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Title: Nanoscale structure of the oil-water interface

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. As a result, the XR and MD derived depletions are much smaller than reported for the interface between solid-supported hydrophobic monolayers and water.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [7]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Oxford Univ., Oxford (United Kingdom)
  3. Free Univ. Berlin, Berlin (Germany)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. ESRF - The European Synchrotron, Grenoble (France)
  6. Argonne National Lab. (ANL), Lemont, IL (United States)
  7. Bar-Ilan Univ., Ramat-Gan (Israel)
Publication Date:
Report Number(s):
BNL-112004-2016-JA
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1701140
Grant/Contract Number:
SC00112704; SC0012704; AC02-06CH11357; AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 25; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS) (SC-27)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; force; hydrophobicity; length scales; liquid surfaces; potentials; resolution; x-ray reflectivity
OSTI Identifier:
1340344
Alternate Identifier(s):
OSTI ID: 1336883; OSTI ID: 1361070; OSTI ID: 1371549