Search results for " cobalt"

showing 4 items of 24 documents

Macro-micro relationship in nanostructured functional composites

2012

This paper examines the results of the characterization of two functional composites: Poly(methyl methacrylate) (PMMA)-Ce:YAG (yttrium aluminium garnet doped with cerium) and PMMA-cobalt hexacyanoferrate (CoHCF). The composites were prepared as possible emitters in the fields of lighting thermal sensors. The prepared composites were char- acterized using transmission electron microscopy (TEM), nuclear magnetic resonance (NMR) spectroscopy, thermogravi- metric analysis (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) analyses to study the correlation between micro and macro characteristics. We found that the molecular interactions of the two different fill…

cobalt hexacyanoferrateMaterials sciencePolymers and PlasticsGeneral Chemical EngineeringComposite numberchemistry.chemical_elementlcsh:Chemical technologyNanocompositeschemistry.chemical_compoundDifferential scanning calorimetryYttrium aluminium garnetnanocomposites PMMA yttrium aluminium garnet doped with cerium (Ce:YAG) cobalt hexacyanoferrate (CoHCF) interfacial interactionlcsh:TA401-492Materials ChemistryCeYAGlcsh:TP1-1185Physical and Theoretical ChemistryComposite materialMethyl methacrylateSettore CHIM/02 - Chimica Fisicachemistry.chemical_classificationOrganic ChemistryPolymerDynamic mechanical analysisPMMACeriumchemistryTransmission electron microscopyYAG) cobalt hexacyanoferrate (CoHCF) interfacial interaction [nanocomposites PMMA yttrium aluminium garnet doped with cerium (Ce]lcsh:Materials of engineering and construction. Mechanics of materialsinterfacial interactionExpress Polymer Letters
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Double-CO32− Centered [CoII5] Wheel and Modeling of Its Magnetic Properties

2010

A high-spin Co(II) cluster with a rare pentagonal molecular structure and formula [Co(5)(CO(3))(2)(bpp)(5)]ClO(4) (1; Hbpp is 2,6-bis(phenyliminomethyl)-4-methylphenolate) has been synthesized and characterized by single-crystal X-ray diffraction. This topology arises from fusing five [Co(2)(bpp)] moieties in a cyclic manner around two CO(3)(2-) central ligands, resulting in propeller-like configuration. The irregular coordination of the carbonate ions to the metal centers results in a combination of coordination numbers (CNs) of the Co(II) ions of five and six. The bulk magnetization of this complicated magnetically exchanged system has been modeled successfully by employing a matrix diago…

crystal structureCoordination numberInorganic chemistrycarbonatesCatalysisIonCoordination complexMetalMagnetizationCluster (physics)Moleculecarbonate ligandschemistry.chemical_classificationOrganic Chemistrycarbonate ligands; carbonates; cobalt; coordination chemistry; density functional calculations; magnetic properties; spin-orbit coupling; crystal structure.General ChemistrySpin–orbit interactioncobaltspin-orbit couplingCrystallographychemistryvisual_artdensity functional calculationscoordination chemistryvisual_art.visual_art_mediummagnetic propertiesChemistry - A European Journal
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Structural Characterization of Surfactant-Coated Bimetallic Cobalt/Nickel Nanoclusters by XPS, EXAFS, WAXS, and SAXS

2011

Cobalt nickel bimetallic nanoparticles were synthesized by changing the sequence of the chemical reduction of Co(II) and Ni(II) ions confined in the core of bis(2-ethylhexyl)phosphate (2)., and Ni(DEHP)(2). The reduction was carried out by mixing, sequentially or contemporaneously, fixed amounts of n-heptane solution of Co(DEHP)2 and Ni(DEHP)2 micelles with a solution of sodium borohydride in ethanol at a fixed (reductant)/(total metal) molar ratio. This procedure involves the rapid formation of surfactant-coated nanoparticles, indicated as Co/Ni (Co after Ni), Ni/Co (Ni after Co), and Co + Ni (simultaneous), followed by their slow separation as nanostructures embedded in a sodium bis(2-eth…

inorganic chemicalsendocrine systemMaterials sciencechemistry.chemical_elementNanoparticleNanoclustersMetalSodium borohydridechemistry.chemical_compoundX-ray photoelectron spectroscopyNANOPARTICLESPARTICLESBimetallic Cobalt/Nickel Nanoclusters. XPS. EXAFS. WAXS. SAXS.GOLDPhysical and Theoretical ChemistryBimetallic stripMICELLESSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsCrystallographyNickelGeneral Energychemistryvisual_artNANOPARTICLES; PARTICLES; GOLD; MICELLESvisual_art.visual_art_mediumCobaltNuclear chemistry
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Nanostructured Material Fabrication for Energy Conversion

2010

tin alloy ruthenium oxide palladium cobalt alloy lithium ion battery electrolyzersSettore ING-IND/23 - Chimica Fisica Applicata
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