Mechanical properties and microdomain separation of fluid membranes with anchored polymers

Hao Wu, Hayato Shiba, Hiroshi Noguchi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The entropic effects of anchored polymers on biomembranes are studied using simulations of a meshless membrane model combined with anchored linear polymer chains. The bending rigidity and spontaneous curvature are investigated for anchored ideal and excluded-volume polymer chains. Our results are in good agreement with the previous theoretical predictions. It is found that the polymer reduces the line tension of membrane edges, as well as the interfacial line tension between membrane domains, leading to microdomain formation. Instead of the mixing of two phases as observed in typical binary fluids, densely anchored polymers stabilize small domains. A mean field theory is proposed for the edge line tension reduced by anchored ideal chains, which reproduces our simulation results well.

Original languageEnglish
Pages (from-to)9907-9917
Number of pages11
JournalSoft Matter
Volume9
Issue number41
DOIs
Publication statusPublished - 2013 Nov 7
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

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