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Issue 41, 2013

Mechanical properties and microdomain separation of fluid membranes with anchored polymers

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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.

Graphical abstract: Mechanical properties and microdomain separation of fluid membranes with anchored polymers

Article information


Submitted
18 Jun 2013
Accepted
22 Aug 2013
First published
23 Aug 2013

This article is Open Access

Soft Matter, 2013,9, 9907-9917
Article type
Paper

Mechanical properties and microdomain separation of fluid membranes with anchored polymers

H. Wu, H. Shiba and H. Noguchi, Soft Matter, 2013, 9, 9907 DOI: 10.1039/C3SM51680F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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