/ma6073007

Charged Polymers Transport under Applied Electric Fields in Periodic Channels

1,*  and 1,2
1 Leibniz-Institut f¨ur Polymerforschung Dresden, Hohe Str. 6, Dresden 01069, Germany 2 Institute of Theoretical Physics, Technische Universität Dresden, Dresden 01069, Germany
* Author to whom correspondence should be addressed.
Received: 3 June 2013 / Revised: 10 July 2013 / Accepted: 11 July 2013 / Published: 19 July 2013
(This article belongs to the Special Issue Diffusion in Micropores and Mesopores 2013)
View Full-Text   |   Download PDF [2454 KB, uploaded 19 July 2013]   |   Browse Figures


By molecular dynamics simulations, we investigated the transport of charged polymers in applied electric fields in confining environments, which were straight cylinders of uniform or non-uniform diameter. In the simulations, the solvent was modeled explicitly and, also, the counterions and coions of added salt. The electrophoretic velocities of charged chains in relation to electrolyte friction, hydrodynamic effects due to the solvent, and surface friction were calculated. We found that the velocities were higher if counterions were moved away from the polymeric domain, which led to a decrease in hydrodynamic friction. The topology of the surface played a key role in retarding the motion of the polyelectrolyte and, even more so, in the presence of transverse electric fields. The present study showed that a possible way of improving separation resolution is by controlling the motion of counterions or electrolyte friction effects.
Keywords: molecular dynamics; polyelectrolytes; confinement molecular dynamics; polyelectrolytes; confinement
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
MDPI and ACS Style

Nedelcu, S.; Sommer, J.-U. Charged Polymers Transport under Applied Electric Fields in Periodic Channels. Materials 2013, 6, 3007-3021.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here


[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert