Volume 60, Number 5, December 2002
|Page(s)||795 - 801|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 November 2002|
Fluctuations of a membrane interacting with a diffusion field
Groupe de Recherche sur les Phénomènes
Hors-Equilibre, LSP Université Joseph Fourier et CNRS,
Grenoble I BP 87, Saint-Martin d'Hères, 38402 Cedex, France
2 GMCM, UMR CNRS 6626 Campus de Beaulieu - 35042 Rennes Cedex, France
3 CEA, DSM/DRFMC - 17 av. des Martyrs, 38054 Grenoble Cedex 9, France
Accepted: 12 September 2002
We analyze the dynamics and fluctuations of a phospholipidic membrane containing inclusions which may diffuse along the membrane as well as in the aqueous solution. A kinetic law of exchange between the membrane and the fluid is introduced. It is shown that the membrane may become morphologically unstable. In the stable regime the fluctuations kinetics are analyzed. Diffusion as well as desorption lead to dynamical laws for the fluctuation width which assumes different scaling laws with time (e.g., , ) depending on the prevailing dissipation mechanism. The experimental analysis of dynamical fluctuations should give access to the microscopic physical parameters.
PACS: 87.15.Kg – Molecular interactions; membrane-protein interactions / 87.16.Ac – Theory and modeling; computer simulation / 87.16.Dg – Membranes, bilayers, and vesicles
© EDP Sciences, 2002
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