Search academic texts

Information × Registration Number 0215U004112, 0111U008860 , R & D reports Title Theoretical and experimental study of formation peculiarities of thin film and nanopowder functional materials under intense ion and laser flow. popup.stage_title Head Kiyak S.G.. Chekurin V.F, Registration Date 05-02-2015 Organization Pidstryhach Institute of Applied Problems of Mechanics and Mathematics NAS of Ukraine popup.description2 Research object - thin film and nanopowdered functional materials and multilayer structures, sensitive to intense ion and laser beam treatment. Research goal - elaboration of mathematical models of ion-beam and laser modification of materials that includes: establishing and comparative analysis of conductivity type conversion mechanisms in solid solutions CdxHg1-xTe by the ion implantation and material ion etching during the process of photosensitive structures formation for the optoelectronic devices of IR spectral region; research of laser ablation processes of metal targets during formation of nanopowdered oxide materials and structures on their basis, study of their structure and physical properties and prediction of possibility for development of high-effective gas sensors for complex gas mixtures detection. Methods: theoretical modeling of structure formation process and electrical properties of solid-state materials; experimental methods of electron-microscopy, X-ray-diffraction, Auger-spectroscopy and optical analysis methods. The works on physical and mathematical modeling of nonequilibrium processes of laser ablation of metal targets in conditions of chemically active environment and forming the structure of nanopowders was carried out. Features of formation of oxide nanopowder materials in the conditions of change thermodynamic parameters chemically active environment and laser parameters were established. Physical and chemical regularities adsorption processes on the surface of TiO2 і ZnO nanopowders were established. Discovered a high sensitivity and speed of absorption of formed surface states in nanopowdered ZnO in gas enviroment, and studied the features of the luminescent spectra. Discovered change patterns of surface electronic states by condensation of gases on ZnO nanopowders. Studied catalytic processes on the surface of ZnO nanogranules at the surface doping with precious metals (Ag, Au, Pt) and found increase in sensor sensitivity to gases. The method of silver nanoparticles ink-jet printing for the conductive traces formation of PCBs was elaborated, electrical and mechanical properties of produced structures have been researched. The electrical conductivity, surface morphology and the conductivity occurrence by thermal and laser treatment of stabilized silver colloid were studied and described. The mechanisms of electronic conductivity in the epitaxial layers CdxHg1-xTe, formed by ion implantation and ion etching were established. The influence of ion etching and ion implantation by ions of boron on admittance of metal-dielectric-semiconductor-structures based on HgCdTe structures obtained by molecular beam epitaxy were processed. Theoretical modeling of diffusion processes of defects and formation of profiles distribution concentration charge carriers in solid solutions CdxHg1-xTe during ion implantation and ion etching of material were conducted. Relaxation of the electrical parameters of radiation-affected layers formed by ion-plasma etching and ion implantation of solid solutions CdHgTe were explored and analyzed. The regularities of structure formation of electric arc coating of powder coating electric wires were explored. Peculiarities of the residual stresses formation in coatings depending on the parameters of deposition were explored and their chemical and phase compositions were investigated. It was determined that with increasing of coating thickness the stress is reduced due to cyclic heating surface during the coating that occurs after repeated passage spot spraying surface. Product Description popup.authors Бончик О.Ю. Кияк С.Г. Котлярчук Б.К. Лесюк Р.І. Попович Д.І. Похмурська Г.В. Савицький Г.В. Середницький А.С. Чекурін В.Ф. popup.nrat_date 2020-04-02 Close