Vortex of electrons could handle one atom at a time

时间:2019-03-06 02:20:08166网络整理admin

SET a beam of electrons twisting, and the resulting vortex could be just the tool to manipulate atoms. Jo Verbeeck from the University of Antwerp, Belgium, and colleagues set out to make such a beam using platinum foil bearing a specific pattern of holes. This “mask” partially blocks a beam of electrons shone at it, though those that get through corkscrew into a vortex between 1 and 100 nanometres in diameter (Nature, DOI: 10.1038/nature09366). “This is a fundamentally new state that we can bring electrons into,” says Verbeeck. The vortex could be shrunk further with a redesigned mask,