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This article is cited in 17 scientific papers (total in 17 papers)
Magnetism
Magnetic core/shell nanocomposites MgFe$_{2}$O$_{4}$/SiO$_{2}$ for biomedical application: synthesis and properties
A. S. Kamzina, H. Dasbc, N. Wakiyade, A. A. Valiullinf a Ioffe Institute, St. Petersburg
b Graduate School of Science and Technology, Shizuoka University,
3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
c Materials Science Division, Atomic Energy Centre, Dhaka 1000, Bangladesh
d Department of Electronics and Materials Science, Shizuoka University,
3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
e Research Institute of Electronics, Shizuoka University,
3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
f Kazan (Volga Region) Federal University
Abstract:
Magnetic core/shell (CS) nanocomposites (MNCs) are synthesized using a simple method, in which a magnesium ferrite nanoparticle (MgFe$_{2}$O$_{4}$) is a core, and an amorphous silicon dioxide (silica SiO$_2$) layer is a shell. The composition, morphology, and structure of synthesized particles are studied using X-ray diffraction, field emission electron microscopy, transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), scattering electrophoretic photometer, thermogravimetric analysis (TGA), and Mössbauer spectroscopy. It is found that the MgFe$_{2}$O$_{4}$/SiO$_2$ MNC has the core/shell structure formed by the Fe–O–Si chemical bond. After coating with silica, the MgFe$_{2}$O$_{4}$/SiO$_2$ MNC saturation magnetization significantly decreases in comparison with MgFe$_{2}$O$_{4}$ particles without a SiO$_2$ shell. Spherical particles agglomerated from MgFe$_2$O$_4$ nanocrystallites $\sim$9.6 and $\sim$11.5 nm in size function as cores coated with SiO$_2$ shells $\sim$30 and $\sim$50 nm thick, respectively. The total size of obtained CS MNCs is $\sim$200 and 300 nm, respectively. Synthesized CS MgFe$_2$O$_4$/SiO$_2$ MNCs are very promising for biomedical applications, due to the biological compatibility of silicon dioxide, its sizes, and the fact that the Curie temperature is in the region required for hyperthermal therapy, 320 K.
Received: 23.01.2018 Revised: 15.03.2018
Citation:
A. S. Kamzin, H. Das, N. Wakiya, A. A. Valiullin, “Magnetic core/shell nanocomposites MgFe$_{2}$O$_{4}$/SiO$_{2}$ for biomedical application: synthesis and properties”, Fizika Tverdogo Tela, 60:9 (2018), 1707–1716; Phys. Solid State, 60:9 (2018), 1752–1761
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https://www.mathnet.ru/eng/ftt9074 https://www.mathnet.ru/eng/ftt/v60/i9/p1707
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