Synthesis and characterization of Fe3O4–TiO2 core-shell nanoparticles

• DOI: 10.1063/1.4896070
• Publication Date: 2014-09-19T00:30:30Z
• Authors: M. Stefan; O. Pana; C. Leostean; C. Bele; D. Silipas; M. Senila; E. Gautron
• Keywords: Magnetic semiconductor

Composite core-shell nanoparticles may have morpho-structural, magnetic, and optical (photoluminescence (PL)) properties different from each of the components considered separately. The Fe3O4–TiO2 can be controlled by adjusting titania amount (shell thinness). Core–shell were prepared seed mediated growth semiconductor (TiO2) through a modified sol-gel process onto preformed magnetite (Fe3O4) cores resulted co-precipitation method. structure morphology samples characterized X-ray diffraction, transmission electron microscopy (TEM), high resolution-TEM respectively. photoelectron spectroscopy was correlated with ICP-AES. Magnetic measurements, absorption spectra, as well PL indicate presence charge/spin transfer conduction band into gap nanocrystals. modifies both Fe3O4 TiO2 magnetic properties,