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Single Gold Atoms Altered
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“Scientists from IBM’s Zürich Research Laboratory and Chalmers University of Technology in Sweden have found a way to alter a single atom.
…The gold atom, positioned on an ultrathin film of sodium chloride, remained stable during the operation, despite the change in charge. The gold atom was kept stable by small changes in the positions of nearby atoms in the film.
Ions have different chemical and physical properties than corresponding neutral atoms. Being able to switch an individual atom to an ion and back promises a new way to control attributes like chemical reactivity, optical properties, and magnetic properties, according to the researchers.