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Polymers 2016, 8(12), 438; doi:10.3390/polym8120438

Electroosmotic Flow in Mixed Polymer Brush-Grafted Nanochannels

1,* and 2,*
1
College of Mechanical and Electrical Engineering, Jiaxing University, Jiaxing 314001, China
2
Center for Simulational Physics, Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA
*
Authors to whom correspondence should be addressed.
Academic Editor: Martin Kröger
Received: 3 November 2016 / Revised: 10 December 2016 / Accepted: 12 December 2016 / Published: 16 December 2016
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Abstract

Mixed polymer brush-grafted nanochannels—where two distinct species of polymers are alternately grafted on the inner surface of nanochannels—are an interesting class of nanostructured hybrid materials. By using a coarse-grained molecular dynamics simulation method, we are able to simulate the electrokinetic transport dynamics of the fluid in such nanochannels as well as the conformational behaviors of the mixed polymer brush. We find that (1) the brush adopts vertically-layered and longitudinally-separated structures due to the coupling of electroosmotic flow (EOF) and applied electric field; (2) the solvent quality affects the brush conformations and the transport properties of the EOF; (3) the EOF flux non-monotonically depends on the grafting density, although the EOF velocity in the central region of the channel monotonically depends on the grafting density. View Full-Text
Keywords: electroosmotic flow; polymer brush; molecular dynamics; dissipative particle dynamics electroosmotic flow; polymer brush; molecular dynamics; dissipative particle dynamics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Cao, Q.; You, H. Electroosmotic Flow in Mixed Polymer Brush-Grafted Nanochannels. Polymers 2016, 8, 438.

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