On Wikipedia we ca read "Further research has shown that, with materials of certain permittivity<http://en.wikipedia.org/wiki/Permittivity>and permeability <http://en.wikipedia.org/wiki/Permeability>, or with a certain configuration, the Casimir effect could be made repulsive instead of attractive, although there are no experimental demonstrations of these predictions." from URL http://en.wikipedia.org/wiki/Casimir_effect
Can anyone tell what this research is? Isn't Teflon a good example? David
