0000000000276761

AUTHOR

A. Morgante

showing 3 related works from this author

Defects at the TiO2(100) surface probed by resonant photoelectron diffraction.

2006

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.

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)
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Expression of inflammation-related genes in human atherosclerotic plaques

2010

Aims: Atherosclerosis is an inflammator y disease which molecular mechanisms are not been completely investigated. Our aim is to perform a wide expression study of inflammation related genes in human atherosclerotic plaques. Methods: The Human Inflammation Array (Applied Biosystems) was used to perform the mRNA quantification of 92 inflammation-related genes in 12 atherosclerotic plaques, their respective adjacent regions (with a lower grade lesion) and 7 healthy ar teries. The principle of the array is the real-time PCR amplification with a TaqMan probe specific for each gene. Data analysis was performed with SDS 2.3 software with the comparative Ct method using the gene beta-2-microglobulin as h…

atherosclerosis carotid plaques mRNASettore MED/22 - Chirurgia Vascolare
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Stoichiometry-related Auger lineshapes in titanium oxides: Influence of valence-band profile and of Coster-Kronig processes

2004

International audience; The ability to determine the nature and the occurrence of defects is a central need of ceramic surface chemistry. In titanium oxides, the Ti-LMV Auger decays line shape is very sensitive to the titanium degree of oxidation, and has long been empirically used as a qualitative probe of the stoichiometry. In the present work, resonant Auger and resonant valence-band measurements at the Ti-L2,3 edges in TiO2, TiO2–x and metallic titanium provide a clear evidence that the evolutions of the Ti-LMV Auger line shape are due to drastic changes in the valence-band profile and in the probability of L2L3V Coster-Kronig decay processes when a fraction of titanium ions is reduced.…

PACS: 71.20.-b 32.80.Hd 77.84.Bw 82.80.Pvoxidationchemistry.chemical_element02 engineering and technologyceramics01 natural sciencesElectron spectroscopy71.20.-b; 32.80.Hd; 77.84.Bw; 82.80.PvIonAugerX-RAY-ABSORPTION; SURFACE-DEFECTS; RUTILE TIO2; Resonant AugerMetalsymbols.namesakephotoelectron spectra0103 physical sciencesRUTILE TIO2titanium010306 general physicstitanium compoundsAuger electron spectroscopyFermi levelvalence bandsResonant Auger021001 nanoscience & nanotechnologyCondensed Matter PhysicsSURFACE-DEFECTSElectronic Optical and Magnetic Materialsstoichiometrychemistryvisual_artX-RAY-ABSORPTIONsymbolsvisual_art.visual_art_mediumFermi levelspectral line breadthAuger electron spectraAtomic physics0210 nano-technologyStoichiometryTitanium
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