Roland Piquepaille writes "There is not a single day without some breakthrough in nanotechnology. This one comes from Purdue University and says that faster computer memories and higher density data storage could come from affordable self-assembled 'nanorings' made from cobalt. "The cobalt nanoparticles link up when they are brought close together. Normally you might expect these to form chains, but under the right conditions, the particles will assemble into rings instead," said Purdue chemist Alexander Wei. He also thinks this is a promising development towards nonvolatile memories, even if it not for tomorrow. This overview contains more details and references."