Abstract
Nuclear magnetic resonance relaxation properties of aqueous solution containing nanocomposites based on magnetite and maghemite nanoparticles stabilized by arabinogalactan obtained from Baikal larch (Larix sibirica) wood matrix were investigated. The relaxation properties of the solutions, namely, viscosity dependences of T 1 and T 2 and magnetic field dependence of T 1, were studied experimentally. Two models of the nanocomposite granular structure corresponding to two limiting cases of ferromagnetic material distribution over the arabinogalactan matrix were considered. The first one assumes a homogeneous distribution of magnetite and maghemite nanoparticles over the spherical arabinogalactan matrix, while the second one considers a single hard ferromagnetic core at the center of the spherical arabinogalactan matrix. Theoretical fitting of the experimental results within these models was performed.
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This work was supported by the Russian Foundation for Basic Research (grants 09-03-00091 and 11-03-00296), President grant for supporting the Leading Scientific Schools (7643.2010.3), the Division of Chemistry and Material Science of the Russian Academy of Sciences (RAS) grant (No. 5.1.1.) and the Siberian Branch RAS grant (Nos. 47 and 93).
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Petrova, M.V., Kiryutin, A.S., Savelov, A.A. et al. A Theoretical and Experimental Study of NMR Contrasting Properties of Nanocomposites Based on Ferric Oxides Stabilized by Arabinogalactan Matrix. Appl Magn Reson 41, 525–536 (2011). https://doi.org/10.1007/s00723-011-0241-5
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DOI: https://doi.org/10.1007/s00723-011-0241-5