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Information × Registration Number 0216U010266, 0114U002690 , R & D reports Title Synthesis and properties of ferromagnetic nanostructures and their possible use in medicine and microwave technology popup.stage_title Head Belous Anatolii Grigorievich, Registration Date 26-12-2016 Organization V.I.Vernadskii Institute of General and Inorganic Chemistry NASU popup.description2 As a result of studies have shown the possibility slabkoahlomerovanyh synthesis of nanoparticles of ferromagnetic materials with perovskite structure (La1 xSrxMnO3) with a narrow distribution in size (40 to 50 nm). The method of deposition from a solution of diethylene glycol possibility slabkoahlomerovanyh synthesis of crystalline nanoparticles of spinel structure AFe2O4 where A - Mn, Fe, Co, Ni, Zn, whose dimensions do not exceed 2-8 nm and with a narrow distribution in size. It was established that certain mechanisms losses in super paramagnetic nanoparticles associated with excitation of eddy currents peremahnichennyam nanoparticles (Neyelivska relaxation - NR) and the Brownian relaxation make little contribution to the heating of nanoparticles under the action of an external magnetic field. For example, nanoparticles (La, Sr) MnO3 found that the main contribution to the heating of nanoparticles exposed to an external alternating magnetic field provides a mechanism Stoner-Wohlfarth (SW). It is shown that SW mechanism in super paramagnetic nanoparticles can be realized by developing nanoparticles with the block temperature close to room temperature. Developed magnetic fluid based on ferromagnetic nanoparticles synthesized aqueous solution and agarose. The tests obtained magnetic fluids in terms of experiments on creation method nanohipertermiyi tumors. It is shown that the maximum allowable dose of magnetic fluid entering directly into the tumor is significantly higher than the vein. Tests developed magnetic fluid hyperthermia as inductors on white rats showed that after exposure to an alternating magnetic field on Guerin carcinoma, which previously administered the magnetic fluid, tumor growth stopped. Conducted preclinical pharmacological studies manitnyh liquids developed on the basis of the synthesized nanoparticles that have shown the possibility of their application as inductors hyperthermia. It is shown that the developed system with the structure of spinel (AFe2O4) in the form of films, can be used to create composite microwave resonant elements for modern communication systems, whose properties can be controlled by an external magnetic field. One of the possible ways to create perestroyuvanyh resonant elements is to composite structures based on the "dielectric resonator a-Al2O3 - ferrite film." First by tape-casting was obtained composite resonant structure based on the "dielectric resonator a-Al2O3 - ferrite film with the structure of spinel NiFe2O4». Research electric control parameters obtained composite structures showed that the external magnetic field causes a shift in the resonance frequency dF = 21 MHz. Product Description popup.authors Єленіч О.В. Білоус А.Г. В'юнов О.І. Коваленко Л.Л. Соловйова К.Д. Солопан С.О. Ступін Ю.Д. Шлапа Ю.Ю. popup.nrat_date 2020-04-02 Close