Journal
SOLID STATE COMMUNICATIONS
Volume 148, Issue 11-12, Pages 496-500Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2008.10.006
Keywords
A. Iron oxide; A. Nanoparticle; B. Hydrothermal; D. Magnetic property
Categories
Funding
- National Basic Research Program of China [2006CB933000]
- Ministry of Education of China [NCET-04-0773]
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gamma-Fe2O3/SiO2 core-shell nanoparticles with an average diameter by about 30 nm were synthesized by hydrothermal reaction of Tetraethoxysilane and Fe(NO3)(3)(center dot)9H(2)O as precursors. The phase component, structure and magnetic properties of the nanoparticles were characterized by X-ray diffraction, transmission electron microscopy and magnetic measurements. The results show that the uniform gamma-Fe2O3 nanoparticles were capped with an amorphous SiO2 thin shell by about 5 nm in the thickness. The effect of hydrothermal temperature and growth mechanism were discussed towards the end of this paper. The magnetic property of nanoparticles was also discussed. (c) 2008 Elsevier Ltd. All rights reserved.
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