Anisometric Iron Oxide-Based Nanoparticles and Sols Based on Them: Preparation and Properties

被引:0
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作者
S. V. Stolyar
O. A. Bayukov
L. A. Chekanova
Y. V. Gerasimova
A. E. Sokolov
R. S. Iskhakov
R. N. Yaroslavtsev
M. N. Volochaev
A. S. Artemyeva
E. V. Cheremiskina
Y. V. Knyazev
机构
[1] Siberian Federal University,Krasnoyarsk Scientific Center
[2] Federal Research Center KSC SB RAS,Kirensky Institute of Physics
[3] Federal Research Center KSC SB RAS,undefined
关键词
Nanoparticles and nanorods; Chemical preparation; Superparamagnetism;
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学科分类号
摘要
We have synthesized magnetic powders of the magnetite-maghemite series by the chemical reaction of the FeSO4 iron salt and the natural arabinogalactan polysaccharide. These particles with a high magnetization value (∼ 300 Gs) represent a mixture of spherical particles and nanorods. Particles of a spherical shape (diameter of ∼ 5–6 nm) show a superparamagnetic behavior at room temperature, while rods with a diameter of ∼ 5 nm and a length of 30 nm are magnetic. We have prepared sol samples based on the nanoparticle aqueous solution of arabinogalactan. Our results on the magnetism of the circular dichroism (MCD) on sol are consistent with the of Mössbauer spectroscopy data.
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页码:971 / 975
页数:4
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