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Demixing of homogeneous binary lipid membranes induced by protein inclusions

Nowakowski, Piotr; Stumpf, Bernd Henning; Smith, Ana-Sunčana; Maciołek, Anna (2023) Demixing of homogeneous binary lipid membranes induced by protein inclusions. Physical review E: Statistical, nonlinear, and soft matter physics, 107 (5). ISSN 2470-0045

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We study a model of a lipid bilayer membrane described by two order parameters: the chemical composition described using the Gaussian model and the spatial configuration described with the elastic deformation model of a membrane with a finite thickness or, equivalently, for an adherent membrane. We assume and explain on physical grounds the linear coupling between the two order parameters. Using the exact solution, we calculate the correlation functions and order parameter profiles. We also study the domains that form around inclusions on the membrane. We propose and compare six distinct ways to quantify the size of such domains. Despite its simplicity, the model has many interesting features like the Fisher-Widom line and two distinct critical regions.

Item Type: Article
Uncontrolled Keywords: lipid bilayer membrane ; Gaussian model ; correlation function ; critical adsorption
Subjects: NATURAL SCIENCES > Physics > Condensed Matter Physics
NATURAL SCIENCES > Physics > Biophysics and Medical Physics
Divisions: Division of Physical Chemistry
Depositing User: Ana Sunčana Smith
Date Deposited: 23 Jun 2023 10:48
DOI: 10.1103/physreve.107.054120

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