Search Results - "Oleh, Shpotyuk"

Thermodynamic heat-transfer phenomena in nanostructured glassy substances: a comparative study on g-As5Se95 and g-As55Se45 by Kozdras, Andrzej, Shpotyuk, Oleh, Mahlovanyi, Bohdan, Shpotyuk, Yaroslav, Kovalskiy, Andriy

“…Nanostructurization-driven responses in calorimetric heat-transfer phenomena are compared for glassy arsenoselenides at different levels of their molecular…”
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Molecular-Network Transformations in Tetra-Arsenic Triselenide Glassy Alloys Tuned within Nanomilling Platform by Shpotyuk, Oleh, Hyla, Malgorzata, Shpotyuk, Yaroslav, Lukáčová Bujňáková, Zdenka, Baláž, Peter, Demchenko, Pavlo, Kozdraś, Andrzej, Boyko, Vitaliy, Kovalskiy, Andriy

“…Polyamorphic transformations driven by high-energy mechanical ball milling (nanomilling) are recognized in a melt-quenched glassy alloy of tetra-arsenic…”
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Nanostructured Molecular-Network Arsenoselenides from the Border of a Glass-Forming Region: A Disproportionality Analysis Using Complementary Characterization Probes by Shpotyuk, Oleh, Hyla, Malgorzata, Ingram, Adam, Shpotyuk, Yaroslav, Boyko, Vitaliy, Demchenko, Pavlo, Wojnarowska-Nowak, Renata, Lukáčová Bujňáková, Zdenka, Baláž, Peter

“…Binary As Se alloys from the border of a glass-forming region (65 < < 70) subjected to nanomilling in dry and dry-wet modes are characterized by the XRPD,…”
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Mechanochemistry of Chitosan-Coated Zinc Sulfide (ZnS) Nanocrystals for Bio-imaging Applications by Bujňáková, Zdenka, Dutková, Erika, Kello, Martin, Mojžiš, Ján, Baláž, Matej, Baláž, Peter, Shpotyuk, Oleh

“…The ZnS nanocrystals were prepared in chitosan solution (0.1 wt.%) using a wet ultra-fine milling. The obtained suspension was stable and reached high value of…”
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Equimolar As4S4/Fe3O4 Nanocomposites Fabricated by Dry and Wet Mechanochemistry: Some Insights on the Magnetic–Fluorescent Functionalization of an Old Drug by Shpotyuk, Oleh, Lukáčová Bujňáková, Zdenka, Baláž, Peter, Kovalskiy, Andriy, Sznajder, Małgorzata, Cebulski, Jozef, Shpotyuk, Yaroslav, Demchenko, Pavlo, Syvorotka, Ihor

“…Multifunctional nanocomposites from an equimolar As4S4/Fe3O4 cut section have been successfully fabricated from coarse-grained bulky counterparts, employing…”
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High-Energy Mechanical Milling-Driven Reamorphization in Glassy Arsenic Monoselenide: On the Path of Tailoring Special Molecular-Network Glasses by Shpotyuk, Yaroslav, Demchenko, Pavlo, Shpotyuk, Oleh, Balitska, Valentina, Boussard-Pledel, Catherine, Bureau, Bruno, Lukáčová Bujňáková, Zdenka, Baláž, Peter

“…The impact of high-energy milling on glassy arsenic monoselenide g-AsSe is studied with X-ray diffraction applied to diffuse peak-halos proper to intermediate-…”
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The Art of Positronics in Contemporary Nanomaterials Science: A Case Study of Sub-Nanometer Scaled Glassy Arsenoselenides by Shpotyuk, Oleh, Ingram, Adam, Boussard-Pledel, Catherine, Bureau, Bruno, Lukáčová Bujňáková, Zdenka, Baláž, Peter, Mahlovanyi, Bohdan, Shpotyuk, Yaroslav

“…The possibilities surrounding positronics, a versatile noninvasive tool employing annihilating positrons to probe atomic-deficient sub-nanometric imperfections…”
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Polyvinylpyrrolidone-nanosized glassy arsenoselenides characterized by complementary Positronics and XRD analysis by Shpotyuk, Yaroslav, Ingram, Adam, Shpotyuk, Oleh, Demchenko, Pavlo, Lukáčová Bujňáková, Zdenka, Baláž, Peter

“…Nanostructurization effects, in glassy arsenoselenides g-As x Se 100-x (5 ≤  x  ≤ 65) subjected to wet nanomilling in polyvinylpyrrolidone (PVP) water…”
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Impact of grinding media on high-energy ball milling-driven amorphization in multiparticulate As4S4/ZnS/Fe3O4 nanocomposites by Shpotyuk, Oleh, Bujňáková, Zdenka Lukáčová, Baláž, Peter, Shpotyuk, Yaroslav, Demchenko, Pavlo, Balitska, Valentina

“…[Display omitted] •Milling-driven AsS amorphization in multi-particulate β-As4S4-based grinding media.•Coexistence of milling-induced nanocrystalline…”
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Nanomilling-driven volumetric changes in multiparticulate As4S4-bearing nanocomposites recognized with a help of annihilating positrons by Oleh, Shpotyuk, Adam, Ingram, Yaroslav, Shpotyuk, Zdenka, Lukáčová Bujňáková, Peter, Baláž

“…Employing positron annihilation lifetime (PAL) spectroscopy, nanomilling-driven volumetric changes driven are identified in multiparticulate nanocomposites of…”
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Comparative study of free-volume changes in light-cured (dimeth)acrylate-type dental resin composites affected to artificial aging in dry-air and water-immersed mode by Shpotyuk, Olha, Ingram, Adam, Slobodzyan, Dmytro, Shpotyuk, Oleh, Filipecki, Jacek, Shpotyuk, Yaroslav

“…This research is intended to compare degradation processes in light-cured (dimeth)acrylate-type polymer/filler dental composites affected to aging in dry-air…”
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Influence of Sintering Temperature on Pore Structure and Electrical properties of Technologically Modified MgO-Al2O3 Ceramics by Klym, Halyna, Hadzaman, Ivan, Shpotyuk, Oleh

“…Technologically modified spinel ceramics are prepared from Al2O3 and 4MgCO3×Mg(OH)2×5H2O powders at 1200, 1300 and 1400 oC. The influence of sintering…”
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A Study of Reversible γ-Induced Structural Transformations in Vitreous Ge23.5Sb11.8S64.7 by High-Resolution X-ray Photoelectron Spectroscopy by Kovalskiy, Andriy, Jain, Himanshu, Miller, Alfred C, Golovchak, Roman Ya, Shpotyuk, Oleh I

“…The structural origin of reversible γ-induced effects in vitreous Ge23.5Sb11.8S64.7 has been investigated by high-resolution X-ray photoelectron spectroscopy…”
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On the glass-transition temperature Tg in chalcogenide glass-forming systems: Critical assessment on compositional changes within covalent bond approach by Shpotyuk, Mykhaylo, Shpotyuk, Oleh

“…Compositional variations in the glass-transition temperature Tg for chalcogenide systems predicted using overall mean bond energies E as suggested by L. Tichý…”
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On the glass-transition temperature T in chalcogenide glass-forming systems: Critical assessment on compositional changes within covalent bond approach by Shpotyuk, Mykhaylo, Shpotyuk, Oleh

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Photopolymerization shrinkage in dimethacrylate-based dental restorative composites probed by means of positron annihilation lifetime spectroscopy by Shpotyuk, Olha, Ingram, Adam, Shpotyuk, Oleh

“…Peculiarities of microstructure changes in void subsystem under light-curing polymerization in loosely- and densely-packed polymer/filler nanocomposites are…”
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On the paradigm of physical aging in stoichiometric As2Se3 glass as illusory manifestation of anti-aging ability in optimally-constrained covalent networks by Shpotyuk, Oleh, Golovchak, Roman, Shpotyuk, Yaroslav, Kovalskiy, Andriy

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Volumetric effects in the degradation of dimethacrylate-based polymer/filler nanocomposites: A positron annihilation study by Shpotyuk, Oleh, Ingram, Adam, Shpotyuk, Yaroslav, Filipecki, Jacek, Shpotyuk, Olha

“…The applicability of positron annihilation lifetime (PAL) spectroscopy to identify volumetric changes in nanostructured polymer/filler substances is first…”
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Thermodynamic heat-transfer phenomena in nanostructured glassy substances: a comparative study on g-As.sub.5Se.sub.95 and g-As.sub.55Se.sub.45 by Kozdras, Andrzej, Shpotyuk, Oleh, Mahlovanyi, Bohdan, Shpotyuk, Yaroslav, Kovalskiy, Andriy

“…Nanostructurization-driven responses in calorimetric heat-transfer phenomena are compared for glassy arsenoselenides at different levels of their molecular…”
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On the Temperature Behavior of Optical Gap in Arsenic Sulfide Glasses by Forsythe, James, Shpotyuk, Mykhaylo, Shpotyuk, Oleh, Golovchak, Roman

“…Temperature behavior of optical transmission in the fundamental optical absorption edge region is studied for a broad range of As–S glass compositions covering…”
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