Repulsion between inorganic particles inserted within surfactant bilayers

  • Constantin D
  • Pansu B
  • Impéror M
 et al. 
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We study by synchrotron small-angle X-ray scattering highly aligned lamellar phases of a zwitterionic surfac- tant, doped with monodisperse and spherical hydrophobic inorganic particles as a function of particle concen- tration. Analysis of the structure factor of the two-dimensional fluid formed by the particles in the plane of the bilayer gives access to their membrane-mediated interaction, which is repulsive, with a contact value of about 4 kBT and a range of 14 A .Systematic application of this technique should lead to a better understanding of the interaction between membrane inclusions.

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