| Metal clusters have been studied in numerous experiments and theoretical investigations. Well understanding the properties of metal clusters needs to know further about the molecular chemistry and solid state physics. New experimental techniques as well as constantly improved theoretical calculations have been employed to determine the bonding energies, vibrational structures, dissociation energies, etc. Matrix isolation (MI) technique combined with mass-select system enables metal clusters to be a good spectral carrier which contains a monodispersed. single-sized clusters. Using “Wien Filter”, a velocity selector, metal cluster cations are mass-selected and then co-deposited with excess rare gas on a cold window in the presence of low energy electrons. Neutralized cluster samples are interrogated by absorption, excitation, fluorescence and Raman spectroscopy. Vibrational frequency determined by Raman spectra provide an relatively accurate result of molecular information. Raman spectra of Hafnium trimer, yttrium, dimer and lanthanum dimer, luminescence spectra of platinum dimer have been discussed. |
