Evolution of band structure in gold clusters as studied by photoemission

Photoemission studies of gold clusters with variable photon energies, $16\ensuremath{\le}h\ensuremath{\nu}\ensuremath{\le}25$ eV and $h\ensuremath{\nu}=1486.6$ eV, are used to follow the evolution of band structure with cluster size. We clearly show that a minimum size in excess of 100 atoms is required to observe any of the spectral modulation effects characteristic of the bulk metal.