A.S. Romanyuk

Structural rearrangements of Shungite-carbon nanoparticles under microarc oxidation of aluminum alloys

Наталья Николаевна Рожкова, Анна Аркадьевна Ковальчук, Sergey S. Rozhkov, Marcin Frycz et autres

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Study of the Crack Resistance of Microarc Oxidation Coatings after Laser Doping with Zirconium Oxide

Vasilina A. Lapitskaya, Т. А. Кузнецова, С. А. Чижик, Aleksandr I. KOMAROV et autres

Abstract In this paper we present the results of a study of crack resistance of a microarc oxidation coating (MAO) after laser doping with zirconium oxide. Crack resistance was determined by indentation with imprint imaging using atomic force microscopy. Laser doping with …

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The Photoluminescence Properties of CuInS2 and AgInS2 Nanocrystals Synthesized in Aqueous Solutions

Lyudmyla V. Borkovska, A.S. Romanyuk, V. V. Strelchuk, Yu. Polishchuk et autres

The CuInS2 and AgInS2 are the low-toxic semiconductor materials with direct band gap and high absorption coefficient in the visible and near-infrared regions. The nanocrystals (NCs) based on these materials demonstrate enhanced photoluminescence (PL) tunable over the whole visible spectral range resulting …

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The Photoluminescence Properties of CuInS2 and AgInS2 Nanocrystals Synthesized in Aqueous Solutions

Lyudmyla V. Borkovska, A.S. Romanyuk, V. V. Strelchuk, Yu. Polishchuk et autres

The results of investigations of the AgInS2 and CuInS2 nanocrystals (NCs) by the photoluminescence (PL), PL excitation (PLE), optical absorption, Raman scattering and X-ray diffraction (XRD) methods are presented. The NCs were synthesized under stoichiometric conditions in aqueous solutions in the presence …

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Optical characterization of the AgInS2 nanocrystals synthesized in aqueous media under stoichiometric conditions

Lyudmyla V. Borkovska, A.S. Romanyuk, V. V. Strelchuk, Yu. Polishchuk et autres

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Influence of annealing in Zn vapor on the luminescence of MgZnO ceramics

И. В. Маркевич, T. Stara, О.F. Kolomys, A.S. Romanyuk et autres

Abstract ZnO‐based compounds that exhibit a number of strongly overlapping emission bands in visible spectral region are promising materials for white‐light emitters with continuous emission spectrum. Defect‐related emission in doped with different impurities ZnO, however, spreads from green to red spectral region, …

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Spatial distribution of free carrier concentration in vertical GaN Gunn‐diode structures studied by confocal micro‐Raman spectroscopy and Kelvin probe force microscopy

V. V. Strelchuk, Andrii S. Nikolenko, P. M. Lytvyn, A.S. Romanyuk et autres

Abstract Scanning confocal micro‐Raman and PL spectroscopy, Kelvin probe force microscopy (KPFM) and electrostatic force gradient microscopy (EFGM) were applied to study the concentration profiles of free carriers by scanning the cleaved edge along the growth direction of vertical n+/n0/n+‐GaN Gunn‐diode structure. …

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Modeling the drift properties of gas mixtures of a GasPixel detector for upgrading the ATLAS setup

A. S. Boldyrev, A.S. Romanyuk, S. Yu. Smirnov, V. O. Tikhomirov

The results of modeling the drift properties of gas mixtures for a GasPixel detector that would provide highly accurate track data at high luminosity values in the inner detector of the ATLAS setup at the Super LHC collider are presented.

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Depth profiling of strain and carrier concentration by cleaved surface scanning of GaN Gunn-diode: confocal Raman microscopy

Alexander E. Belyaev, V. V. Strelchuk, Andrii S. Nikolenko, A.S. Romanyuk et autres

Depth profiling of strain and carrier concentration by cleaved surface scanning of GaN Gunn-diode: confocal Raman microscopy, Belyaev, A E, Strelchuk, V V, Nikolenko, A S, Romanyuk, A S, Mazur, Yu I, Ware, M E, DeCuir, E A, Salamo, G J

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The ATLAS transition radiation tracker

A. S. Boldyrev, В. Г. Бондаренко, V. Bychkov, B. A. Dolgoshein et autres

The transition radiation tracker of the ATLAS setup, which is one of the two multipurpose detectors at the Large Hadron Collider (LHC), its design, and the tasks it performs are described. The tracker is fully assembled and commissioned. The first physical results …

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Submicron Raman and photoluminescence topography of InAs/Al(Ga)As quantum dots structures

О.F. Kolomys, V. V. Strelchuk, Т. С. Шамирзаев, A.S. Romanyuk et autres

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High pressure xenon gamma-spectrometers with high energy resolution

В. В. Дмитренко, V.M. Gratchev, O. N. Kondakova, Sergei V. Krivov et autres

The results of studies of the High Pressure Xenon (HPXe) gas as a detector medium for gamma-ray spectrometers are presented. The designs of the high-pressure Xe spectrometers and their parameters are given. The spectrometers based on parallel plate and cylindrical ionization chambers …