Fluid lipid bilayers: Intermonolayer coupling and its thermodynamic manifestations

Per Lyngs Hansen, Ling Miao, John Hjorth Ipsen

    Research output: Contribution to journalJournal articleResearchpeer-review

    275 Downloads (Pure)

    Abstract

    A fluid membrane of lipid bilayer consists of two individual molecular monolayers physically opposed to each other. This unique molecular architecture naturally necessitates the need to treat a lipid-bilayer membrane as one entity of two coupled two-dimensional systems (monolayers), each of which possesses "in-plane" degrees of freedom that characterize its physical or chemical state. Thermally excitable deformations of a Lipid bilayer in its geometrical conformation further impart to it ''out-of-plane'' degrees of freedom. In this paper we discuss the issue of intermonolayer coupling in terms of a phenomenological model that describes the necessary types of degrees of freedom and their interplay, which reflects different modes of intermonolayer coupling. Furthermore, we investigate! based on the phenomenological model, the manifestations of the intermonolayer coupling both in the lateral ordering processes of the "in-plane" degrees of freedom and in the conformational behavior of the bilayer membrane.
    Original languageEnglish
    JournalPhysical Review E. Statistical, Nonlinear, and Soft Matter Physics
    Volume58
    Issue number2
    Pages (from-to)2311-2324
    ISSN1063-651X
    DOIs
    Publication statusPublished - 1998

    Bibliographical note

    Copyright (1998) by the American Physical Society.

    Keywords

    • CHAIN-LENGTH
    • PHOSPHOLIPID-BILAYERS
    • BENDING ELASTICITY
    • SEGREGATION LIMIT
    • VESICLES
    • RIPPLE PHASE
    • TENSION
    • 2-COMPONENT MEMBRANES
    • CURVATURE ELASTICITY
    • PHOSPHATIDYLCHOLINE-CHOLESTEROL SYSTEM

    Cite this