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Casimir-Lifshitz interaction between ZnO and SiO2 nanorods in bromobenzene turns repulsive at intermediate separations due to retardation effects
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.ORCID iD: 0000-0002-9050-5445
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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 4, 044702- p.Article in journal (Refereed) Published
Abstract [en]

We consider the interaction between a ZnO nanorod and a SiO2 nanorod in bromobenzene. Using optical data for the interacting objects and ambient we calculate the force (from short-range attractive van der Waals force to intermediate-range repulsive Casimir-Lifshitz force to long-range entropically driven attraction). The nonretarded van der Waals interaction is attractive at all separations. We demonstrate a retardation-driven repulsion at intermediate separations. At short separations (in the nonretarded limit) and at large separations (in the classical limit) the interaction is attractive. These effects can be understood from an analysis of multiple crossings of the dielectric functions of the three media as functions of imaginary frequencies.

Place, publisher, year, edition, pages
2012. Vol. 85, no 4, 044702- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-94043DOI: 10.1103/PhysRevA.85.044702ISI: 000302602500012Scopus ID: 2-s2.0-84859797432OAI: oai:DiVA.org:kth-94043DiVA: diva2:525243
Funder
Swedish Research Council, 70529001
Note
QC 20120507Available from: 2012-05-07 Created: 2012-05-07 Last updated: 2017-12-07Bibliographically approved

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