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Article
Cluster modeling of nanostructurization-driven reamorphization pathways in glassy arsenoselenides: a case study of arsenic monoselenide g-AsSe
Nanostructurization-driven reamorphization pathways in glassy arsenic monoselenide g-AsSe originated from both realgar- and pararealgar-type As4Se4 molecules are refined employing ab initio quantum-chemical model...
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Article
Cluster modelling of amorphization pathways in nanostructured arsenic monosulphide
Competitive amorphization scenarios in arsenic monosulphide AsS under nanostructurization from directly-synthesized β-As4S4 polymorph are identified employing ab-initio quantum-chemical modelling route with clust...
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Article
Preparation and characterization of stable fluorescent As4S4/ZnS/Fe3O4 nanosuspension capped by Poloxamer 407 and folic acid
Novel drug delivery systems containing advanced materials are currently the focus of many scientists, particularly in the field of medicine. Nowadays, these materials can play an important role when the author...
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Article
Open AccessMicrostructure and luminescent properties of Eu3+-activated MgGa2O4:Mn2+ ceramic phosphors
Mn2+ and the trivalent europium (Eu3+)-doped MgGa2O4 ceramics are characterized using a multi-experimental approach. The formation of spinel-structured ceramics is ascertained from X-ray diffraction (XRD) analysi...
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Chapter and Conference Paper
Structure, Morphology, and Optical-Luminescence Properties of Eu3+- and Mn2+-Activated ZnGa2O4 and MgGa2O4 Ceramics
The polycrystalline magnesium and zinc gallate compounds co-doped with Mn2+ and Eu3+ ions fabricated via high-temperature solid-state reaction ceramic technique are investigated in this work. The characterization...
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Article
Structure, morphology and optical-luminescence investigations of spinel ZnGa2O4 ceramics co-doped with Mn2+ and Eu3+ ions
The polycrystalline zinc gallate ZnGa2O4: Mn2+ and ZnGa2O4: Mn2+, Eu3+ samples have been synthesized via high-temperature solid-state reaction ceramic technique. The obtained ceramics have been characterized empl...
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Article
Free volume studies on mechanochemically milled β-As4S4 arsenical employing positron annihilation lifetime spectroscopy
Atomic-deficient free-volume transformations in directly synthesized β-As4S4 arsenical subjected to nanostructurization due to high-energy speed-increased (0–200–500–600 rpm) milling are comprehensively studied e...
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Chapter and Conference Paper
Structural Study of the Modified Cu0.4Co0.4Ni0.4Mn1.8O4 and Cu0.1Ni0.8Co0.2Mn1.9O4 Ceramics Using Combined Methods
Structural peculiarities of temperature-sensitive Cu0.4Co0.4Ni0.4Mn1.8O4 ceramics caused by micro- and macro-modifications as well as Cu0.1Ni0.8Co0.2Mn1.9O4 ceramics related with monolithization processes were st...
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Chapter and Conference Paper
Grain Porous Structure and Exploitation Properties of Humidity-Sensitive Magnesium Aluminate Spinel-Type Ceramics
Grain porous structure in functional humidity-sensitive MgAl2O4 and modified MgO-Al2O3 ceramics prepared at 1200, 1300, and 1400 °C at 2 h is studied using combined X-ray diffraction, scanning electron microscopy...
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Chapter and Conference Paper
Influence of Free Volumes on Functional Properties of Modified Chalcogenide Glasses and Oxide Ceramics
Influences of inner free-volume structure on the functional properties of chalcogenide GeSe2-Ga2Se3 and GeS2-Ga2S3-CsCl glasses as well as oxide Cu0.4Co0.4Ni0.4Mn1.8O4 and MgO-Al2O3 ceramics caused by their modif...
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Article
Open AccessAnalytical Description of Degradation-Relaxation Transformations in Nanoinhomogeneous Spinel Ceramics
Mathematical models of degradation-relaxation kinetics are considered for jammed thick-film systems composed of screen-printed spinel Cu0.1Ni0.1Co1.6Mn1.2O4 and conductive Ag or Ag-Pd alloys. Structurally intrins...
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Article
Nanostructural Free-Volume Effects in Humidity-Sensitive MgO-Al2O3 Ceramics for Sensor Applications
Technologically modified spinel MgO-Al2O3 ceramics were prepared from Al2O3 and 4MgCO3·Mg(OH)2·5H2O powders at sintering temperatures of 1200, 1300, and 1400 °C. Free-volume structural effects in MgO-Al2O3 cerami...
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Article
Open AccessFree-Volume Nanostructurization in Ga-Modified As2Se3 Glass
Different stages of intrinsic nanostructurization related to evolution of free-volume voids, including phase separation, crystalline nuclei precipitation, and growth, were studied in glassy As2Se3 doped with Ga u...
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Article
Positronics of radiation-induced effects in chalcogenide glassy semiconductors
Using As2S3 and AsS2 glasses as an example, the principal possibility of using positron annihilation spectroscopy methods for studying the evolution of the free volume of hollow nanoobjects in chalcogenide glassy...
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Chapter and Conference Paper
Structural Analysis of Ge-Ga-Se/S-CsCl Glasses and Glass-Ceramics for Application in Chalcogenide and Chalcohalide Photonics
The current state-of-the-art of the modern photonics indicates on significant importance of glassy-like multifunctional media with improved exploitation proper-ties. For example, chalcogenide and chalcohalide ...
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Article
Kinetics of light-assisted physical ageing in chalcogenide glasses
A fundamental understanding of glass relaxation under ambient temperatures, as well as under the external influences is vital to the glass and polymer science communities. Our results show that kinetics of lig...
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Article
Filament-induced self-written waveguides in glassy As4Ge30S66
The filamentation of femtosecond laser pulses and filament-induced self-writing of a permanent waveguide are observed in As4Ge30S66 chalcogenide glass. The radial profile of the self-written waveguide is extracte...
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Article
Valence band structure of binary chalcogenide vitreous semiconductors by high-resolution XPS
High-resolution X-ray photoelectron spectroscopy (XPS) is used to study regularities in the formation of valence band electronic structure in binary As x Se100 − x ...
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Article
Radiation effects in physical aging of binary As–S and As–Se glasses
Radiation-induced physical aging effects are studied in binary As x S100−x and As x Se100−x (3...
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Article
Spatiotemporal dynamics of femtosecond filament induced plasma channel in fused silica
Using microscopy techniques of femtosecond time-resolved optical polarigraphy and transient absorption, we have demonstrated resha** of a filamented laser pulse propagating within the bulk of fused silica ca...
