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Список видань за алфавітом назв: Авторський покажчик Покажчик назв публікацій  |
Пошуковий запит: (<.>A=Emelyanov S$<.>) | ||||
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Загальна кількість знайдених документів : 24 Представлено документи з 1 до 20 |
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| 1. | 
Chekadanov A. S. Small Angle X-ray Scattering in Thin Iron Films [Електронний ресурс] / A. S. Chekadanov, A. P. Kuzmenko, S. G. Emelyanov, L. M. Chervyakov, M. B. Dobromyslov // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03023-1-03023-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_25 By small angle X-ray scattering (SAXS) and atomic force microscopy characteristic sizes are determined, structural features of thin iron films deposited by magnetron evaporation onto substrates from pyroceramics are established. It is shown that morphologically the film is characterized by disorder. It is formed from columnar nano crystallites that are oriented either perpendicular to the substrate or situated in its plane, which dictates polydispersity of those coatings. It is shown that SAXS may be thought of as nondestructive technique for analyzing structure and composition and conducting quality control of magnetron films. | |||
| 2. |
Chan N. A. Synthesis of the Carbon Nanomaterials Based on Renewable Bioresources [Електронний ресурс] / N. A. Chan, V. V. Chakov, A. P. Kuzmenko, S. G. Emelyanov, L. M. Chervyakov, M. B. Dobromyslov // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03026-1-03026-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_28 The effectiveness and feasibility of producing nanoscale carbon materials from renewable bioresources were shown as an example marsh mass. The mechanisms of synthesis of amorphous organic carbon from sphagnum moss species modified by a liquid peat phase of humic nature are discussed. A fundamentally new way of producing carbon nanotubes by mechanical activation of amorphous organic carbon is described. | |||
| 3. |
Rodionov V. V. Microwave Properties of Carbon Nanotubes Grown by Pyrolysis of Ethanol on Nickel Catalyst [Електронний ресурс] / V. V. Rodionov, A. P. Kuzmenko, S. G. Emelyanov, L. M. Chervyakov, M. B. Dobromyslov // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03037-1-03037-2. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_39 The efficiency of carbon nanotubes produced by CVD-method on a nickel catalyst at a protection from microwave radiation is shown. These data are confirmed by scanning electron microscopy, energy dispersive X-ray analysis and spectral analysis of the microwave radiation in the frequency range 26 - 40 GHz. The observed value of the transmission coefficient S21, up to - 42,7 dB, is in agreement with considered possible absorption mechanisms of electromagnetic wave energy in carbon nanoscale systems "CNT-nickel nanoparticles. The application of carbon powder materials in shielding of electromagnetic radiation has been theoretically justified. | |||
| 4. |
Kozhitov L. V. The Structure and Magnetic Properties Metal-carbon Nanocomposites NiCo / C on Based of Polyacrylonitrile [Електронний ресурс] / L. V. Kozhitov, D. G. Muratov, S. G. Emelyanov, V. G. Kostishin, E. V. Yakushko, A. G. Savchenko, I. V. Schetinin, E. P. Mosyakina // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03040-1-03040-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_42 For the first time in the conditions of the IR pyrolysis precursor based on polyacrylonitrile, cobalt acetate and acetylacetonate iron (ratio of metals in precursors Fe:Co = 3:1) metal-carbon nanocomposites have been obtained, which are carbon matrix with graphite-like structure, containing buried her nanoparticles of intermetallids of FeCo. It is shown that the phase formation FeCo occurs in the temperature range of obtaining 500 - 600 degrees centigrade, at <$ET~symbol Г ~500> degrees centigrade are only two distinct phases metals: HCC-With and BCC Fe. In the structure of nanocomposites obtained at <$ET~symbol У~600> degrees centigrade, at the same time there are nanoparticles of intermetallides and FeCo little content phase fсс-Co or solid solution of cobalt. It is determined that the composition of a metal component nanocomposite satisfies the ratio of Fe, Co, originally specified.By method of IR-pyrolysis the precursor of polyacrylonitrile and compounds of cobalt and nickel metalcarbon nanocomposites were obtained, representing nanoparticles of alloy NiCo, dispersed in nanocrystalline carbon matrix. Identification of alloy nanoparticles was carried out by the values of the lattice parameter, which was determined by X-ray analysis and was 0,3533 nm (values of the lattice parameter for Ni 0,3529 nm), this corresponds intermetallics Ni | |||
| 5. |
Kosushkin V. G. Crystal Growth Mechanism in" Synthesis-solute-diffusion" Method in Ultrasonic Field [Електронний ресурс] / V. G. Kosushkin, S. L. Kozhitov, S. G. Emelyanov, Yu. N. Parkhomenko, L. V. Kozhitov // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03042-1-03042-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_44 Features crystal growth method "synthesis-solute-diffusion" when applied ultrasonic field are considered. Dependence of the crystal optical transmission heterogeneity frequency ultrasonic vibrations determined. System Tests showed that the optimal vibration frequency that provided a homogeneous crystals and permitting the maintenance of the solidification front in a predetermined position with an accuracy of <$Esymbol С~5~%> frequency is 4 MHz <$Esymbol С~5>. Comparison of the optimum frequency ultrasonic vibrations to increase uniformity in the mode of crystals convective transport under the Czochralski method and conditions of diffusive transfer method indicates a significant difference between these frequencies, i.e. character determines the transfer conditions of optimization process. | |||
| 6. |
Kosushkin V. G. Gallium Arsenide Czokhralski Crystal Growth with High Oscillatory Influences [Електронний ресурс] / V. G. Kosushkin, S. L. Kozhitov, S. G. Emelyanov, Yu. N. Parkhomenko, L. V. Kozhitov // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03043-1-03043-2. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_45 The influence of ultrasound introduced into the melt during the growth of single crystals of gallium arsenide. Ultrasonic vibrations had a frequency of 820 kHz and amplitude of 0,1 - 0,2 micrometer. Found an increase in the homogeneity of impurity distribution of the bands growth without change of the dislocation structure of single crystals. In the simulation result of the ultrasonic wave interaction with the melt in the crucible on the basis of the theory of formation of phases is established that nucleation rate associated with the frequency and amplitude of the ultrasonic vibration acting on the melt. | |||
| 7. |
Emelyanov S. G. Induction of Polymerization of the Surface Nanostructures of the Electrodes by Electric Field [Електронний ресурс] / S. G. Emelyanov, A. E. Kuz’ko, A. V. Kuz’ko, A. P. Kuzmenko, P. A. Belov // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03057-1-03057-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_59 | |||
| 8. |
Emelyanov S. G. Study of Capacitive and Electrical Conductivity Characteristics of the System "Nanostructured Electrodes - Dielectric Liquid" [Електронний ресурс] / S. G. Emelyanov, A. E. Kuz'ko, A. V. Kuz'ko, P. A. Ryapolov // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03058-1-03058-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_60 The results of research of capacitive and conductive characteristics of the system "the nanostructured metal electrodes - dielectric liquid" are given. It is shown the difference of states near the electrodes of electric double layers on the surfaces of copper and tungsten electrodes. | |||
| 9. |
Polunin V. M. Restriction of Helmholtz Model [Електронний ресурс] / V. M. Polunin, S. G. Emelyanov, I. A. Schabanova, P. A. Ryapolov, Min Tan Myo, G. V. Karpova, T. I. Aksenova // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03072-1-03072-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_74 The results of the experimental studies of physical mechanisms of energy dissipation in the oscillating system in which air cavity held by the forces of magnetic levitation is used as the elastic element, and magnetic fluid prepared on the basis of dispersing media with different viscosity level is used as the inertial element are considered in the article. Based on the obtained results the conclusion on the restriction of the applicability of Helmholtz equation, caused by boundary effects is made. | |||
| 10. | 
Kozhitov L. V. The Synthesis of Metalcarbon Nanocomposite Ni / C on the Basis of Polyacrylonitrile [Електронний ресурс] / L. V. Kozhitov, D. G. Muratov, E. V. Yakushko, S. L. Kozhitov, A. G. Savchenko, I. V. Shchetinin, S. G. Emelyanov, L. M. Chervjakov // Journal of Nano- and Electronic Physics. - 2013. - Vol. 5, № 4(1). - С. 04007-1-04007-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnep_2013_5_4(1)__9 Metalcarbon nanocomposites based on polyacrylonitrile and nickel chloride are synthesized under the influence of infrared heat. The resulting materials represent a system of carbon matrix formed during the carbonization of PAN, and distributed in it nickel nanoparticles. The average size of the nanoparticles in the nanocomposite was 15 - 25 nm. It was found that the distribution of nickel nanoparticles sizes is determined by temperature synthesis nanocomposite. Thus with increasing temperature, the predominant average particle size of the metal increases, and the distribution is spread and shifted toward larger sizes. | |||
| 11. |
Kozhitov L. V. The Structure and Content Peculiarities of Carbon Material Obtained under the Polyacrylonitrile Infra-red Heating [Електронний ресурс] / L. V. Kozhitov, N.Ch. V’et, V. V. Kozlov, S. G. Emelyanov // Journal of Nano- and Electronic Physics. - 2013. - Vol. 5, № 4(1). - С. 04020-1-04020-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnep_2013_5_4(1)__22 It is first determined by the semiempirical quantum chemical model MNDO for a carbon material (CM) structure based on polyacrylonitrile (PAN) heat-treated that the increase of a content N from 14 to 18 atoms in CM monolayers C46N14H10, C44N16H12, and C42N18H14 and a content H from 12 to 22 atoms in CM monolayers C44N16H12 and C44N16H22 leads to the decrease of the binding energy (EB) from 7,40; 7,12 to 6,88 and 6,25 eV, respectively; and to the increase of the differences between the maximum and minimum bond lengths (DELTA l), between the maximum and minimum valence angles (DELTA THETA), and between the maximum and minimum local charges (DELTA q) from 0,176 angstram; 12,0o, and 0,487 to 0,238 angstram; 20,8o, and 0,613, respectively, and promotes the CM structure curvature. Quantum chemical simulation results are confirmed by the element analysis of CM samples and a nanocomposite FeNi3/C. As the IR heating temperature is increased from 30 to 500o C, concenrations N (СN) and H (CH) in the CM and nanocomposite FeNi3/C are decreased from 27 to 18 and 10 wt % and from 6 to 1 and 0,5 wt %, respectively. | |||
| 12. |
Emelyanov S. Mechanisms of Microwave Absorption in Carbon Compounds from Shungite [Електронний ресурс] / S. Emelyanov, A. Kuzmenko, V. Rodionov, M. Dobromyslov // Journal of Nano- and Electronic Physics. - 2013. - Vol. 5, № 4(1). - С. 04023-1-04023-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnep_2013_5_4(1)__25 According to SEM, X-ray phase analysis, Raman scattering data features of nanostructural changes in shungite carbon structure were found when processing shungite in 52 % hydrofluoric acid. It is found that conductivity increases up to the values of electrical graphite and absorption of microwave radiation also increases at frequencies up to 40 GHz, which, along with dielectric losses, is due to intense processes of both scattering at laminar carbon structures and absorption of electromagnetic energy. | |||
| 13. |
Emelyanov S. G. From the Dynamic Demagnitizing Factor to the Heat Capacity of a Nanodispersed Magnetic Fluid [Електронний ресурс] / S. G. Emelyanov, V. M. Polunin, A. O. Tantsyura, A. M. Storozhenko, P. A. Ryapolov // Journal of Nano- and Electronic Physics. - 2013. - Vol. 5, № 4(1). - С. 04027-1-04027-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnep_2013_5_4(1)__29 A technique for the measurement of the dynamic demagnetizing factor, used for the description of magnetic fluid magnetization disturbance caused by a sonic wave has been offered. The formula for the calculation of heat capacity Cp of the synthesized magnetic colloids, which includes the parameter Nd has been obtained. | |||
| 14. |
Kurochka A. Features of Ion-Electronic Emission from Surface of Semiconductors [Електронний ресурс] / A. Kurochka, A. Sergienko, S. Kurochka, V. Kolybelkin, S. G. Emelyanov, E. V. Yakushko, L. M. Chervjakov // Journal of Nano- and Electronic Physics. - 2013. - Vol. 5, № 4(1). - С. 04036-1-04036-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnep_2013_5_4(1)__38 The results of the research value of the current of the secondary electrons in the ion-beam etching of various semiconductors. Shows the setup and electrical circuit of the experiment. An experimental study to determine the dependence of the current of the secondary electrons from the band gap Eg and the height of the potential barrier (electron affinity) echi. It is shown that in the conditions of ion-beam etching of the semiconductor is the penetration of the electric field, which leads to a shift of the energy levels of electrons in the surface layer. Found that the ion-electronic signal emission silicon n-type is higher than the p-type silicon. | |||
| 15. |
Emelyanov S. G. Opportunities of AFM in the Description of Charge Formation from the Nanostructured Electrode at Electroconvection [Електронний ресурс] / S. G. Emelyanov, A. E. Kuz'ko, A. V. Kuz'ko, A. P. Kuzmenko, D. I. Timakov // Journal of Nano- and Electronic Physics. - 2013. - Vol. 5, № 4(1). - С. 04040-1-04040-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnep_2013_5_4(1)__42 The results of research of opportunities of the description of a charge formation from surfaces of the nanostructured electrodes on their ASM-topology are given. The estimation of influence of the sizes of a cantilever on the calculated currents is made. | |||
| 16. | 
Panko E. A. The determination of the morphological types of galaxy clusters using cluster cartography [Електронний ресурс] / E. A. Panko, S. I. Emelyanov // Odessa astronomical publications. - 2015. - Vol. 28(2). - С. 135-136. - Режим доступу: http://nbuv.gov.ua/UJRN/oap_2015_28_2_11 | |||
| 17. |
Muratov D. G. The Influence of Synthesis Temperature on the Structure, Composition and Magnetic Properties of Nanocomposites NiCo/C [Електронний ресурс] / D. G. Muratov, L. V. Kozhitov, S. G. Emelyanov, E. V. Yakushko, M. F. Bulatov // Журнал нано- та електронної фізики. - 2015. - Т. 7, № 4. - С. 04071-1-04071-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2015_7_4_73 By method of IR-pyrolysis the precursor of polyacrylonitrile and compounds of cobalt and nickel metalcarbon nanocomposites were obtained, representing nanoparticles of alloy NiCo, dispersed in nanocrystalline carbon matrix. NiCo/C nanocomposites are ferromagnets. Magnetization and the coercive force depends on the size and composition of the alloy nanoparticles NiCo. The average size of metal nanoparticles is determined by the synthesis temperature and in range of 350 - 800 °C is 10 - 80 nm, respectively. According to the results of TEM it was detected that with increasing synthesis temperature the maximum synthesis of nanoparticles size distribution shifts to larger sizes. The magnetization and coercivity depend on the size and composition of the nanoparticles of alloy NiCo. With increasing synthesis temperature from 350 to 800 °C the magnetization increases from 0,055 to 17 A · m2/ kg. | |||
| 18. |
Kuzmenko A. P. Nanostructure Changes of Magnetron Copper Films with a Glass Ceramic Substrate [Електронний ресурс] / A. P. Kuzmenko, A. E. Kuzko, Dint Naw, M. M. Than, M. B. Dobromyslov, S. G. Emelyanov, L. M. Chervyakov // Журнал нано- та електронної фізики. - 2015. - Т. 7, № 4. - С. 04095-1-04095-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2015_7_4_97 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. | |||
| 19. |
Kozhitov L. V. The Formation and Study of the FeCo Nanoparticles Alloy in Structure of Metal-Carbon Nanocomposites FeCo/C [Електронний ресурс] / L. V. Kozhitov, M. F. Bulatov, V. V. Korovushkin, V. G. Kostishin, D. G. Muratov, M. N. Shipko, S. G. Emelyanov, E. V. Yakushko // Журнал нано- та електронної фізики. - 2015. - Т. 7, № 4. - С. 04103-1-04103-5. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2015_7_4_105 The study of the peculiarities of the formation of the nanoparticles FeCo-alloy in the composition of metal-carbon nanocomposites FeCo/C. Structure, phase composition and kinetic processes of synthesis of nanocomposites FeCo/C by methods of Mossbauer spectroscopy were studied. This allowed us to establish the peculiarities of formation of nanoparticles FeCo alloy in the composition of the nanocomposites. The nanocomposites were synthesized by the IR-pyrolysis at temperatures of precursors of 300 - 800 °C on the basis of polyacrylonitrile (PAN), iron acetylacetonate and cobalt acetate. Also it is established that an increase in the average size of nanoparticles FeCo with increasing temperature synthesis is occurred. In the temperature range of synthesis of 600 - 800 °C the size varies from 9 - 10 to 16 - 18 nm, respectively. The features the phase transitions and phase composition of the metal-carbon nanocomposites FeCo/C were studied by Mossbauer spectroscopy. Nanocomposites were synthesized in the temperature range of T = 300 - 800 °C. It was shown that the samples synthesized at T = 300 °C contains of superparamagnetic nanoparticles of magnetite and amorphous oxide of iron only. The process of forming nanoparticles of alloy FeCo occurs within the temperature range 500 - 600 °C due to the recovery of amorphous iron oxide and magnetite as well as them dissolving in a phase of cobalt. The growth of size of nanoparticles of alloy by agglomeration and dissolution of iron in the alloy nanoparticles occurs only at the temperature range of synthesis 600 - 800 °C. This is confirmed by a decrease of the content of Fe, which associated with carbon and it is consistent with the results of phase and structural studies, carried out in previous works. | |||
| 20. |
Muratov D. G. Synthesis of Nanoparticles of Fe-Co-Ni Three-component Alloy Capsulated into Carbon Matrix of Fe-Co-Ni/C Nanocomposites [Електронний ресурс] / D. G. Muratov, L. V. Kozhitov, S. G. Emelyanov, A. V. Vasilyev, A. V. Popkova, A. A. Pavlova // Журнал нано- та електронної фізики. - 2016. - Т. 8, № 3. - С. 03037-1-03037-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2016_8_3_39 Nanoparticles of Fe - Co - Ni three-component alloy capsulated into carbon matrix were synthesized. Structure, phase composition and magnetic properties of obtained materials were defined by diffractometry and magnetometry. It was established that composition of nanoparticles is determine by synthesis temperature, because nanoparticles of three-component alloy are forms by dissolution of cobalt in Fe - Ni alloy. Magnetization of Fe - Co - Ni/C nanocomposites and coercive force increases from 26 up to 58 A · m2/ kg during temperature increase that relates with growth of particles size and increase of cobalt content in the alloy. | |||
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