Search results for "TiO2 nanostructures"

showing 3 items of 3 documents

Structural and Optical Properties of Novel Surfactant Coated TiO2–Ag Based Nanoparticles

2010

Stable dispersions of surfactant-coated TiO2–Ag based nanoparticles in apolar medium have been prepared by performing sequentially the hydrolysis of titanium(IV) isopropoxide and the reduction of Ag? in the confined space of sodium bis(2-ethylhexyl)sulfosuccinate (NaAOT) reverse micelles. Depending on the sequence length, this novel procedure allowed the synthesis of semiconductor–metal nanoparticles, nominally indicated as TiO2/Ag, TiO2/Ag/TiO2, and TiO2/Ag/TiO2/ Ag, stabilized by a monolayer of oriented surfactant molecules. The structural characterization of these nanoparticles has been performed by High Resolution Transmission Electron Microscopy (HR-TEM), while optical properties were …

Materials scienceOptical propertiesAg@TiO2 nanostructures Optical properties Electron microscopyBand gapNanoparticleNanochemistryGeneral ChemistryAg-TiO2 nanostructuresCondensed Matter PhysicsBiochemistryAg-TiO2 nanostructures; Optical properties; Electron microscopyAmorphous solidCrystallographyMonolayerElectron microscopyGeneral Materials ScienceSurface plasmon resonanceAbsorption (chemistry)High-resolution transmission electron microscopySettore CHIM/02 - Chimica Fisica
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Enhancement of photoelectrochemical activity for water splitting by controlling hydrodynamic conditions on titanium anodization

2015

This work studies the electrochemical and photoelectrochemical properties of a new type of TiO2 nanostructure (nanosponge) obtained by means of anodization in a glycerol/water/NH4F electrolyte under controlled hydrodynamic conditions. For this purpose different techniques such as Scanning Electronic Microscopy (SEM), Raman Spectroscopy, Electrochemical Impedance Spectroscopy (EIS) measurements, Mott–Schottky (M−S) analysis and photoelectrochemical water splitting tests under standard AM 1.5 conditions are carried out. The obtained results show that electron–hole separation is facilitated in the TiO2 nanosponge if compared with highly ordered TiO2 nanotube arrays. As a result, nanosponges en…

NanotubeNanostructureMaterials scienceAnalytical chemistryEnergy Engineering and Power Technologychemistry.chemical_elementElectrolyteINGENIERIA QUIMICAsymbols.namesakeElectrochemical Impedance SpectroscopyElectrical and Electronic EngineeringPhysical and Theoretical ChemistryWater splittingTiO2 nanostructuresRenewable Energy Sustainability and the EnvironmentAnodizingTitaniDielectric spectroscopyHydrodynamic conditionsElectroquímicaChemical engineeringchemistrysymbolsWater splittingMott–Schottky analysisAnodizationRaman spectroscopyTitanium
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Novel Immune TiO2 Photoluminescence Biosensors for Leucosis Detection

2012

Abstract Novel immune photoluminescent biosensor, based on TiO2 nanoparticles, for retroviral leucosis detection has been developed. The photoluminescence spectra were excited by solid state laser with wavelength 355 nm and measured in the range of 370-800 nm. Original photoluminescence spectrum of TiO2 nanoparticles showed wide maximum at 515 nm. The biosensitive layer was formed by immobilization of retroviral leucosis antigens on the surface of TiO2 nanoparticles. Immobilization of antigens on TiO2 surface led to UV-shift of photoluminescence spectrum and increase of PL intensity. The response to different concentrations of retroviral leucosis antibodies has been measured. The decrease o…

PhotoluminescenceMaterials scienceTio2 nanoparticlesAnalytical chemistryleucosis detectionGeneral MedicinePhotochemistryLeucosisimmune biosensorsAdsorptionImmune systemExcited statephotoluminescenceBiosensorEngineering(all)TiO2 nanostructuresProcedia Engineering
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