Періодичні видання СумДУ
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Item Nanostructured Lead Compounds in Electrode Materials of a Lead-Acid Battery(Sumy State University, 2016) Kuzmenko, A.P.; Grechushnikov, E.A.; Kharseev, V.A.; Dobromyslov, M.B.; Rusanov, P.A.The nanostructure and phase composition of the electrode material of lead-acid batteries, formed by chemical transformations with involvement of sulfuric acid solutions of various concentrations, water and carbon dioxide have been studied.Item Piezoelectric Properties of Barium Titanate Langmuir Films(Sumy State University, 2016) Kuzmenko, A.P.; Chuhaeva, I.V.; Abakumov, P.V.; Dobromyslov, M.B.Langmuir films from stabilized barium titanate nanoparticles have been produced. The processes of polarization and polarization reversal of ferroelectric coatings obtained were studied. The inverse piezoelectric effect has been recorded and its quantitative characteristics have been determined.Item The Photoluminescence Properties of Ablated ZrO[2] Nanoparticles(Sumy State University, 2016) Kuzmenko, A.P.; Pugachevsky, M.A.; Dobromyslov, M.B.The method of optical spectroscopy determined photoluminescence properties of zirconia nanoparticles produced by laser ablation. The effect of annealing of nanoparticles in the range from 400 to 1000 °C on their luminescence is investigated. It is shown that the emission of the luminescence make it possible to conclude about the type of defects in the structure of nanoparticles and their dynamics during annealing. A qualitative explanation of the detected patterns is provided.Item Structure of Carbon Nanotubes in Colloidal Solutions under the Influence of a Constant Electric Field(Sumy State University, 2016) Kuzmenko, A.P.; Thet Phyo, Naing; Kuzko, A.E.; Myo Min, Than; Kutsenko, A.V.; Dobromyslov, M.B.Processes of self-organization in diffusive and limited conditions of colloidal solutions of carbon nanotubes under the influence of constant electric fields are studied. It is established that functionalized MCNT – COOH in a drop of colloidal solution is oriented in an electric field in a controllable way, which is of great practical value.Item Degradation of Structure of Magnetron Ni and Cr Nanofilms at their Heating on Air(Sumy State University, 2016) Kuzmenko, A.P.; Kuzko, A.E.; Naw, Dint; Myo Min, Than; Dobromyslov, M.B.; Kanukov, R.T.The present results of comprehensive researches of degradation processes for magnetron metal nanofilms of Ni and Cr when heated on air (373-1273 K) conducted by nanotechnology instruments. Temperatures of structural and phase transformations, interrelation of amplitude and phase-frequency components of ellipsometry measurements with "ferromagnetic-antiferromagnetic" for NiO phase transition are establishedItem Influence of the Substrate Temperature on the Size Distribution and Phase Composition of Ablated HfO2 Nanoparticles(Sumy State University, 2015) Panfilov, V.I.; Pugachevskii, M.A.; Kuzmenko, A.P.; Dobromyslov, M.B.The influence of the substrate temperature on the formation of high-temperature phases of hafnium dioxide in the process of pulsed laser ablation is investigated. It is established that the HfO2 nanoparticles of the high-temperature tetragonal and cubic phases with a quantitative content up to 50 % are formed on the surface of the substrate at room temperature during the laser ablation with intensity of 1010 W/m2. It is shown that with increasing the substrate temperature the average size of the ablated nanoparticles decreases and the quantitative content of the high-temperature phases is increased up to 70 %.Item Nanostructure Changes of Magnetron Copper Films with a Glass Ceramic Substrate(Sumy State University, 2015) Kuzmenko, A.P.; Kuzkо, A.E.; Dint, Naw; Than, Myo Min; Dobromyslov, M.B.; Emelyanov, S.G.; Chervyakov, L.M.The present paper deals with the results of comprehensive research of heated in the air magnetron copper films by atomic-force and scanning electron microscopy, Raman scattering, IR-Fourier and X-Ray phase analysis, and spectral ellipsometry. According to the results of nano techniques, the relationship between amplitude and phase-frequency components of ellipsometric measurements and phase structure transformations has been established. The structural transition in the vicinity of 573 K, has been found.Item The Hydrothermal Autoclave Synthesis of the Nanopowders of the Refractory ZrO2 and HfO2 Oxides(Sumy State University, 2015) Karpovich, N.F.; Pugachevsky, M.A.; Panfilov, V.I.; Kuzmenko, A.P.; Dobromyslov, M.B.The nanopowders of the transition metal ZrO2 and HfO2 oxides were obtained by the hydrothermal autoclave synthesis. The nanoparticles possess a rounded shape and a size range of 40 to 80 nm (ZrO2), of 10 to 40 nm (HfO2). X-ray diffraction analysis and electron microscopy show that the structure of the nanoparticles is monoclinic.Item Nonlinear Effects of Laser Surface Modification of Ore Minerals(Sumy State University, 2015) Leonenko, N.A.; Vanina, E.A.; Veselovа, E.M.; Kuzmenko, A.P.The effect of continuous laser radiation on complex ore minerals objects containing gold, not extracted by monerd methods was investigated. It was established the formation of different structural surfaces of gold, revealed general patterns of sintering and concentration of sub-micron gold.Item Temperature Influence on the Properties of Thin Si3N4 Films(Sumy State University, 2015) Zakhvalinskii, V.S.; Abakumov, P.V.; Kuzmenko, A.P.; Chekadanov, A.S.; Piljuk, E.A.; Rodriguez, V.G.; Goncharov, I.J.; Taran, S.V.Applying Raman spectroscopy, small-angle x-ray scattering, and atomic force microscopy it were studied phase composition and surface morphology of nanoscale films Si3N4 (obtained by RF magnetron sputtering).