Electroosmotic flow in mixed polymer brush-grafted nanochannels

Qianqian Cao, Hao You

Research output: Contribution to journalArticle

9 Citations (Scopus)

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.

Original languageEnglish (US)
Article number438
JournalPolymers
Volume8
Issue number12
DOIs
StatePublished - Jan 1 2016

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Brushes
Polymers
Hybrid materials
Nanostructured materials
Flow velocity
Transport properties
Conformations
Molecular dynamics
Electric fields
Fluxes
Fluids
Computer simulation

Keywords

  • Dissipative particle dynamics
  • Electroosmotic flow
  • Molecular dynamics
  • Polymer brush

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics

Cite this

Electroosmotic flow in mixed polymer brush-grafted nanochannels. / Cao, Qianqian; You, Hao.

In: Polymers, Vol. 8, No. 12, 438, 01.01.2016.

Research output: Contribution to journalArticle

Cao, Qianqian ; You, Hao. / Electroosmotic flow in mixed polymer brush-grafted nanochannels. In: Polymers. 2016 ; Vol. 8, No. 12.
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