Articolo in rivista, 2016, ENG, 10.1016/j.susc.2015.07.018

Auger parameter and Wagner plot studies of small copper clusters

Moretti G.; Palma A.; Paparazzo E.; Satta M.

Dipartimento di Chimica, Sapienza Università di Roma, Piazzale A. Moro 5, Roma, 00185, Italy; Istituto per Lo Studio Dei Materiali Nanostrutturati (ISMN) Del CNR, C/o Dipartimento di Chimica, Sapienza Università di Roma, Piazzale A. Moro 5, Roma, 00185, Italy; Istituto di Struttura della Materia (ISM) Del CNR, Via Fosso del Cavaliere 100, Roma, 00133, Italy

We discuss application of the Auger parameter and Wagner plot concepts to the study of small copper clusters deposited on various supports such as C(graphite), SiO2 and Al2O3. We demonstrate that the cluster size and the electronic properties of the support influence the shifts of both the binding energy of the Cu 2p3/2 transition and the kinetic energy of the Cu L3M45M45; 1G Auger transition. We find that the Cu L3M45M45; 1G-2p3/2 Auger parameter and Wagner plot allow one to single out and measure both initial- and final-state effects with a detail which is superior to that achieved in photoemission studies.

Surface science 646 , pp. 298–305

Keywords

Auger parameter, Auger spectroscopy, [object Object], Wagner plot, XPS

CNR authors

Satta Mauro, Palma Amedeo

CNR institutes

ISM – Istituto di struttura della materia, ISMN – Istituto per lo studio dei materiali nanostrutturati