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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 58, Number 1
JKCSEZ 58(1)
February 20, 2014 

Synthesis and Characterization of Superparamagnetic Fe3O4@SiO2 Nanoparticles
Sachnin A Kulkarni*, P S Sawadh, Prakash K Palei
Fe3O4, Co-precipitation, Superparamagnetic, Aggregation
Magnetite nanoparticles were prepared by co-precipitation method and then silica was coated onto the surface of Fe3O4 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 SiO2 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.
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