Ultraviolet photoelectron spectroscopy of Nb4- to Nb200-
Fakultät für Physik, Universität Freiburg,
H. Herderstr. 3, 79104 Freiburg, Germany
Corresponding author: a email@example.com
Published online: 3 July 2003
We present UV ( eV) photoelectron spectra of niobium cluster anions Nb in the size range from n=4 to n=200. The spectra exhibit a variety of patterns, which can be related to the geometrical structures of the clusters. The charging energies of the larger clusters are in very good agreement with the metallic sphere model. Nevertheless a strong size dependence of the work function is observed, which underlines the special properties of this transition metal.
PACS: 33.60.Cv – Ultraviolet and vacuum ultraviolet photoelectron spectra / 36.40.Cg – Electronic and magnetic properties of clusters / 73.22.-f – Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003