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

doi:10.1103/PhysRevLett.117.256102

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

Department of Physics

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21 Scopus citations

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.

Original language	English
Article number	256102
Pages (from-to)	256102
Journal	Physical Review Letters
Volume	117
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.117.256102
State	Published - 16 Dec 2016

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© 2016 American Physical Society.

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10.1103/PhysRevLett.117.256102

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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-{\AA} 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.",

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AU - Ocko, B. M.

AU - Bonthuis, D. J.

AU - Netz, R. R.

AU - Steinrück, H. G.

AU - Pontoni, D.

AU - Kuzmenko, I.

AU - Haddad, J.

AU - Deutsch, M.

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Nanoscale Structure of the Oil-Water Interface

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