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Pure and Sb-doped SnO 2 nanoparticles studied by photoelectron spectroscopy |
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| Authors: | C McGinley S Al Moussalami M Riedler M Pflughoefft H Borchert M Haase ARB de Castro H Weller T Möller |
| Institution: | HASYLAB/DESY, Notkestrasse 85, D-22603 Hamburg, Germany, DE II. Institut für Experimentalphysik, Universit?t Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany, DE Institut für Physikalische Chemie, Universit?t Hamburg, D-22761 Hamburg, Germany, DE Laboratorio National de Luz Sincrotron, Campinas 13081-90, Brazil, BR |
| Abstract: | We describe photoemission results from pure and Sb-doped SnO2 nanoparticles deposited on gold substrates. Photoelectron spectra with synchrotron radiation were recorded for Sn 3d, Sb 3d and O 1s core levels and valence bands in the 500-1200 eV energy range. For pure SnO2 nanoparticles the surface is terminated by an oxygen rich layer with no obvious surface environment for Sn. When doped n-type with 9.1% or 16.7% Sb, dopant atoms are concentrated near the surface of the nanoparticles. The valence state of the dopant atoms is predominantly SbV. Plasmon satellite features are also observed in core level photoemission spectra and their intensity relative to the main peak increases with increasing photon energy. Received 30 November 2000 |
| Keywords: | PACS 61 46 +w Nanoscale materials: clusters nanoparticles nanotubes and nanocrystals – 79 60 -i Photoemission and photoelectron spectra – 61 72 Ww Doping and impurity implantation in other materials |
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