Drag coefficient of a raftlike domain embedded in a fluid membrane being a near-critical binary mixture

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10 Citations (Scopus)

Abstract

We consider a circular liquid domain in a flat fluid membrane surrounded by three-dimensional fluids, and assume that the membrane outside the domain is a two-dimensional near-critical binary fluid mixture. The membrane viscosity outside the domain is assumed to be uniform, irrespective of the local composition, and to be the same as that of the domain. Using the Gaussian free-energy functional, we show that the drag coefficient of the domain can be decreased by the preferential attraction between the domain and a component of the mixture, unlike that of a rigid sphere in a three-dimensional near-critical binary fluid mixture studied recently.

Original languageEnglish
Article number124601
JournalJournal of the Physical Society of Japan
Volume82
Issue number12
DOIs
Publication statusPublished - 2013 Dec

Fingerprint

drag coefficients
binary mixtures
membranes
fluids
binary fluids
attraction
free energy
viscosity
liquids

Keywords

  • Biomembrane
  • Diffusion coefficient
  • Lipid raft
  • Lipid-bilayer membrane
  • Model H
  • Wetting

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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abstract = "We consider a circular liquid domain in a flat fluid membrane surrounded by three-dimensional fluids, and assume that the membrane outside the domain is a two-dimensional near-critical binary fluid mixture. The membrane viscosity outside the domain is assumed to be uniform, irrespective of the local composition, and to be the same as that of the domain. Using the Gaussian free-energy functional, we show that the drag coefficient of the domain can be decreased by the preferential attraction between the domain and a component of the mixture, unlike that of a rigid sphere in a three-dimensional near-critical binary fluid mixture studied recently.",
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AB - We consider a circular liquid domain in a flat fluid membrane surrounded by three-dimensional fluids, and assume that the membrane outside the domain is a two-dimensional near-critical binary fluid mixture. The membrane viscosity outside the domain is assumed to be uniform, irrespective of the local composition, and to be the same as that of the domain. Using the Gaussian free-energy functional, we show that the drag coefficient of the domain can be decreased by the preferential attraction between the domain and a component of the mixture, unlike that of a rigid sphere in a three-dimensional near-critical binary fluid mixture studied recently.

KW - Biomembrane

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KW - Lipid raft

KW - Lipid-bilayer membrane

KW - Model H

KW - Wetting

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