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Stefan, M., Pana, O., Leostean, C., Bele, C., Silipas, D., Senila, M. & Gautron, E. (2014) Synthesis and characterization of Fe3O4-TiO2 core-shell nanoparticles. J. Appl. Phys. 116 114312. 
Added by: Laurent Cournède (2016-03-10 21:01:55)
Type de référence: Article
DOI: 10.1063/1.4896070
Numéro d'identification (ISBN etc.): 0021-8979
Clé BibTeX: Stefan2014
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Catégories: IMN
Mots-clés: anatase tio2, iron-oxide, magnetic nanoparticles, microspheres, one-pot, optical-properties, organic-synthesis, photocatalytic activity, Sol-gel, TiO2 nanoparticles
Créateurs: Bele, Gautron, Leostean, Pana, Senila, Silipas, Stefan
Collection: J. Appl. Phys.
Consultations : 11/424
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
Composite core-shell nanoparticles may have morpho-structural, magnetic, and optical (photoluminescence (PL)) properties different from each of the components considered separately. The properties of Fe3O4-TiO2 nanoparticles can be controlled by adjusting the titania amount (shell thinness). Core-shell nanoparticles were prepared by seed mediated growth of semiconductor (TiO2) through a modified sol-gel process onto preformed magnetite (Fe3O4) cores resulted from the co-precipitation method. The structure and morphology of samples were characterized by X-ray diffraction, transmission electron microscopy (TEM), and high resolution-TEM respectively. X-ray photoelectron spectroscopy was correlated with ICP-AES. Magnetic measurements, optical absorption spectra, as well as PL spectroscopy indicate the presence of a charge/spin transfer from the conduction band of magnetite into the band gap of titania nanocrystals. The process modifies both Fe3O4 and TiO2 magnetic and optical properties, respectively. (C) 2014 AIP Publishing LLC.
Added by: Laurent Cournède  
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