Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Ultrathin metallic coatings can induce quantum levitation between nanosurfaces

Boström, M., Ninham, B.W., Brevik, I., Persson, C., Parsons, D.F.ORCID: 0000-0002-3956-6031 and Sernelius, B.E. (2012) Ultrathin metallic coatings can induce quantum levitation between nanosurfaces. Applied Physics Letters, 100 (25). Article 253104.

PDF - Published Version
Download (914kB)
Link to Published Version:
*Subscription may be required


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 Å) 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 metallic coating may prevent nanoelectromechanical systems from crashing together.

Item Type: Journal Article
Publisher: American Institute of Physics
Copyright: © 2012 American Institute of Physics.
Item Control Page Item Control Page


Downloads per month over past year