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Information × Registration Number 0217U001220, 0114U000130 , R & D reports Title Formation and diagnostics of nano- and micro-sized objects and structures and their effect on medium popup.stage_title Head Denysenko Igor Borysovych, Доктор фізико-математичних наук Registration Date 31-01-2017 Organization Kharkov National University named after V.N. Karazin popup.description2 The research object: vertically aligned single-walled carbon nanotubes; a carbon film formed on a substrate with growing nanotubes; charged and neutral particles in the non-stationary dusty plasma; electromagnetic waves falling onto layered plasma and plasma-like structures; gas discharges and elementary processes in them; solid objects, including micro- and nanomaterials, under the action of ionizing radiation. The research aims: development of new theoretical and experimental data about: - the impact of a gas discharge plasma parameters on the characteristics of the forest of single-walled carbon nanotubes; - properties of non-stationary dusty plasma, where argon is a working gas, as well as in the presence of molecular working gases; - the effect of parameters of plasma and plasma-like layered structures and of wave parameters on the transmission and reflection of p- polarized waves; - the impact of the size of objects on the luminescence spectra; - determination of the emission mechanisms of solid objects; - determination of the effect of prolonged exposure onto the emitted light spectrum. Research methods - theoretical analysis, numerical computer simulation, experiments to study the emission of solid objects at irradiation by ionizing radiation, mathematical processing of the experimental results. The results of study of non-stationary dusty plasma and the processes taking place in the discharge chamber and on the substrate during formation of carbon nanostructures are: new theoretical models of non-stationary dusty plasma in the presence of molecular working gases (acetylene, oxygen) are developed; theoretical models of unsteady argon dusty plasma, developed before by the authors, are improved; new knowledge about the processes of charging and discharging of dust particles, particle's transport and energy generation and losses of electrons, ions and neutral particles in non-stationary dusty plasma is obtained; a new theory of formation of single-walled carbon nanotubes in discharge chambers is developed; new effective schemes for numerical simulation and numerical codes to study nonstationary dusty plasma, as well as for simulation of processes occurring during the formation of vertical single-walled carbon nanotubes in plasma are developed; new methods and recommendations for the control of formation of the hydrocarbon dust particles in discharge chambers and of the vertical carbon nanostructures at the bottom of the discharge chamber are obtained; the results of theoretical studies are compared with experimental data of the leading world scientific centers. We also studied peculiarities of transmission of p-polarized electromagnetic waves through plasma and plasma-like layered structures. The results of experimental studies of solid objects glow at ionizing radiation explosion are: new experimental data which significantly improve the methodology of monitoring the properties of substances, developed before by the authors, are obtained; new data concerning the irradiated sample size effect on the emission spectra under the influence of ionizing radiation are obtained; experimental data on the connection between the dynamics of a solid state defects and the properties of the light emission spectra are obtained. Product Description popup.authors Є. Бабенко І. Денисенко І. Марущенко А. Котляр В. Галайдич В. Денисенко В. Журенко Г. Бурмака М. Азарєнков Н. Попенко О. Гапон О. Заславський О. Чібісов С. Івко Т. Гірка Т. Малихіна popup.nrat_date 2020-04-02 Close