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Dynamics of O2 photodesorption from metal clusters : a significant difference from bulk behaviour

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chemphyslett438.pdf
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2007

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Niemietz, Marco
Koyasu, Kiichirou
Kim, Young Dok

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-85983
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https://doi.org/10.1016/j.cplett.2007.03.016
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Chemical Physics Letters. 2007, 438(4-6), pp. 263-267. Available under: doi: 10.1016/j.cplett.2007.03.016

Zusammenfassung

Photodesorption of O2 from size-selected AgnO-2 cluster anions with n = 2, 3, 4 and 8 was studied using time-resolved photoelectron spectroscopy (TR-PES). The spectra indicate that relaxations of photo-excited AgnO-2 clusters with n = even numbers accompany ultrafast direct O2 photodesorption. For the odd-numbered cluster Ag3O-2, in contrast, a long-lived excited state is observed, since O2 might be dissociatively chemisorbed, suppressing direct photodesorption of oxygen. Both, direct desorption and long-lived excited states, have not been observed from adsorbate covered metal surfaces, suggesting unique photochemical properties of such small clusters.

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530 Physik

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ISO 690NIEMIETZ, Marco, Kiichirou KOYASU, Gerd GANTEFÖR, Young Dok KIM, 2007. Dynamics of O2 photodesorption from metal clusters : a significant difference from bulk behaviour. In: Chemical Physics Letters. 2007, 438(4-6), pp. 263-267. Available under: doi: 10.1016/j.cplett.2007.03.016
BibTex
@article{Niemietz2007Dynam-5292,
  year={2007},
  doi={10.1016/j.cplett.2007.03.016},
  title={Dynamics of O2 photodesorption from metal clusters : a significant difference from bulk behaviour},
  number={4-6},
  volume={438},
  journal={Chemical Physics Letters},
  pages={263--267},
  author={Niemietz, Marco and Koyasu, Kiichirou and Ganteför, Gerd and Kim, Young Dok}
}
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