Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.98: Poster
Mittwoch, 24. März 2010, 17:45–20:30, Poster B1
Interaction of Fe and Fe2O3 with H2O and CO — •Kai Volgmann1, Anselm Hahn1, Florian Voigts1, and Wolfgang Maus-Friedrichs1,2 — 1Institut für Physik und Physikalische Technologien, TU Clausthal, Leibnizstr. 4, 38678 Clausthal-Zellerfeld — 2Clausthaler Zentrum für Materialtechnik, TU Clausthal, Leibnizstr. 4, 38678 Clausthal-Zellerfeld
Basic investigations have been done on the interaction of Fe and Fe2O3 with molecular oxygen1. MIES/UPS and XPS measurements revealed that a passivating oxide layer has been formed and inhibits a further oxidation. The scope of this work is to examine the interaction of Fe and Fe2O3 with water and CO. This is a further step towards a basic data set for further research on the photocatalytical processes on hematite surfaces found under Martian conditions.
Iron and Iron(III) oxide films are investigated by means of their interaction with H2O and CO. These reactions have been studied with photoelectron spectroscopy. X-ray photoelectron spectroscopy is used to determine stoichiometry of the samples, while Ultraviolet photoelectron spectroscopy and Metastable Induced Electron Spectrocopy are used to analyse the valence band region and to gain information about changes in workfunction due to reactions on the surfaces.
1K.Volgmann, F. Voigts, W. Maus-Friedrichs, The interaction of oxygen molecules with iron films studied with
MIES, UPS and XPS, Surface Science, submitted