O2 photodesorption from AuO2- and Au2O2-

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2009
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Koyasu, Kiichirou
Westhäuser, Wilko
Niemietz, Marco
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Using time-resolved photoelectron spectroscopy, the decay channels of AuO2− and Au2O2− following photoexcitation with 3.1-eV photons have been studied. For AuO2−, a state with a rather long lifetime of 30 ps has been identified. Its decay path could not be determined but photodesorption can be excluded. For Au2O2−, the spectra indicate O2 desorption after 3.1-eV photoexcitation on a time scale of 1 ps. While comparing these results on Au n O2− with analogous data on Ag n O2− clusters, a discernible pattern emerges: for dissociatively bound O2(AuO2−, Ag3O2−), there are long-living excited states which do not decay by oxygen desorption, while for molecular chemisorption (Au2O2−, Ag2O2−, Ag4O2−, Ag8O2−), the 3.1-eV photoexcitation triggers fast O2 desorption with a high quantum yield.

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ISO 690KOYASU, Kiichirou, Wilko WESTHÄUSER, Marco NIEMIETZ, Jan HEINEN, Gerd GANTEFÖR, 2009. O2 photodesorption from AuO2- and Au2O2-. In: Applied Physics / A. 2009, 96(3), pp. 679-684. Available under: doi: 10.1007/s00339-009-5264-5
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@article{Koyasu2009photo-9403,
  year={2009},
  doi={10.1007/s00339-009-5264-5},
  title={O2 photodesorption from AuO2- and Au2O2-},
  number={3},
  volume={96},
  journal={Applied Physics / A},
  pages={679--684},
  author={Koyasu, Kiichirou and Westhäuser, Wilko and Niemietz, Marco and Heinen, Jan and Ganteför, Gerd}
}
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