Abstract
The structural, electronic, and magnetic properties of iron oxide nanoparticles encapsulated in hybrid biodegradable therapeutic systems based on poly-3-hydroxybutyrate and chitosan are comprehensively studied using Mössbauer spectroscopy, X-ray diffraction, small-angle X-ray scattering, and macroscopic magnetization measurements. It is shown that iron oxide in concentrations of 4 and 8 wt % in the polymer matrix of magnetically isotropic and magnetoanisotropic systems exists in the form of nanosized (d ≈ 7–8 nm) superparamagnetic clusters. Iron oxide clusters have the structure of a nonstoichiometric inverse spinel, intermediate between polymorphous modifications of Fe3O4 and γ-Fe2O3.
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Original Russian Text © V.E. Prusakov, Yu.V. Maksimov, K.N. Nishchev, A.V. Golub’ev, V.I. Beglov, Yu.F. Krupyanskii, A.V. Bychkova, A.L. Iordanskii, A.A. Berlin, 2018, published in Khimicheskaya Fizika, 2018, Vol. 37, No. 1, pp. 83–90.
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Prusakov, V.E., Maksimov, Y.V., Nishchev, K.N. et al. Hybrid Biodegradable Nanocomposites Based on a Biopolyester Matrix and Magnetic Iron Oxide Nanoparticles: Structural, Magnetic, and Electronic Characteristics. Russ. J. Phys. Chem. B 12, 158–164 (2018). https://doi.org/10.1134/S1990793118010116
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DOI: https://doi.org/10.1134/S1990793118010116