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http://dx.doi.org/10.5012/jkcs.2012.56.4.478

Preparation of Fe3O4/SiO2 Core/Shell Nanoparticles with Ultrathin Silica Layer  

Jang, Eue-Soon (Department of Applied Chemistry, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Chemical Society / v.56, no.4, 2012 , pp. 478-483 More about this Journal
Abstract
We successfully synthesized $Fe_3O_4/SiO_2$ nanoparticles with ultrathin silica layer of $1.0{\pm}0.5$ nm that was fine controlled by changing concentration of $Fe_3O_4$. Among various reaction conditions for silica coating, increasing concentration of $Fe_3O_4$ 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 $Fe_3O_4/SiO_2$ nanoparticles. The present approach could be available to apply on preparation of other core/shell nanoparticles with ultrathin silica layer.
Keywords
Reverse microemulsion procedure; $Fe_3O_4/SiO_2$ nanoparticles; Silica thickness; Water-to-surfactant ratio; $Fe_3O_4$ concentration;
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