The electronic structure of free aluminum clusters: Metallicity and plasmons

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The electronic structure of free aluminum clusters with similar to 3-4 nm radius has been investigated using synchrotron radiation-based photoelectron and Auger electron spectroscopy. A beam of free clusters has been produced using a gas-aggregation source. The 2p core level and the valence band have been probed. Photoelectron energy-loss features corresponding to both bulk and surface plasmon excitation following photoionization of the 2p level have been observed, and the excitation energies have been derived. In contrast to some expectations, the loss features have been detected at energies very close to those of the macroscopic solid. The results are discussed from the point of view of metallic properties in nanoparticles with a finite number of constituent atoms. (C) 2012 American Institute of Physics. []


  • Tomas Andersson
  • Chaofan Zhang
  • Maxim Tchaplyguine
  • Svante Svensson
  • Nils Martensson
  • Olle Bjorneholm
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Natural Sciences
  • Physical Sciences
Original languageEnglish
JournalJournal of Chemical Physics
Issue number20
Publication statusPublished - 2012
Publication categoryResearch