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RESEARCH PRODUCT
Defects at the TiO2(100) surface probed by resonant photoelectron diffraction.
Sylvie BourgeoisLuca FloreanoBruno DomenichiniAlberto VerdiniA. CossaroP. Le FèvrePeter KrügerD. ChandesrisA. MorganteHélène Magnansubject
DiffractionMaterials scienceScatteringForward scatterBand gapAnalytical chemistry02 engineering and technologySurfaces and Interfaces021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesMolecular physicsPhotoelectron diffractionResonant photoemissionSurfaces Coatings and FilmsAbsorption edgeRutileExcited state0103 physical sciencesMaterials ChemistryTitanium dioxide010306 general physics0210 nano-technologySurface defectsLine (formation)description
We report photoelectron diffraction (PED) experiments of weakly sub-stoichiometric TiO 2 (100) rutile surfaces. Apart from standard core-level PED from the Ti-2p3/2 line, we have studied valence band PED from the defect induced Ti-3d states in the insulating band gap. For maximum yield, the latter were resonantly excited at the Ti-2p absorption edge. The PED patterns have been analyzed within the forward scattering approximation as well as by comparison with simulated PED patterns obtained in multiple scattering calculations. The analysis shows that the defect induced Ti-3d charge is mainly located on the second layer Ti atoms. © 2007 Elsevier B.V. All rights reserved.
year | journal | country | edition | language |
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2006-09-03 |