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Sign of the Casimir-Polder interaction between atoms and oil-water interfaces: Subtle dependence on dielectric properties
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, The Institute of Technology.
Norwegian University of Science and Technology, Norway .
Norwegian University of Science and Technology, Norway .
Australian National University, Australia .
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2012 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 85, no 6, 064501- p.Article in journal (Refereed) Published
Abstract [en]

We demonstrate that Casimir-Polder energies between noble gas atoms (dissolved in water) and oil-water interfaces are highly surface specific. Both repulsion (e.g., hexane) and attraction (e.g., glycerine and cyclodecane) is found with different oils. For several intermediate oils (e.g., hexadecane, decane, and cyclohexane) both attraction and repulsion can be found in the same system. Near these oil-water interfaces the interaction is repulsive in the nonretarded limit and turns attractive at larger distances as retardation becomes important. These highly surface specific interactions may have a role to play in biological systems where the surface may be more or less accessible to dissolved atoms.

Place, publisher, year, edition, pages
American Physical Society , 2012. Vol. 85, no 6, 064501- p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-79797DOI: 10.1103/PhysRevA.85.064501ISI: 000305250200002OAI: oai:DiVA.org:liu-79797DiVA: diva2:544986
Available from: 2012-08-17 Created: 2012-08-14 Last updated: 2017-12-07

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