https://doi.org/10.1007/s100530170097
Pure and Sb-doped SnO2 nanoparticles studied by photoelectron spectroscopy
1
HASYLAB/DESY, Notkestrasse 85, D-22603 Hamburg, Germany
2
II. Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg
3
Institut für Physikalische Chemie, Universität Hamburg, D-22761 Hamburg, Germany
4
Laboratorio National de Luz Sincrotron, Campinas 13081-90, Brazil
Corresponding author: a mcginley@mail.desy.de
Received:
30
November
2000
Published online: 15 September 2001
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.
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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
