0000000000619981

AUTHOR

M. Gillet

showing 3 related works from this author

Evidence of hexagonal WO3 structure stabilization on mica substrate

2009

International audience; WO3 nanorods are grown by a simple vapor deposition method on a mica substrate and characterized by Selected Area Electron Diffraction and Energy Dispersive X-rays Spectroscopy. Experimental results show the clear evidence of an unexpected WO3 hexagonal structure as well as an epitaxial growth on the mica substrate. Besides, potassium is evidenced inside the nanorods. It is thus deduced that a metastable WO3 hexagonal phase is stabilized by epitaxy through a tungsten bronze interlayer having same hexagonal structure.

Materials scienceGrowth mechanismSupported nanostructureschemistry.chemical_elementMineralogy02 engineering and technologyChemical vapor depositionTungsten010402 general chemistryEpitaxy01 natural sciencesMaterials ChemistryMetals and AlloysHexagonal phaseTungsten oxideSurfaces and Interfaces021001 nanoscience & nanotechnology0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsCrystallographychemistryElectron diffractionTransmission Electron MicroscopyNanorodMicaSelected area diffraction0210 nano-technologyThin Solid Films
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An epitaxial hexagonal tungsten bronze as precursor for WO3 nanorods on mica.

2008

International audience; Tungsten oxide nanorods are grown at atmospheric pressure and low temperature (360 1C), by sublimation of WO3 and condensation on mica substrates. The nanorods are characterized by atomic force microscopy, high-resolution electron microscopy, energy-dispersive X-ray spectroscopy and high energy electron diffraction. The experimental results evidence the formation of a hexagonal tungsten bronze at the nanorod–substrate interface. The epitaxial relationships of the nanorods on mica are determined and the role of epitaxial orientation of the interfacial bronze in the nanorod growth and morphology are discussed.

Materials sciencechemistry.chemical_elementNanotechnologyTungsten bronzes02 engineering and technologyTungstenengineering.material010402 general chemistryEpitaxy01 natural scienceslaw.inventionInorganic ChemistrylawMaterials ChemistryBronzeGrowth from vapourVapour phase epitaxyOxides021001 nanoscience & nanotechnologyCondensed Matter Physics0104 chemical sciencesNanostructureschemistryElectron diffractionChemical engineeringPACS 61.46.Km 68.37.Og 68.37.Ps 81.07.bengineeringNanorodSublimation (phase transition)MicaElectron microscope0210 nano-technology
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Growth, Structure, and Stability of KxWO3 Nanorods on Mica Substrate

2012

International audience; KxWO3 nanorods, interesting as gas sensors, were elaborated on mica muscovite substrate and characterized by atomic force microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and mainly transmission electron microscopy. A combination of structural analyses allowed determining the morphology of these rods, and selected area electron diffraction experiments pointed out the simultaneous presence of the exotic hexagonal and stable monoclinic phases. Moreover, the presence of potassium inside the nanorods, coming from the mica substrate, was revealed. By combining all the observations, a growth model is proposed, consisting of the stacking of two di…

Materials scienceScanning electron microscopePHASE02 engineering and technology010402 general chemistryEpitaxy01 natural sciencesPARAMETERSTHIN-FILMSCHEMISTRYSENSORSPhysical and Theoretical ChemistryTEMPERATURESPECTROSCOPYHexagonal phase[CHIM.MATE]Chemical Sciences/Material chemistry021001 nanoscience & nanotechnology0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsOXIDE NANORODSCrystallographyGeneral EnergyTransmission electron microscopyHEXAGONAL TUNGSTEN TRIOXIDE[ CHIM.MATE ] Chemical Sciences/Material chemistryNanorodMicaSelected area diffractionNANOCRYSTALLINE WO3 FILMS0210 nano-technologyMonoclinic crystal system
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