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Ultrathin Metallic Coatings Can Induce Quantum Levitation between Nanosurfaces

Boström, Mathias; Ninham, Barry W.; Brevik, Iver; Persson, Clas; Parsons, Drew F.; Sernelius, Bo E.


There is an attractive Casimir-Lifshitz force between two silica surfaces in a liquid (bromobenze or toluene). We demonstrate that adding an ultrathin (5-50{\AA}) metallic nanocoating to one of the surfaces results in repulsive Casimir-Lifshitz forces above a critical separation. The onset of such quantum levitation comes at decreasing separations as the film thickness decreases. Remarkably the effect of retardation can turn attraction into repulsion. From that we explain how an ultrathin...[Show more]

CollectionsANU Research Publications
Date published: 2012-06-19
Type: Journal article
Source: Applied Physics Letters
DOI: 10.1063/1.4729822


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