fluorocarbonophilic?

[Eugene Leitl <eugene.leitl-: at :-lrz.uni-muenchen.de>]

 While working with florocarbon surfactant-stabilized perflorocarbon
 emulsions I noticed a perculiar affinity of perfluorinated compounds
 to themselves, and nothing else. In a sense, one could see them to
 define another axis in addition to hydrophobic-hydrophilic.
 What is the origin of this specific interaction? Dipole-dipole,
 entropic (residue packing)? Does the phenomenon also appear in
 molecular dynamics simulations of, say, ternary (water, lipid,
 perfluorocarbon) systems?
 Intrigued,
 -- Eugene Leitl