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УДК: 620.3
Features of the terahertz spectra of iron oxide nanoparticles in a silicon dioxide shell and of iron oxide and hydroxide nanoparticles
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Publication in Journal of Optical Technology
Афонин М.В., Балбекин Н.С., Гареев Г.З., Гареев К.Г., Горшков А.Н., Королев Д.В., Лучинин В.В., Смолянская О.А. Особенности терагерцовых спектров наночастиц оксида железа в оболочке из диоксида кремния и наночастиц оксида и гидроксида железа // Оптический журнал. 2017. Т. 84. № 8. С. 16–22.
Afonin M.V., Balbekin N.S., Gareev G.Z., Gareev K.G., Gorshkov A.N., Korolev D.V., Luchinin V.V., Smolyanskaya O.A. Features of the terahertz spectra of iron oxide nanoparticles in a silicon dioxide shell and of iron oxide and hydroxide nanoparticles [in Russian] // Opticheskii Zhurnal. 2017. V. 84. № 8. P. 16–22.
V. Afonin, N. S. Balbekin, G. Z. Gareev, K. G. Gareev, A. N. Gorshkov, D. V. Korolev, V. V. Luchinin, and O. A. Smolyanskaya, "Features of the terahertz spectra of iron oxide nanoparticles in a silicon dioxide shell and of iron oxide and hydroxide nanoparticles," Journal of Optical Technology. 84(8), 515-520 (2017). https://doi.org/10.1364/JOT.84.000515
New methods have been developed for noninvasive monitoring of pathological processes in a living organism by means of terahertz spectroscopy and visualization using contrast agents based on magnetic nanoparticles. The nanoparticles must possess good magnetic characteristics, must be nontoxic and stable against aggregation, and must exhibit chemical stability; therefore, they are enclosed in a biologically inert shell. This paper discusses the spectral features of iron oxide nanoparticles in a biologically inert shell consisting of silicon dioxide and nanoparticles of iron oxide and hydroxide in the terahertz frequency range. It is shown that the crystalline phase of iron oxide can be identified for both types of nanoparticles by means of terahertz spectroscopy.
terahertz spectroscopy, magnetic nanoparticles, silicon dioxide, magnetite, goethite
Acknowledgements:The research was supported by the Government of the Russian Federation (074-U01); Russian Foundation for Basic Research (RFBR) (16-32-60010). The studies of colloidal complexes of NPs by x-ray diffraction and vibrational magnetometry were carried out using the equipment of the “X-ray diffraction research methods” and “Innovation technologies of composite nanomaterials” resource centers of the St. Petersburg State University.
OCIS codes: 300.6495, 160.4236, 160.6060, 160.6030
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