title: Nanoscale Structure of the Oil-Water Interface.
abstract: X-ray reflectivity (XR) and atomistic molecular dynamics (MD) simulations, carried out to determine the structure of the oil-water interface, provide new insight into the simplest liquid-liquid interface. For several oils (hexane, dodecane, and hexadecane) the XR shows very good agreement with a monotonic interface-normal electron density profile (EDP) broadened only by capillary waves. Similar agreement is also found for an EDP including a sub-Å thick electron depletion layer separating the oil and the water. The XR and MD derived depletions are much smaller than reported for the interface between solid-supported hydrophobic monolayers and water.
authors.affiliation: Condensed Matter Physics and Materials Sciences Department and NSLS II, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: M
authors.initials: M
authors.lastname: Fukuto
authors.affiliation: Condensed Matter Physics and Materials Sciences Department and NSLS II, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: B M
authors.initials: BM
authors.lastname: Ocko
authors.affiliation: Rudolf Peierls Centre for Theoretical Physics, Oxford University, 1 Keble Road, Oxford OX1 3NP, United Kingdom.
authors.forename: D J
authors.initials: DJ
authors.lastname: Bonthuis
authors.affiliation: Department of Physics, Free University Berlin, D-14195 Berlin, Germany.
authors.forename: R R
authors.initials: RR
authors.lastname: Netz
authors.affiliation: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
authors.forename: H-G
authors.initials: HG
authors.lastname: Steinrück
authors.affiliation: ESRF-The European Synchrotron, 71 Avenue des Martyrs, 38000 Grenoble, France.
authors.forename: D
authors.initials: D
authors.lastname: Pontoni
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: I
authors.initials: I
authors.lastname: Kuzmenko
authors.affiliation: Physics Department and Institute of Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: J
authors.initials: J
authors.lastname: Haddad
authors.affiliation: Physics Department and Institute of Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: M
authors.initials: M
authors.lastname: Deutsch