Researchers harness mysterious Casimir force for tiny devices
(PHYSorg.com Physics)

Getting something from nothing sounds like a good deal, so for years scientists have been trying to exploit the tiny amount of energy that arises when objects are brought very close together. It`s a source of energy so obscure it was once derided as a fanciful source of `perpetual motion.` Now, a research team including Princeton scientists has found a way to harness a mysterious force of repulsion, which is one aspect of that force.