1 August 2008
Scientists from Germany, Canada and The Netherlands have studied tiny gold nanoparticles, so-called clusters, and found them to have fascinating arrangements of their constituent atoms. For example, twenty gold atoms form a tetrahedron, a sort of pyramid. The nineteen-atom cluster is a truncated pyramid, which can be formed by cutting off one corner atom from the twenty-atom gold pyramid. The structures have been identified using the Free Electron Laser for Infrared eXperiments FELIX at the FOM-Institute for Plasma Physics Rijnhuizen in Nieuwegein. Detailed knowledge about the geometries of such nanoparticles can lead to a better understanding of the unexpected catalytic activity of very small gold particles. The researchers published their results in Science on 1 August 2008.