http://dspace.nbuv.gov.ua:80/handle/123456789/114720 Mon, 13 Apr 2026 04:01:44 GMT 2026-04-13T04:01:44Z http://dspace.nbuv.gov.ua:80/bitstream/id/341503/ http://dspace.nbuv.gov.ua:80/handle/123456789/114720 http://dspace.nbuv.gov.ua:80/handle/123456789/120122 Author Index, Vol. 20, № 1-4 Tue, 01 Jan 2013 00:00:00 GMT http://dspace.nbuv.gov.ua:80/handle/123456789/120122 2013-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/120121 Schottky diodes based on the zinc selenide semiconductor crystals Voronkin, E. The problems of raw materials obtaining for UV detectors such as crystalline elements based on zinc selenide(ZnSe) have been discussed. Electrical parameters of these elements have been determined. Method of Schottky diodes based on ZnSe manufacturing with various metal contacts (Ni, Pt, Pd, Al) has been presented. From the current-voltage characteristics of these diodes their main characteristics have been identified: range of work, dark currents and range of light sensitivity. The comparative characteristics of the diodes have been shown. It was defined that sensitivity of the diodes with platinum contacts under ultraviolet radiation exposure in 2–3 times higher than of the diodes that have contacts from nickel and palladium. The spectral characteristics confirm the efficiency of using the Schottky diodes on the base of A₂B₆ semiconductors, particularly ZnSe, for detection of ultraviolet radiation. Tue, 01 Jan 2013 00:00:00 GMT http://dspace.nbuv.gov.ua:80/handle/123456789/120121 2013-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/120120 Dipole-exchange spin waves in a periodically layered ferromagnetic nanotube Gorobets, Y.I.; Kulish, V.V. Spin waves in a periodically layered ferromagnetic nanotube (nanotube magnetophotonic crystal) are investigated. External magnetic field is considered to be applied parallel to the nanotube symmetry axis. The linearized Landau-Lifshitz equation in magnetostatic approximation is used, taking into account the magnetic dipole-dipole interaction, theexchange interaction and the anisotropy effects. As a result, the local dispersion relation (for uniform nanotube sections), the radial wave number spectrum and the longitudinal quasi-wave number spectrum (for the entire nanotube) for spin waves in the above-described nanotube are found. From the radial wave number spectrum, limitations on the transverse-angular modes are defined. The longitudinal quasi-wave number spectrum in the "effective medium" limit is shown to have the same form as for a uniform nanotube (with averaged parameters). Tue, 01 Jan 2013 00:00:00 GMT http://dspace.nbuv.gov.ua:80/handle/123456789/120120 2013-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/120119 Microwave hydrothermal synthesis and luminescent properties of ZnWO₄ nanoparticles Yakubovskaya, A.; Tupitsyna, I.; Sofronov, D.; Vovk, O.; Katrunov, K.; Zhukov, A.; Baumer, V.; Andrushchenko, A. Nanosized crystals of zinc tungstate were synthesized by microwave-hydrothermal method under different conditions of temperature and pH of initial solutions. Emergence of the nanophase was established in temperature range of the microwave processing from 120°C to 200°C. Change in the morphology of the crystallites synthesized at 120–200°C and 6 ≤pH ≤10 units were considered. Transformation of the nanograins (size of 10 nm to 40 nm) to nanorods (length of 50 nm to 200 nm) and their enlargement occurs when temperature of the microwave processing and pH of the initial solutions rise. The relation between luminescent parameters of the nanocrystals and their morphological features was investigated. Tue, 01 Jan 2013 00:00:00 GMT http://dspace.nbuv.gov.ua:80/handle/123456789/120119 2013-01-01T00:00:00Z