Rigid and Fluctuating Surfaces: A Series of Synchrotron X-ray Scattering Studies of Interacting Stacked Membranes

  • C. R. Safinya
Part of the NATO ASI Series book series (NSSB, volume 211)


In these lectures we discuss fluctuation phenomena encountered in interacting multilayered fluid membranes using synchrotron x-ray scattering as the primary tool. We consider very dilute Lα phases with inter-layer separations as large as ≈600 Å. While most Lα phases consist of flat membranes with large bending rigidity kc ≫ kBT, with their interlayer interactions determined by detailed microscopic interactions such as hydration and van der Waals, the stability of these phases is due to an effectively long-range interaction arising from the mutual hinderance of fluctuating membranes with a very small rigidity kc ≈ kBT. This regime, which because of its entropic origin exhibits universality, can be accessed from the microscopic regime by thinning and thus lowering the modulus kc of an initially rigid membrane.


Water Dilution Flexible Membrane Interlayer Interaction Rigid Membrane Hydration Force 
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • C. R. Safinya
    • 1
  1. 1.Exxon Research and Engineering CompanyAnnandaleUSA

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