The interaction of hybrid nanoparticles inserted within surfactant bilayers.
We determine by small-angle x-ray scattering the structure factor of hydrophobic particles inserted within lamellar surfactant phases for various particle concentrations. The data are then analyzed by numerically solving the Ornstein-Zernicke equation, taking into account both the intra- and interlayer interactions. We find that particles within the same layer repel each other and that the interaction potential (taken as independent of the concentration) has a contact value of 2.2k(B)T and a range of about 10 Å. If the amplitude is allowed to decrease with increasing concentration, the contact value in the dilute limit is about 5k(B)T for a similar range.
Constantin
Doru
D
Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, UMR 8502, 91405 Orsay, France. constantin@lps.u-psud.fr
D002678:Chimera / Q000378:metabolism; D008051:Lipid Bilayers / Q000737:chemistry* / Q000528:radiation effects; D053758:Nanoparticles / Q000737:chemistry*; D012996:Solutions; D013501:Surface-Active Agents / Q000737:chemistry*; D014961:X-Ray Diffraction / Q000379:methods*; D014965:X-Rays
D008051:Lipid Bilayers; D012996:Solutions; D013501:Surface-Active Agents