Search Results - "GOLOVCHAK, R"

Dynamics of structural relaxation in bioactive 45S5 glass by Golovchak, R, Brennan, C, Fletcher, J, Ignatova, T, Jain, H

“…Kinetics of physical aging in archetypic 45S5 bioactive silicate glass composition with different types of phase separation are studied in situ below the glass…”
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Chemical order in Ga or Sb modified germanium sulfide glasses around stoichiometry: High-resolution XPS and Raman studies by Golovchak, R., Nazabal, V., Bureau, B., Oelgoetz, J., Kovalskiy, A., Jain, H.

“…To understand the unique features of germanium sulfide (~60–70 at.% of S) glasses modified with Ga or Sb, the chemical order in these materials is investigated…”
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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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Influence of phase separation on the devitrification of 45S5 bioglass by Golovchak, R., Thapar, P., Ingram, A., Savytskii, D., Jain, H.

“…The devitrification of the 45S5 variety of bioactive glasses (BGs) in relation to phase separation is studied with scanning electron microscopy, X-ray powder…”
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Oxygen incorporation into GST phase-change memory matrix by Golovchak, R., Choi, Y.G., Kozyukhin, S., Chigirinsky, Yu, Kovalskiy, A., Xiong-Skiba, P., Trimble, J., Pafchek, R., Jain, H.

“…•Surfaces of GST-225 films are depleted in Te as a result of the reaction with oxygen.•Top layers of oxidized GST-225 are formed by Sb and Ge oxide…”
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Amorphous rigidification and cooperativity drop in semi−crystalline plasticized polylactide by Varol, N., Delpouve, N., Araujo, S., Domenek, S., Guinault, A., Golovchak, R., Ingram, A., Delbreilh, L., Dargent, E.

“…Plasticization of amorphous polylactide shifts the glass transition and extends its temperature range of crystallization to lower temperatures. In this work,…”
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Computer program PARAV for calculating optical constants of thin films and bulk materials: Case study of amorphous semiconductors by Ganjow, A, Golovchak, R

“…A computer program 'PARAV' for calculating various optical constants, e.g., the dispersion of refractive index, optical absorption coefficient, optical…”
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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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Optical and thermal properties of Sb/Bi-modified mixed Ge-Ga-Se-Te glasses by Golovchak, R., Kozdras, A., Hodge, T., Szlęzak, J., Boussard-Pledel, C., Shpotyuk, Ya, Bureau, B.

“…The non-isothermal crystallization kinetics of novel BixGa5Ge20Sb10-xSe45Te20 (x = 1,3,5,10) glasses are studied with differential scanning calorimetry method,…”
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Effect of P/Bi substitution on optical and thermal properties of Ga-Ge-Se-Te glasses by Golovchak, R., Seage, M.J., Szlęzak, J., Shpotyuk, Y., Płoch, D., Cheviré, F., Boussard-Pledel, C., Bureau, B.

“…Novel P-containing bulk BixGa5Ge20P10-xSe45Te20 glasses have been successfully fabricated and studied with optical spectroscopy and differential scanning…”
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Incorporation of Ga into the structure of Ge–Se glasses by Golovchak, R., Calvez, L., Petracovschi, E., Bureau, B., Savytskii, D., Jain, H.

“…The structure of Ga-containing Ge–Se glasses is studied by high-resolution X-ray photoelectron and extended X-ray absorption fine-structure spectroscopies. 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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Remedial insight on ageing of glass through the study of ancient man‐made artefacts by Golovchak, R., Kovalskiy, A., Shpotyuk, Y., Mahlovanyi, B., Ploch, D., Ignatova, T., Kozdras, A., Cebulski, J., Czopek, S.

“…Ancient man‐made glass artefacts provide vital information about the physical and chemical processes occurring over the long‐term period of weathering…”
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Topology and chemical order in AsxGexSe1-2x glasses: A high-resolution X-ray photoelectron spectroscopy study by GOLOVCHAK, R, SHPOTYUK, O, IOVU, M, KOVALSKIY, A, JAIN, H

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Structure of SbxGe40-xSe60 glasses around 2.67 average coordination number by Sati, Dinesh C., Kovalskiy, A., Golovchak, R., Jain, H.

“…The evolution of the structure of SbxGe40-xSe60 (x=8, 12, 15, 18 and 20) chalcogenide glasses is determined by high resolution X-ray photoelectron spectroscopy…”
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Compositional dependences of average positron lifetime in binary As–S/Se glasses by Ingram, A., Golovchak, R., Kostrzewa, M., Wacke, S., Shpotyuk, M., Shpotyuk, O.

“…Compositional dependence of average positron lifetime is studied systematically in typical representatives of binary As–S and As–Se glasses. This dependence is…”
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Effect of Ga incorporation in the As30Se50Te20 glass by Shpotyuk, Ya, Bureau, B., Boussard-Pledel, C., Nazabal, V., Golovchak, R., Demchenko, P., Polovynko, I.

“…The effect of Ga addition on the physical properties and structure of As30−xGaxSe50Te20 alloys is studied using atomic density measurements, differential…”
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Structural organization of As-rich selenide glasses by Golovchak, R., Kovalskiy, A., Shpotyuk, O., Jain, H.

“…The structure of bulk AsxSe100−x (40≤x≤55) glasses, prepared by conventional melt-quenching method, is investigated using high-resolution XPS. The moieties of…”
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Fine kinetics of natural physical ageing in glassy As10Se90 by Balitska, V., Golovchak, R., Kozdras, A., Shpotyuk, O.

“…Sigmoid behavior of natural physical ageing in glassy As10Se90 reveals multi-step-wise growing kinetics of enthalpy losses. Phenomenological description of…”
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Compositional trends of γ-induced optical changes observed in chalcogenide glasses of binary As - S system by SHPOTYUK, M, SHPOTYUK, O, GOLOVCHAK, R, MCCLOY, J, RILEY, B

“…Compositional trends of gamma -induced optical changes in chalcogenide glasses are studied with the binary As-S system. Effects of gamma -irradiation and…”
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