The electronic states of copper clusters pulsed laser deposited on varioussubstrates

The electronic structure of pulsed laser deposited copper clusters on vario us substrates is investigated in situ by X-ray photoelectron spectroscopy, X-ray induced Auger electron spectroscopy and Rutherford backscattering spe ctroscopy. The initial and final state contributions to Cu core-electron bi nding energy shifts, as obtained by an Auger-parameter analysis, and their relation with Cu cluster size are discussed. Physical model describing the observed effects is proposed.