A maglev construction kit

摘要

By exploiting a magnetic levitational effect, researchers have come up with a way to assemble small parts in three dimensions. The system devised by George Whitesides at Harvard University in Cambridge, Massachusetts, and his colleagues consists of neodymium iron boride magnets placed above and below a container filled with a fluid that is weakly magnetic when in a magnetic field. Suspended in the liquid are millimetre-sized objects.