Ultraviolet Photoelectron Spectra of Gallium Arsenide Clusters
RICE UNIV HOUSTON TX DEPT OF CHEMISTRY
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The ultraviolet photoelectron spectra UPS of mass-selected negative gallium arsenide cluster ions in the 2-50 atom size range was measured with a photon energy of 7.9 eV. The measured photodetachment thresholds displayed a strong evenodd oscillation through the largest clusters in this range, suggesting the presence of a substantial HOMO-LUMO gap in the corresponding neutral clusters which evolves to the band gap of bulk GaAs crystals. Keywords Surface chemistry Ultraviolet photoelectron spectra Gallium arsenide clusters.
- Physical Chemistry