Nanoscale Structure of the Oil-Water Interface

M. Fukuto, B. M. Ocko, D. J. Bonthuis, R. R. Netz, H.-G. Steinrück, D. Pontoni, I. Kuzmenko, J. Haddad, M. Deutsch
2016 Physical Review Letters  
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
more » ... nd the water. The XR and MD derived depletions are much smaller than reported for the interface between solid supported hydrophobic monolayers and water.
doi:10.1103/physrevlett.117.256102 pmid:28036213 fatcat:5kps3a7iz5gmfhcwlchcsw5kaa