Details

Autor(en) / Beteiligte

• Peters, S.
• Peredkov, S.
• Neeb, M.
• Eberhardt, W.
• Al-Hada, M.

Titel

Size-dependent XPS spectra of small supported Au-clusters

Ist Teil von

• Surface science, 2013-02, Vol.608, p.129-134

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• High resolution XPS spectra (4f) of mass-selected AuN-clusters supported by a thin natural silica layer are presented in the size range N=1–35 atoms per cluster. The XPS binding energy as well as peak width is found to increase systematically with decreasing cluster size. Furthermore a size-dependent asymmetry is observed on the high energy tail of the photoemission peaks. Analysing the XPS shift and line shape using the dynamic electrostatic model helps to identify initial and final state effects such as negative surface core level shift, inhomogeneous broadening, dynamic final-state screening and chemisorption-like interaction between cluster and support. ► Size-dependent XPS shift of supported mass-selected small gold clusters. ► Dynamic screening of 4f core hole by silica substrate during photoemission event. ► Modelling of the XPS shift by the dynamic liquid drop model. ► Contribution of initial and final state effect to the XPS shift and line width.