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Information × Registration Number 0211U007898, 0110U005661 , R & D reports Title Research of physical properties of nanostructures of thermal sensor controls and design of principles of their forming popup.stage_title Head Voronov Sergey Alexandrovitch, Registration Date 19-10-2011 Organization National Technscal University of Ukraine "Kiev Polytechnic Institute". popup.description2 The objects of research - nanostructure thermal sensors based on metals, semiconductors, crystals A3V5 type and polar dielectrics. Purpose - to study processes in nanostructures of thermal sensors based on metals, semiconductors, crystals A3V5 type and polar dielectrics, the development of nanostructure formation of thermal sensors, investigation of technological ways to nanoscale structures, sensing elements. Research methods - methods of dielectric spectroscopy, electro-static parameters of heterostructures BaSrTiO3 (BST), LiTaO3, BaTiO3. Experimental study of pyroelectric sensors based on GaAs showed that the frequency modulation of heat flow for them should not be below 1000 Hz. Shown that GaN meets the basic requirements for materials for making transistors. Found that when choosing a method of modeling the properties of nanoscale systems should be guided by the following characteristics numerical schemes as consistency, convergence, accuracy, robustness and efficiency. Measurement of optical absorption spectra and Raman scattering showed that the temperature and annealing time ostrivtsevyh films Ag/Si affect the morphology of their surface and thus enhancing surface characteristics. The optical properties of semiconductor nanoparticles. Found that the highest level amplification of surface islands show films annealed at temperatures of about 723-823 K and for the duration of annealing 15-20 minutes. Studied the effect of giant Raman scattering, self-created film islets Ag/Si, for low concentrated solutions of colloidal nanoparticles CdSe and CdSe/ZnS as analyte. An optimal annealing time active substrates, which is 15-20 minutes. The technology of production of one-dimensional structures of BaTiO3 and BST method nanoimpryntu. These two-dimensional periodic nanostructures with a pitch 270-700 nm. As a result of etching sol-gel BST layer to a depth of 1 micron with a period of 800nm obtained smooth and almost vertical side walls. These nanoshary thickness 50-100 nm LiTaO3 by molecular epitaxy at a speed of condensation 3-5 nm/min., Stoichiometry nanosharu material - better than 15.5%, polarization - 3.2 mkKl/sm2. These periodic structures based on polar dielectrics BST and BaTiO3. Measurement of physical constants, which characterize the quality indicators of Чthese materials gave the following figures: temperaturoprovidnist 2,3Ч10-3 cm2/s and the Curie-Weiss constant 3Ч10-3 cm2/s and 2,1Ч103 K and 2,4Ч103 K respectively. The use of the work has practical value in the production of periodic nanoscale structures with controlled elemental composition to create a highly sensitive thermal sensors and circuits. Forecast assumptions about the object of study - creation of sensor devices with new properties for biology, chemistry, medicine and devices for electronics, electricity, energy and other industries. Product Description popup.authors Гордійко Наталія Олександрівна Горшков В'ячеслав Михайлович Муравов Сергій Олександрович Поплавко Юрій Михайлович Цибульський Леонід Юрійович Чурсанова Марина Валеріївна popup.nrat_date 2020-04-02 Close