Abstract:
Magnetic core/shell (CS) nanocomposites (MNCs) are synthesized using a simple method, in which a magnesium ferrite nanoparticle (MgFe22O44) is a core, and an amorphous silicon dioxide (silica SiO22) 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 MgFe22O44/SiO22 MNC has the core/shell structure formed by the Fe–O–Si chemical bond. After coating with silica, the MgFe22O44/SiO22 MNC saturation magnetization significantly decreases in comparison with MgFe22O44 particles without a SiO22 shell. Spherical particles agglomerated from MgFe22O44 nanocrystallites ∼∼9.6 and ∼∼11.5 nm in size function as cores coated with SiO22 shells ∼∼30 and ∼∼50 nm thick, respectively. The total size of obtained CS MNCs is ∼∼200 and 300 nm, respectively. Synthesized CS MgFe22O44/SiO22 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.
Citation:
A. S. Kamzin, H. Das, N. Wakiya, A. A. Valiullin, “Magnetic core/shell nanocomposites MgFe22O44/SiO22 for biomedical application: synthesis and properties”, Fizika Tverdogo Tela, 60:9 (2018), 1707–1716; Phys. Solid State, 60:9 (2018), 1752–1761
\Bibitem{KamDasWak18}
\by A.~S.~Kamzin, H.~Das, N.~Wakiya, A.~A.~Valiullin
\paper Magnetic core/shell nanocomposites MgFe$_{2}$O$_{4}$/SiO$_{2}$ for biomedical application: synthesis and properties
\jour Fizika Tverdogo Tela
\yr 2018
\vol 60
\issue 9
\pages 1707--1716
\mathnet{http://mi.mathnet.ru/ftt9074}
\crossref{https://doi.org/10.21883/FTT.2018.09.46388.019}
\elib{https://elibrary.ru/item.asp?id=36903688}
\transl
\jour Phys. Solid State
\yr 2018
\vol 60
\issue 9
\pages 1752--1761
\crossref{https://doi.org/10.1134/S1063783418090147}
Linking options:
https://www.mathnet.ru/eng/ftt9074
https://www.mathnet.ru/eng/ftt/v60/i9/p1707
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