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RESEARCH PRODUCT
Structural and optical properties of novel surfactant-coated Yb-TiO2 nanoparticle
Pietro CalandraSebastiano TrussoDomenico LombardoV. Turco LiveriAlessandro Pistonesubject
Materials scienceLaser ablationNanostructureHRTEMYb@TiO2 nanoparticles Optical properties HRTEM Fluorescence Synthesis Laser ablationNucleationNanoparticleBioengineeringNanotechnologyGeneral ChemistryYb-TiO2 nanoparticlesCondensed Matter PhysicsLaser ablation synthesis in solutionAtomic and Molecular Physics and OpticsLaser ablationChemical engineeringTransmission electron microscopyModeling and SimulationYb-TiO2 nanoparticles; HRTEM; Laser ablationGeneral Materials ScienceLuminescenceHigh-resolution transmission electron microscopySettore CHIM/02 - Chimica Fisicadescription
Abstract In this paper a novel hybrid approach to synthesise composite nanoparticles is presented. It is based on the laser ablation of a bulk target (Yb) immersed in a reversed micellar solution which contains nanoparticles of a different host material (TiO2 nanoparticles) previously synthesised by chemical method. This approach thus exploits the advantages of the chemical synthesis through reversed micellar solution (size control, nanoparticle stabilisation), and of the laser ablation (‘‘clean’’ synthesis, no side reactions). Central role is played by the microscopic processes controlling the deposition of the ablated Yb atoms onto the surface of TiO2 nanoparticles which actually behave as nucleation seeds. The structural features of the resulting Yb@TiO2 composite nanoparticles have been studied by Transmission ElectronMicroscopy, whereas their peculiar optical properties have been explored by UV–Vis spectroscopy and steady-state fluorescence. Results consistently show the formation of Yb and TiO2 glued nanodomains to form nearly spherical and non-interacting nanoparticles with enhanced photophysical properties.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-11-13 |