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- Titel:
Optical Absorption Spectrum of Gold Atoms Deposited on SiO2 from Cavity Ringdown Spectroscopy
- Dokumenttyp:
- Zeitschriftenaufsatz
- Autor(en):
- Antonietti, Jean-Marie; Michalski, Marcin; Heiz, Ulrich; Jones, Harold; Lim, Kok Hwa; Rosch, Notker; Del Vitto, Annalisa; Pacchioni, Gianfranco
- Abstract:
- The optical properties of gold atoms supported on amorphous silica (Α ±-SiO2) were studied exptl. and theor. in the visible range. Samples were prepd. in situ by depositing Au atoms at low coverages (5 x 1012 cm-2) in UHV, and the optical absorption spectra were recorded by cavity ringdown spectroscopy. The at. absorption bands can be attributed to gold atoms trapped at Si-O.bul. and Si-O- defect sites. The absence of optical transitions typical for Au2 shows that the atoms are efficiently anchored at these defect sites, preventing diffusion and aggregation. Furthermore, these exptl. results reveal that it is now possible to study optical properties of well-defined nanostructures at surface coverages as low as 5 x 1011 cm-2. [on SciFinder(R)]
- Stichworte:
- Laser spectroscopy (cavity ringdown optical absorption spectra of gold atoms deposited on SiO2 from cavity ringdown spectroscopy) Absorption spectra Adsorbed substances Optical transition UV and visible spectra (optical absorption spectra of gold atoms deposited on SiO2 from cavity ringdown spectroscopy) Surface defects (optical absorption spectra of gold atoms deposited on SiO2 from cavity ringdown spectroscopy indicating trapping at surface defect sites) optical absorption spectra gold atom tr... »
- Kongresstitel:
- CAN 143:181923 73-4 Optical, Electron, and Mass Spectroscopy and Other Related Properties Lehrstuhl fur Physikalische Chemie 1, Technische Universitat Munchen, Garching, Germany. Journal 0031-9007 7631-86-9 (Silica) Role: NUU (Other use, unclassified), USES (Uses) (optical absorption spectra of gold atoms deposited on SiO2 from cavity ringdown spectroscopy); 7440-57-5 (Gold); 12187-09-6 Role: PRP (Properties) (optical absorption spectra of gold atoms deposited on SiO2 from cavity ringdown spec... »
- Zeitschriftentitel:
- Phys. Rev. Lett.
- Jahr:
- 2005
- Band / Volume:
- 94
- Heft / Issue:
- 21
- Seitenangaben Beitrag:
- 213402/1-213402/4
- Volltext / DOI:
- doi:10.1103/PhysRevLett.94.213402
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