Search results for "Oxide surface"

showing 3 items of 3 documents

The Effect of Electronic Properties of Anodized and Hard Anodized Ti and Ti6Al4V on Their Reactivity in Simulated Body Fluid

2022

The electronic properties of barrier and porous layers on Ti and Ti6Al4V were studied. Barrier anodic oxides grown to 40 V on Ti and on Ti6Al4V are both n-type semiconductors with a band gap of 3.3 eV and 3.4 eV respectively, in agreement with the formation of amorphous TiO2. Anodizing to 200 V at 20 mA cm−2 in calcium acetate and β-glycerol phosphate disodium pentahydrate leads to the formation of Ca and P containing porous films with a photoelectrochemical behaviour dependent on the metallic substrate. A band gap of 3.2 eV and the flat band potential of −0.5 V vs Ag/AgCl were measured for the porous oxide on Ti, while optical transitions at 2.15 eV and a significantly more positive flat b…

Aluminum alloyAnodic oxidationPorous layerGlycerol phosphateAnodizingFlat-band potentialBarrier layerOxide surface layerMaterials ChemistryElectrochemistryPentahydrateOxide surface layer Electrochemical Measurments AnodizingTernary alloyN-type semiconductorPorous oxideRenewable Energy Sustainability and the EnvironmentVanadium alloys Anodic oxideSimulated body fluids Electronic propertiesCondensed Matter PhysicsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsEnergy gapSettore ING-IND/23 - Chimica Fisica ApplicataElectrochemical MeasurmentsTitanium dioxideTitanium alloyBody fluidSubstrateCalcium acetate
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Spectroscopic and Theoretical Study of the Grafting Modes of Phosphonic Acids on ZnO Nanorods

2013

Metal oxides are versatile substrates for the design of a wide range of SAM-based organic-inorganic materials among which ZnO nanostructures modified with phosphonic SAM are promising semiconducting systems for applications in technological fields such as biosensing, photonics, and field-effect transistors (FET). Despite previous studies reported on various successful grafting approaches, issues regarding preferred anchoring modes of phosphonic acids and the role of a second reactive group (i.e., a carboxylic group) are still a matter of controversial interpretations. This paper reports on an experimental and theoretical study on the functionalization of ZnO nanorods with monofunctional alk…

Materials scienceNanostructureOXIDE SURFACESNanoparticleMetalchemistry.chemical_compoundSELF-ASSEMBLED MONOLAYERSNANOPARTICLESOrganic chemistrySELF-ASSEMBLED MONOLAYERS; RAY PHOTOELECTRON-SPECTROSCOPY; POLARIZABLE CONTINUUM MODEL; MOLECULAR-ORBITAL METHODS; SENSITIZED SOLAR-CELLS; SURFACE FUNCTIONALIZATION; OXIDE SURFACES; ZINC-OXIDE; NANOPARTICLES; ALUMINUMZINC-OXIDEPhysical and Theoretical ChemistryBifunctionalSelf-assembled monolayerSURFACE FUNCTIONALIZATIONALUMINUMCombinatorial chemistrySurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsMOLECULAR-ORBITAL METHODSGeneral EnergychemistryPOLARIZABLE CONTINUUM MODELvisual_artRAY PHOTOELECTRON-SPECTROSCOPYvisual_art.visual_art_mediumSurface modificationNanorodSENSITIZED SOLAR-CELLSBiosensorThe Journal of Physical Chemistry C
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Molybdenum thin film growth on a TiO2 (1 1 0) substrate.

2009

International audience; We report a first principles study on the structure and energetics of thin films of molybdenum on a (1 1 0) surface of rutile TiO2. Mo films with 1 × 1 epitaxy in the coverage range between 0.5 and 2 monolayer are investigated. The most stable structures are those which maximize the number of Mo–Mo bonds. This leads to two-dimensional structures with zigzag Mo–Mo coordination for 1 monolayer coverage and three-dimensional structures with approximately body-centered cubic coordination for higher coverage. For a coverage up to 1.5 monolayers, the interface Mo atoms preferentially occupy the so-called upper hollow adsorption site with three Mo–O bonds

MolybdenumChemistryThin filmschemistry.chemical_element02 engineering and technologySubstrate (electronics)021001 nanoscience & nanotechnologyCondensed Matter PhysicsEpitaxy01 natural sciencesBiochemistryCrystallographyAdsorptionZigzagRutileMolybdenum0103 physical sciencesMonolayerOxide surfacePhysical and Theoretical ChemistryThin film010306 general physics0210 nano-technology
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