Casimir quantum levitation tuned by means of material properties and geometries
2014 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 89, no 20, 201407- p.Article in journal (Refereed) Published
The Casimir force between two surfaces is attractive in most cases. Although stable suspension of nano-objects has been achieved, the sophisticated geometries make them difficult to be merged with well-established thin film processes. We find that by introducing thin film surface coating on porous substrates, a repulsive to attractive force transition is achieved when the separations are increased in planar geometries, resulting in a stable suspension of two surfaces near the force transition separation. Both the magnitude of the force and the transition distance can be flexibly tailored though modifying the properties of the considered materials, that is, thin film thickness, doping concentration, and porosity. This stable suspension can be used to design new nanodevices with ultralow friction. Moreover, it might be convenient to merge this thin film coating approach with micro- and nanofabrication processes in the future.
Place, publisher, year, edition, pages
2014. Vol. 89, no 20, 201407- p.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-147426DOI: 10.1103/PhysRevB.89.201407ISI: 000336754300002ScopusID: 2-s2.0-84901441427OAI: oai:DiVA.org:kth-147426DiVA: diva2:731008
FunderSwedish Research Council, C0485101
QC 201406302014-06-302014-06-272015-04-23Bibliographically approved