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Optical plasmon losses in stabilized Au55 clusters

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Zeitschrift für Physik D Atoms, Molecules and Clusters

Abstract

Au55 cluster compounds are investigated by optical spectroscopy and TEM. The optical spectra appear to be rather structureless, neither showing a collective excitation resonance nor exhibiting distinct absorption bands known from lower nuclearity clusters. We discuss changes of the electronic properties compared to larger Au clusters affecting both, 6sp electrons and5d-6sp interband transitions, the cluster-ligand-interaction being considered as a charge transfer process.

We additionally report on a low temperature instability of the cluster compound, which results in changed optical extinction spectra. A characteristic absorption feature at λ=400 nm is attributed to small, ligand-free Au cluster fragments.

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Authors and Affiliations

  1. Universität des Saarlandes, FB 10-Physik, W-6600, Saarbrücken, Federal Republic of Germany

    K. Fauth & U. Kreibig

  2. Universität Essen, Institut für Anorganische Chemie, W-4300, Essen, Federal Republic of Germany

    G. Schmid

Authors
  1. K. Fauth
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  2. U. Kreibig
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  3. G. Schmid
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Fauth, K., Kreibig, U. & Schmid, G. Optical plasmon losses in stabilized Au55 clusters. Z Phys D - Atoms, Molecules and Clusters 20, 297–300 (1991). https://doi.org/10.1007/BF01543995

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  • DOI: https://doi.org/10.1007/BF01543995

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