title: Structure and depletion at fluorocarbon and hydrocarbon/water liquid/liquid interfaces.
abstract: The results of x-ray reflectivity studies of two oil/water (liquid/liquid) interfaces are inconsistent with recent predictions of the presence of a vaporlike depletion region at hydrophobic/aqueous interfaces. One of the oils, perfluorohexane, is a fluorocarbon whose superhydrophobic interface with water provides a stringent test for the presence of a depletion layer. The other oil, heptane, is a hydrocarbon and, therefore, is more relevant to the study of biomolecular hydrophobicity. These results are consistent with the subangstrom proximity of water to soft hydrophobic materials.
authors.affiliation: Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, USA.
authors.forename: Kaoru
authors.initials: K
authors.lastname: Kashimoto
authors.forename: Jaesung
authors.initials: J
authors.lastname: Yoon
authors.forename: Binyang
authors.initials: B
authors.lastname: Hou
authors.forename: Chiu-hao
authors.initials: CH
authors.lastname: Chen
authors.forename: Binhua
authors.initials: B
authors.lastname: Lin
authors.forename: Makoto
authors.initials: M
authors.lastname: Aratono
authors.forename: Takanori
authors.initials: T
authors.lastname: Takiue
authors.forename: Mark L
authors.initials: ML
authors.lastname: Schlossman