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Information × Registration Number 0213U006808, 0112U004238 , R & D reports Title Synthesis, structural features and properties of ferromagnetic core / shell nanostructures popup.stage_title Head Belous Anatolii Grigorievich, Registration Date 02-01-2014 Organization V.I.Vernadskii Institute of General and Inorganic Chemistry NASU popup.description2 Synthesized nanoparticles with spinel structure based AFe2O4 (A = Mn, Fe, Co, Ni, Zn) by deposition of non-aqueous solutions of diethylene glycol and proved that after the synthesis is the formation of crystalline self-agglomerated particles whose dimensions do not exceed 2-8 nm and have a narrow size distribution. The synthesis of core/shell structures with different thickness Fe3O4/CoFe2O4 shell (shell) - 1, 2.5 and 3.5 nm in non-aqueous solutions of diethylene glycol . It is shown that the synthesized core/shell structure is crystalline, self-agglomerated characterized by a narrow size distribution and their size can be controlled . Studied the magnetic properties over a wide temperature range for nanoparticles AFe2O4 (A = Mn, Fe, Co, Ni, Zn) and core / shell structures. Found that all the synthesized nanoparticles at 300 K characterized by high saturation magnetization and low values of coercivity and saturation magnetization dependence on the applied magnetic field is described by the Langevin function , which indicates that they are superparamagnetic properties. Developed magnetic fluid based on aqueous solutions of agarose and synthesized nanoparticles AFe2O4 (A = Mn, Fe, Co, Ni, Zn) and core/shell structures. It is shown that the magnetic fluid are stable over time and not stratified. Established that nanoparticles individual compounds AFe2O4 (A = Mn, Fe, Co, Ni, Zn) are characterized by low values of specific energy losses SLP, ie they weakly heated under external electromagnetic fields. At the same time, the core / shell structures Fe3O4/CoFe2O4 there is a significant absorption of external electromagnetic field, resulting in a significant increase in the value SLP. Therefore designed core/shell structure and magnetic fluids based on them can be recommended for use in the treatment by hyperthermia. Product Description popup.authors Єленіч Олександр Вікторович Білоус Анатолій Григорович Вьюнов Олег Іванович Кобилянська Софія Дмитрівна Плутенко Тетяна Олександрівна Солопан Сергій Олександрович Ступін Юрій Дмитрович popup.nrat_date 2020-04-02 Close