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http://dx.doi.org/10.5012/jkcs.2014.58.1.100

Synthesis and Characterization of Superparamagnetic Fe3O4@SiO2 Nanoparticles  

Kulkarni, Sachnin A. (Department of CEES, MIT College of Engineering)
Sawadh, P.S. (Department of Physics, B.D. College of Engineering)
Palei, Prakash K. (Department of CEES, MIT College of Engineering)
Publication Information
Journal of the Korean Chemical Society / v.58, no.1, 2014 , pp. 100-104 More about this Journal
Abstract
Magnetite nanoparticles were prepared by co-precipitation method and then silica was coated onto the surface of $Fe_3O_4$ by hydrolysis of TEOS. The silica coated magnetite nanoparticles were characterized for its structural, microstructural, optical, vibrational and magnetic properties by X-ray diffraction analysis, Scanning electron microscopy, UV-visible spectroscopy, Infrared spectroscopy and Vibration sample magnetometer, respectively. XRD study confirmed the presence of $SiO_2$ on the surface of magnetite nanoparticles. SEM study indicated that with increase in TEOS content the particles become bigger and mono-disperse. It was also found that the silica coating prevents magnetic particles from aggregation and imparts excellent stability.
Keywords
$Fe_3O_4$; Co-precipitation; Superparamagnetic; Aggregation;
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