DEAN, David S.; PARSEGIAN, V. Adrian; PODGORNIK, Rudolf

doi:10.1088/0953-8984/27/21/214004

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DEAN, David S.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

PARSEGIAN, V. Adrian
Department of Physics

PODGORNIK, Rudolf
Department of Physics
Department of Theoretical Physics
Department of Physics, Faculty of Mathematics and Physics

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Journal of Physics: Condensed Matter. 2015-06-03, vol. 27, n° 21, p. 214004 (1-10)

IOP Publishing

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We consider how membrane fluctuations can modify the miscibility of lipid mixtures, that is to say how the phase diagram of a boundary-constrained membrane is modified when the membrane is allowed to fluctuate freely in the case of zero surface tension. In order for fluctuations to have an effect, the different lipid types must have differing Gaussian rigidities. We show, somewhat paradoxically, that fluctuation-induced interactions can be treated approximately in a mean-field type theory. Our calculations predict that, depending on the difference in bending and Gaussian rigidity of the lipids, membrane fluctuations can either favor or disfavor mixing.< Leer menos

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Fluctuation forces

Lipids

Mixing-demixing transition

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Fluctuation mediated interactions due to rigidity mismatch and their effect on miscibility of lipid mixtures in multicomponent membranes

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