Structural and optical properties of novel surfactant-coated YbiO sub(2) nanoparticles

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 (TiO sub(2) nanoparticles) previously synthesised by ch...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2011-11, Vol.13 (11), p.5833-5839
Main Authors: Calandra, P, Lombardo, D, Pistone, A, Turco Liveri, V, Trusso, S
Format: Article
Language:English
Subjects:
Ablation
Laser ablation
Nanoparticles
Nanostructure
Nucleation
Optical properties
Synthesis
Titanium dioxide
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Summary: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 (TiO sub(2) 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 TiO sub(2) nanoparticles which actually behave as nucleation seeds. The structural features of the resulting YbiO sub(2) composite nanoparticles have been studied by Transmission Electron Microscopy, whereas their peculiar optical properties have been explored by UV-Vis spectroscopy and steady-state fluorescence. Results consistently show the formation of Yb and TiO sub(2) glued nanodomains to form nearly spherical and non-interacting nanoparticles with enhanced photophysical properties.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-010-0133-x