Search Results - "SHPOTYUK, O"

Critical remark on the FSDP-related correlations in chalcogenide glasses as treated in the paper [Alekberov RI, Isayev AI, Mekhtiyeva SI, Fábián M. Local structures and optical properties of As-Se-Te(S) chalcogenide glasses. Phys B: Condens Matter 2018; 550: 367–375] by Shpotyuk, O.

“…In the paper [Phys. B 550 (2018) 367–375], Alekberov, Isayev, Mekhtiyeva and Fábián have performed very erroneous calculation on diameter of voids responsible…”
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PAL spectroscopy of rare-earth doped Ga–Ge–Te/Se glasses by Shpotyuk, Ya, Ingram, A., Shpotyuk, O.

“…Positron annihilation lifetime (PAL) spectroscopy was applied for the first time to study free-volume void evolution in chalcogenide glasses of Ga–Ge–Te/Se…”
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Cluster modeling of nanostructurization-driven reamorphization pathways in glassy arsenoselenides: a case study of arsenic monoselenide g-AsSe by Shpotyuk, O., Hyla, M., Boyko, V., Shpotyuk, Y., Balitska, V.

“…Nanostructurization-driven reamorphization pathways in glassy arsenic monoselenide g-AsSe originated from both realgar- and pararealgar-type As 4 Se 4…”
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Combined configuration-enthalpy model describing radiation-optical responses in chalcogenide semiconductor glasses by Shpotyuk, M., Shpotyuk, O., Balitska, V.

“…Combined configuration-enthalpy model evolving free energy configuration-coordinate and thermodynamic enthalpy diagrams is developed to describe the…”
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Evolution of porous structure and free-volume entities in magnesium aluminate spinel ceramics by Klym, H., Ingram, A., Hadzaman, I., Shpotyuk, O.

“…Porous structure evolution in functional humidity-sensitive MgAl2O4 spinel ceramics prepared at different sintering temperatures is studied. It is shown that…”
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Analytical Description of Degradation-Relaxation Transformations in Nanoinhomogeneous Spinel Ceramics by Shpotyuk, O., Brunner, M., Hadzaman, I., Balitska, V., Klym, H.

“…Mathematical models of degradation-relaxation kinetics are considered for jammed thick-film systems composed of screen-printed spinel Cu 0.1 Ni 0.1 Co 1.6 Mn…”
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High-resolution XPS for determining the chemical order in chalcogenide network glasses by Golovchak, R., Shpotyuk, O., Kovalskiy, A.

“…The power of X-ray photoelectron spectroscopy (XPS) measurements and analysis is demonstrated to establish the structure of network glasses using the examples…”
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Compositionally-dependent structural variations in glassy chalcogenides: The case of binary As-Se system by Shpotyuk, O, Hyla, M, Boyko, V

“…Structural peculiarities of glass formation in binary As-Se system occur to be compositionally dependent demonstrating anomalous oscillating tendencies toward…”
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Medium-range structural changes in glassy As2S3 driven by high-energy mechanical milling by Shpotyuk, O., Demchenko, P., Shpotyuk, Y., Bujňáková, Z., Baláž, P.

“…Effect of high-energy dry mechanical milling on medium-range order structure in glassy arsenic sulfide g-As2S3 was studied employing the X-ray powder…”
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Degradation transformation in spinel-type functional thick-film ceramic materials by Klym, H., Balitska, V., Shpotyuk, O., Hadzaman, I.

“…•Thermally-induced relaxation in spinel ceramics obeys stretched exponential behavior.•Stretched-exponential kinetics is proper to own degradation.•Suppressed…”
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Free volume evolution in chalcogenide glasses as probed by PAL spectroscopy by Shpotyuk, O., Filipecki, J., Shpotyuk, M., Ingram, A.

“…A newly modified correlation equation between defect-related positron lifetime τ2 (ns) determined within two-state trapping model and corresponding radius of…”
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On the compositional diversity of physical aging kinetics in chalcogenide glasses by Shpotyuk, O., Kozdras, A., Balitska, V., Golovchak, R.

“…Compositional features of enthalpy losses ΔH(t) caused by long-term physical aging at normal conditions are studied at the example of Se-rich chalcogenide…”
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Sintering-modified mixed Ni–Co–Cu oxymanganospinels for NTC electroceramics by Shpotyuk, O., Balitska, V., Hadzaman, I., Klym, H.

“…▶ Cu 0.1Ni 0.8Co 0.2Mn 1.9O 4 ceramics can be modified by high-temperature sintering. ▶ NiO phase serves as effective barrier to inhibit degradation in the…”
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Radiation-induced bond switching in chalcogenide semiconductor glasses from first-principles quantum-chemical calculations: On the role of dipole-type charged coordination defects by Shpotyuk, M., Hyla, M., Shpotyuk, O., Gurin, V.

“…[Display omitted] The probabilities of radiation-induced charged coordination defects in the form of dipole-type valence alteration pairs were estimated for…”
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Positron annihilation lifetime study of polyvinylpyrrolidone for nanoparticle-stabilizing pharmaceuticals by Shpotyuk, O, Bujňáková, Z, Baláž, P, Ingram, A, Shpotyuk, Y

“…Positron annihilation lifetime spectroscopy was applied to characterize free-volume structure of polyvinylpyrrolidone used as nonionic stabilizer in the…”
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Kinetics of light-assisted physical ageing in chalcogenide glasses by Golovchak, R., Kozdras, A., Shpotyuk, O.

“…A fundamental understanding of glass relaxation under ambient temperatures, as well as under the external influences is vital to the glass and polymer science…”
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Coordination disordering in near-stoichiometric arsenic sulfide glass by Shpotyuk, O., Kozyukhin, S., Shpotyuk, Ya, Demchenko, P., Mitsa, V., Veres, M.

“…Compositionally-dependent deviations in structural metastability of near-stoichiometric glassy arsenic sulfides As38S62, As40S60 and As42S58 associated with…”
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Intrinsic phase separation in low-temperature quenched arsenic trisulfide glass by Shpotyuk, O., Kovalskiy, A., Trimble, J., Vlček, M., Shpotyuk, Ya, Kozyukhin, S.

“…The nature of intrinsic phase separation initiated under different homogenization routes is studied in arsenic trisulfide As2S3 glass using Raman scattering…”
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Free-volume nanostructural transformation in crystallized GeS2-Ga2S3-CsCl glasses by Klym, H., Ingram, A., Shpotyuk, O.

“…The free‐volume nanostructural transformation in fully crystallized (80GeS2–20Ga2S3)100–x(CsCl)x, x = 0; 5; 10; 15 chalcogenide glasses was studied by positron…”
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Cluster modelling of amorphization pathways in nanostructured arsenic monosulphide by Shpotyuk, O., Hyla, M., Boyko, V., Shpotyuk, Y., Balitska, V.

“…Competitive amorphization scenarios in arsenic monosulphide AsS under nanostructurization from directly-synthesized β -As 4 S 4 polymorph are identified…”
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