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Fluctuation-magnification of non-equilibrium membranes near a wall

  • J. Prost
  • J.-B. Manneville
  • R. Bruinsma
Article

Abstract:

Membranes in thermal equilibrium are well known to exhibit Brownian motion type shape fluctuations. Membranes containing active force centers -- such as chemically active membrane proteins -- suffer additional non-equilibrium shape fluctuations due to the activity of these force centers. We demonstrate, using scaling arguments, that non-equilibrium shape fluctuations are in general greatly amplified by the presence of a nearby wall or membrane due to the absence of a fluctuation-dissipation theorem. For adhesive membranes, this fluctuation magnification effect may facilitate the establishment of bonding. For non-adhesive membranes, fluctuation magnification produces a long-range repulsive pressure which can exceed the well known Helfrich repulsion due to purely thermal fluctuations.

PACS. 87.22.Bt Membrane and subcellular physics and structure - 82.65.Dp Thermodynamics of surfaces and interfaces 

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Copyright information

© EDP Sciences, Springer-Verlag 1998

Authors and Affiliations

  • J. Prost
    • 1
  • J.-B. Manneville
    • 1
  • R. Bruinsma
    • 2
  1. 1.“Physico-Chimie Curie”Paris Cedex 05France
  2. 2.Department of PhysicsUniversity of CaliforniaLos AngelesUSA

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