Preparation and Characterization of Gold-Loaded Magnetite/Silica Core-Shell Composites

Abstract:

The fabrication of gold-loaded magnetite/silica core-shell particles was presented in this paper. First, 250 nm of magnetic Fe₃O₄ nanoparticles were prepared by solvothermal reaction. Then, the Fe₃O₄ particles were coated by SiO₂, and Au nanoparticles (AuNPs), respectively. The core-shell structure of these microspheres was confirmed by transmission electron microscopy (TEM) and Power X-ray diffraction (XRD). The magnetic property of the core-shell microspheres was investigated at room temperature. The results indicated that the core-shell composites had a well-retained high magnetic intensity, thus it can be easily separated from the mixture in less than a few minutes by simply using a magnet.

• Periodical: Journal of Nano Research (Volume 42)
• Pages: 47-52
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.42.47
• Online since: July 2016
• Authors: Dan Dan Huang, Zhao Dai*, Kun Yang, Yuan Yuan Chu
• Keywords: Gold Nanoparticles, Magnetic Composites, Nanoparticle, Self Assembly

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