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2020-10-26 12:56:00

Scientists of Zelinsky Institute synthesized superparamagnetic nanoparticles via microwave method

Recently, magnetic nanoparticles have attracted great interest: they are used to remove toxic impurities, and are applied in catalysis, electronics, and medicine. The most widely known magnetic materials are magnetite (Fe3O4) and maghemite (Fe2O3). Various methods are used to obtain magnetite/maghemite nanoparticles, such as thermal decomposition of organic precursors, solvothermal and hydrothermal approaches, combustion synthesis, and chemical precipitation. A special place among the methods for the synthesis of magnetite/maghemite nanoparticles is occupied by microwave synthesis, which makes it possible to obtain nanoparticles with a narrower size distribution, to control the shape and structure of nanomaterials, to shorten the synthesis time, and to increase the crystallinity of the synthesized nanoparticles.

Researchers from laboratory № 14 of ZIOC RAS obtained a series of monodisperse magnetite nanoparticles coated with a hydrophilic humate polyanion as a stabilizer by the microwave method. The synthesized samples possess superparamagnetic properties with enhanced saturation magnetization, and are also stable in model infusion solutions, which allows them to be considered as candidates for use in biomedicine in vivo in efficient drug delivery. The results obtained will also be useful for materials scientists as an example of obtaining hydrophilic magnetic nanoparticles with specified physical properties.



Egor M. Kostyukhin, Vera D. Nissenbaum, Evgeny V. Abkhalimov, Alexander L. Kustov, Boris G. Ershov, and Leonid M. Kustov Microwave-Assisted Synthesis of Water-Dispersible Humate-Coated Magnetite Nanoparticles: Relation of Coating Process Parameters to the Properties of Nanoparticles Nanomaterials 2020, 10, 8, 1558, DOI: 10.3390/nano10081558

Important events:

The European Academy of Sciences (Academia Europaea) was founded in 1988. It unites about four thousand globally acknowledged experts in mathematics, medicine, natural sciences, humanities, law, economy, and social and political sciences from many countries of Europe. Among its members are also European scientists who live in other regions of the world. Currently, it includes seventy two Nobel laureates and it should be highlighted that many of them were elected to the Academy before winning the Prize.
Prof Mario Pagliaro (Palermo Italy) gave two talks on June 8th and 9th.
Alexey Sukhorukov, N. D. Zelinsky Institute of Organic Chemistry, Moscow, Russia, and colleagues studied the selective reactions of in-situ generated metal azides on N,N-bis(oxy)enamines. By combining readily generated bis(oxy)enamine substrates with sodium azide and one of a variety of metal salts (including Mg, Cu, Zn, Co, and Ni), the researchers showed that the metal cation selectively alters the mechanism to favor the formation of specific organoazide products.
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