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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 56, Number 4
JKCSEZ 56(4)
August 20, 2012 

Preparation of Fe3O4/SiO2 Core/Shell Nanoparticles with Ultrathin Silica Layer
Eue Soon Jang*
Reverse microemulsion procedure, Fe3O4/SiO2 nanoparticles, Silica thickness, Water-to-surfactant ratio, Fe3O4 concentration
We successfully synthesized Fe3O4/SiO2 nanoparticles with ultrathin silica layer of 1.0±0.5 nm that was fine controlled by changing concentration of Fe3O4. Among various reaction conditions for silica coating, increasing concentration of Fe3O4 was more effective approach to decrease silica thickness compared to water-to-surfactant ratio control. Moreover, we found that concentration of the 1-octanol is also important factor to produce the homogeneous Fe3O4/SiO2 nanoparticles. The present approach could be available to apply on preparation of other core/shell nanoparticles with ultrathin silica layer.
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