Phase separation on bicontinuous cubic membranes: symmetry breaking, reentrant, and domain faceting

Paillusson, Fabien and Pennington, Matthew R. and Kusmaatmaja, Halim (2016) Phase separation on bicontinuous cubic membranes: symmetry breaking, reentrant, and domain faceting. Physical Review Letters, 117 . 058101. ISSN 0031-9007

Full content URL: http://journals.aps.org/prl/abstract/10.1103/PhysR...

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Phase Separation on Bicontinuous Cubic Membranes: Symmetry Breaking, Reentrant, and Domain Faceting
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Abstract

We study the phase separation of binary lipid mixtures that form bicontinuous cubic phases. The
competition between the nonuniform Gaussian membrane curvature and line tension leads to a very rich
phase diagram, where we observe symmetry breaking of the membrane morphologies and reentrant
phenomena due to the formation of bridges between segregated domains. Upon increasing the line tension
contribution, we also find faceting of lipid domains that we explain using a simple argument based on the
symmetry of the underlying surface and topology.

Keywords:Mixtures, Membrane, Lipids, Patterning, JCOpen
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F340 Mathematical & Theoretical Physics
F Physical Sciences > F343 Computational Physics
Divisions:College of Science > School of Mathematics and Physics
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ID Code:23729
Deposited On:15 Aug 2016 14:09

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