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Author(s):
Del Vitto, Annalisa; Pacchioni, Gianfranco; Lim, Kok Hwa; Roesch, Notker; Antonietti, Jean-Marie; Michalski, Marcin; Heiz, Ulrich; Jones, Harold 
Title:
Gold Atoms and Dimers on Amorphous SiO2: Calculation of Optical Properties and Cavity Ringdown Spectroscopy Measurements 
Abstract:
The authors report on the optical absorption spectra of Au atoms and dimers deposited on amorphous SiO2 in size-selected fashion. Exptl. spectra were obtained by cavity ringdown spectroscopy. Issues on soft-landing, fragmentation, and thermal diffusion are discussed from the exptl. results. In parallel, cluster and periodic supercell d. functional theory (DFT) calcns. were performed to model atoms and dimers trapped on various defect sites of amorphous SiO2. Optically allowed electronic transiti...    »
 
Keywords:
Bond (dangling, for silicon gold atoms and dimers on amorphous SiO2: calcn. of optical properties and cavity ringdown spectroscopy measurements) Cluster model Electronic transition Energy level excitation Fragmentation reaction Optical properties UV and visible spectra (gold atoms and dimers on amorphous SiO2: calcn. of optical properties and cavity ringdown spectroscopy measurements) Trapping (silanolate centers for gold atoms and dimers on amorphous SiO2: calcn. of optical properties and cavit...    »
 
Congress title:
CAN 143:484645 73-2 Optical, Electron, and Mass Spectroscopy and Other Related Properties Dipartimento di Scienza dei Materiali, Universita di Milano-Bicocca, Milan, Italy. Journal 1520-6106 7440-57-5 (Gold); 12187-09-6 (Gold dimer) Role: PRP (Properties) (gold atoms and dimers on amorphous SiO2: calcn. of optical properties and cavity ringdown spectroscopy measurements); 7631-86-9 (Silica) Role: NUU (Other use, unclassified), USES (Uses) (substrate; gold atoms and dimers on amorphous SiO2: c...    »
 
Journal title:
J. Phys. Chem. B 
Year:
2005 
Journal volume:
109 
Journal issue:
42 
Pages contribution:
19876-19884