The catalytic properties of gold nanoparticles are determined by their electronic and geometric structures. We revealed the geometries of several small neutral gold clusters in the gas phase by using vibrational spectroscopy between 47 and 220 wavenumbers. A two-dimensional structure for neutral Au7 and a pyramidal structure for neutral Au20 can be unambiguously assigned. The reduction of the symmetry when a corner atom is cut from the tetrahedral Au20 cluster is directly reflected in the vibrational spectrum of Au19.
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Department of Chemistry, Imperial College, London, SW7 2AZ, UK.
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Institute of Theoretical Chemistry, University of Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany.
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Science
August 2008
Fritz-Haber-Institut der Max-Planck-Gesellschaft, 14195 Berlin, Germany.
The catalytic properties of gold nanoparticles are determined by their electronic and geometric structures. We revealed the geometries of several small neutral gold clusters in the gas phase by using vibrational spectroscopy between 47 and 220 wavenumbers. A two-dimensional structure for neutral Au7 and a pyramidal structure for neutral Au20 can be unambiguously assigned.
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