High resolution photoemission study on SnO2 gas sensors
| Autor: | Nicolae Barsan, G. Le Lay, Udo Weimar, M. Sinner-Hettenbach, Mats Göthelid, H. von Schenck, L. Giovanelli, T. Weiß |
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| Rok vydání: | 2001 |
| Předmět: |
Detection limit
Photon Chemistry Doping Metals and Alloys Analytical chemistry Surfaces and Interfaces Electronic structure Spectral line Surfaces Coatings and Films Electronic Optical and Magnetic Materials Metal visual_art Materials Chemistry visual_art.visual_art_medium Condensed Matter::Strongly Correlated Electrons Gas detector Ultraviolet photoelectron spectroscopy |
| Zdroj: | Thin Solid Films. 391:192-197 |
| ISSN: | 0040-6090 |
| Popis: | Pd-, Pt-doped and undoped SnO 2 gas sensors were studied by synchrotron radiation photoelectron spectroscopy (SRPES) and laboratory source UPS (ultraviolet photoelectron spectroscopy). Valence band spectra were recorded for photon energies of 60-120 eV (SRPES) and for 40.81 eV (UPS). The spectra were analyzed by factor analysis and generation of difference spectra. A comparison of the samples shows that the doping material of these sensors is not introducing additional states to the surface electronic structure within the limit of detection. This leads to the conclusion that the surfaces of the grains are not enriched with the metal additives. |
| Databáze: | OpenAIRE |
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