Synthesis and characterization of Fe{sub 3}O{sub 4}–TiO{sub 2} core-shell nanoparticles

Journal Article · Sun Sep 21 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4896070· OSTI ID:22306018

Pana, O.; Leostean, C.; Silipas, D. ^[1]; Bele, C. ^[2]; Senila, M. ^[3]; Gautron, E. ^[4]

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1. National Institute for R and D of Isotopic and Molecular Technology, 67–103 Donat St., 400295 Cluj-Napoca (Romania)
2. University of Agricultural Sciences and Veterinary Medicine, 3-5 Calea Mănăştur, 400372 Cluj-Napoca (Romania)
3. INCDO-INOE 2000, Research Institute for Analytical Instrumentation, 65 Donat St., 400293 Cluj-Napoca (Romania)
4. Institute of Materials Jean Rouxel, 2 rue de la Houssière, P.O. Box 32229, 44322 Nantes Cedex 3 (France)

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 Fe{sub 3}O{sub 4}–TiO{sub 2} nanoparticles can be controlled by adjusting the titania amount (shell thinness). Core–shell nanoparticles were prepared by seed mediated growth of semiconductor (TiO{sub 2}) through a modified sol-gel process onto preformed magnetite (Fe{sub 3}O{sub 4}) 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 Fe{sub 3}O{sub 4} and TiO{sub 2} magnetic and optical properties, respectively.

• OSTI ID: 22306018
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
AUGER ELECTRON SPECTROSCOPY
COPRECIPITATION
CRYSTAL GROWTH
FERRITES
IRON OXIDES
MAGNETITE
NANOPARTICLES
NANOSTRUCTURES
OPTICAL PROPERTIES
PHOTOLUMINESCENCE
RESOLUTION
SEMICONDUCTOR MATERIALS
SOL-GEL PROCESS
SPIN
SYNTHESIS
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY