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Silica encapsulation of sonochemically synthesized iron oxide nanoparticles

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Abstract

A facile sono-chemical approach was applied for the large scale synthesis of silica coated iron oxide magnetic nanoparticles (NPs) using inexpensive and non-toxic chemicals. The as-prepared silica coated magnetic iron oxide (Fe3O4@SiO2 core-shell) NPs have been characterized by XRD, TEM, EDS, and VSM. X-ray diffraction (XRD) and EDS analysis revealed that Fe3O4 NPs have been successfully coated by this simple method. Transmission electron microscopy (TEM) data demonstrated that the thickness of silica coating on iron oxide magnetic NPs is 10 – 15 nm on average. The magnetization curve from the vibrating sample magnetometer (VSM) measurement shows that the magnetization also decreased the as-synthesized silica coated iron oxide NPs compared to the freshly prepared bare iron oxide magnetic NPs, which is also evidence of the synthesis of Fe3O4@SiO2 core-shell NPs.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Chungnam National University, Daejeon, 305-764, Korea

    Md. Nazrul Islam, Mohamed Abbas, Brajalal Sinha, Jong-Ryul Joeng & CheolGi Kim

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  1. Md. Nazrul Islam
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  2. Mohamed Abbas
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  3. Brajalal Sinha
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  4. Jong-Ryul Joeng
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  5. CheolGi Kim
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Correspondence to CheolGi Kim.

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Islam, M.N., Abbas, M., Sinha, B. et al. Silica encapsulation of sonochemically synthesized iron oxide nanoparticles. Electron. Mater. Lett. 9, 817–820 (2013). https://doi.org/10.1007/s13391-013-6019-1

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  • DOI: https://doi.org/10.1007/s13391-013-6019-1

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