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15 resultados encontrados.

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Colloidal Cu2ZnSnS4-based and Ag-doped Nanocrystals: Synthesis and Raman Spectroscopy Study
Artículo
Acceso abierto Artículo DOAJ
V. Dzhagan et al · Vasyl Stefanyk Carpathian National University · 2021 · ISSN 1729-4428
Cu2ZnSnS4 (CZTS) is one of the promising materials for absorber layers of new-generation thin film solar cells. Various synthetic routes of materials preparation and structural characterization have been explored so far....
LCC TENDOlBoeXNpY3M~Idioma eng
Acceso abiertoRuta libre sin proxy. Acceso recomendado cuando no hay suscripción activa.
Open Access
X-ray Photoelectron Spectroscopy Study of Electronic Structure of Graphene Nanosheets
Artículo
Material complementario disponible Artículo DOAJ
B. I. Ilkiv et al · Vasyl Stefanyk Carpathian National University · 2016 · ISSN 1729-4428
Investigations of graphene nanosheets and oxidized graphene nanosheets were carried out using X-rayphotoelectron spectroscopy. Scanning and transmission electron microscopy investigations were used in additionto X-ray ph...
LCC TENDOlBoeXNpY3M~Idioma eng
Material complementario disponibleEl enlace apunta a material asociado, anexos, tablas, datos o página complementaria. No se marca como libro/texto completo.
Material complementario
Effect of thermochemical activation temperature on electrical conductivity and concentration of charge carriers in the obtained porous carbon materials
Artículo
Acceso abierto Artículo DOAJ
B.I. Rachiy et al · Vasyl Stefanyk Carpathian National University · 2024 · ISSN 1729-4428
By changing the temperature of chemical activation of plant biomass, nanoporous carbon materials with a specific surface area of up to 1050 m2/g were obtained. The obtained carbon materials were used to form composites w...
LCC TENDOlBoeXNpY3M~Idioma eng
Acceso abiertoRuta libre sin proxy. Acceso recomendado cuando no hay suscripción activa.
Open Access
FT-IR Spectroscopic Study of the Radiation-Chemical Decomposition of n-Hexane on Nano-ZrO2
Artículo
Acceso abierto Artículo DOAJ
T.N. Agayev et al · Vasyl Stefanyk Carpathian National University · 2023 · ISSN 1729-4428
The radiation-chemical decomposition of n-hexane in the nano-ZrO2 +n-hexane system under the action of gamma radiation at room temperature is studied by the method of Fourier-IR spectroscopy. The molecular and dissociati...
LCC TENDOlBoeXNpY3M~Idioma eng
Acceso abiertoRuta libre sin proxy. Acceso recomendado cuando no hay suscripción activa.
Open Access
Hopping conductivity in lithium-iron spinel doped with La,Y
Artículo
Acceso abierto Artículo DOAJ
A.V. Vakalyuk et al · Vasyl Stefanyk Carpathian National University · 2025 · ISSN 1729-4428
The temperature-frequency dependences of the electrical characteristics of Li2Fe2,5-xMexO4 (Ме=La;Y, x=0;0.01;0.03;0.05) spinels synthesized by the «sol-gel» autocombustion technology  were obtained by the method of...
LCC TENDOlBoeXNpY3M~Idioma eng
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Open Access
Nanomechanical and optical vibrations properties of vanadium oxide thin films obtained by multi-step deposition approach
Artículo
Material complementario disponible Artículo DOAJ
Andrii Korchoviy et al · Vasyl Stefanyk Carpathian National University · 2024 · ISSN 1729-4428
Vanadium oxide thin films were fabricated using a multi-step deposition process involving magnetron sputtering and sequential annealing. The structural, vibrational, and nanomechanical properties of the films were invest...
LCC TENDOlBoeXNpY3M~Idioma eng
Material complementario disponibleEl enlace apunta a material asociado, anexos, tablas, datos o página complementaria. No se marca como libro/texto completo.
Material complementario
Phase transitions in compressed metil silica with the participation of water and methanol
Artículo
Acceso abierto Artículo DOAJ
V.V. Turov et al · Vasyl Stefanyk Carpathian National University · 2025 · ISSN 1729-4428
Methanol, water, and their mixtures in the interparticle gaps of wetting-drying methyl silica AM-1 were studied using low-temperature 1H NMR spectroscopy. The bulk density of the samples in the wet state was 200-300 mg/c...
LCC TENDOlBoeXNpY3M~Idioma eng
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Open Access
Removal of Cr (III) and Cr (VI) ions by adsorbent based on Titanium Dioxide
Artículo
Acceso abierto Artículo DOAJ
I. Mironyuk et al · Vasyl Stefanyk Carpathian National University · 2024 · ISSN 1729-4428
In this paper, the adsorption of trivalent chromium cations by a sample of sodium-modified TiO2 was studied. XRF analysis of the TiO2 surface was performed.  The dependence of the adsorption value on the duration of the...
LCC TENDOlBoeXNpY3M~Idioma eng
Acceso abiertoRuta libre sin proxy. Acceso recomendado cuando no hay suscripción activa.
Open Access
Synthesis and ionic conductivity of glass ceramics with general composition (2-х)Na2О : хМІ2О : 3CoО : 2P2O5 (х = 0 or 0.05, МІ – Li, K)
Artículo
Acceso abierto Artículo DOAJ
N.Yu. Strutynska et al · Vasyl Stefanyk Carpathian National University · 2024 · ISSN 1729-4428
Glass ceramic samples with general composition: (2-х)Na2О : хМІ2О : 3CoО : 2P2O5 (х = 0 or  0.05, МІ – Li, K) were synthesized by melt method with subsequent annealing of homogeneous glass at a temperature o...
LCC TENDOlBoeXNpY3M~Idioma eng
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Open Access
The mechanisms of nickel-iron spinel phase nucleation in aquous solutions: crystal quasichemical approach
Artículo
Acceso abierto Artículo DOAJ
V. Bojchuk et al · Vasyl Stefanyk Carpathian National University · 2019 · ISSN 1729-4428
The phenomenological model of nikel-iron spinel nucleation with spinel structure based on the partial charge theory and analysis of hydrolysis and polycondensation processes at the interaction of Fe3+-, Fe2+- and Ni2+- h...
LCC TENDOlBoeXNpY3M~Idioma eng
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Open Access
Water Clusterization in the Interparticle Space of Hydrophobic Nanosilica АМ-1
Artículo
Material complementario disponible Artículo DOAJ
T.V. Krupskaya et al · Vasyl Stefanyk Carpathian National University · 2021 · ISSN 1729-4428
The processes occurring in hydrated powders and concentrated suspensions of hydrophobic silica were studied by 1H NMR spectroscopy. It is shown that a mixture of methyl silica and water with a hydration of less than 1 g ...
LCC TENDOlBoeXNpY3M~Idioma eng
Material complementario disponibleEl enlace apunta a material asociado, anexos, tablas, datos o página complementaria. No se marca como libro/texto completo.
Material complementario
Analysis of the Structural, Morphological, and Elastic Properties of Nanosized CuFe2O4 Spinel Synthesized via Sol-Gel Self-Combustion Method
Artículo
Acceso abierto Artículo DOAJ
Julia Mazurenko et al · Vasyl Stefanyk Carpathian National University · 2024 · ISSN 1729-4428
Nanosized CuFe2O4 ferrite was synthesized through the sol-gel self-combustion technique, using iron and copper nitrates with citric acid as fuel. The synthesized ferrite was subsequently analyzed using X-ray diffraction ...
LCC TENDOlBoeXNpY3M~Idioma eng
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Open Access
Magnetite nanoparticles synthesized using grape fruit extract: synthesis, morphology, hyperthermia application and catalytic activity in hydrogen peroxide decomposition
Artículo
Acceso abierto Artículo DOAJ
Nazarii Danyliuk et al · Vasyl Stefanyk Carpathian National University · 2022 · ISSN 1729-4428
The paper presents a simple one-step "green" approach to the synthesis of magnetite nanoparticles. The magnetite nanoparticles were synthesized using fruit extract obtained from grape peels and grape pulp. The formation ...
LCC TENDOlBoeXNpY3M~Idioma eng
Acceso abiertoRuta libre sin proxy. Acceso recomendado cuando no hay suscripción activa.
Open Access
Preparation and Characterization of Nanosized Substituted Perovskite Compounds with Orthorhombic Structure
Artículo
Acceso abierto Artículo DOAJ
M.B. Khanvilkar et al · Vasyl Stefanyk Carpathian National University · 2021 · ISSN 1729-4428
In this work, five substituted perovskite such as (Gd0.9Sr0.1) Mn0.8Co0.2O3, Tb0.8Sr0.2FeO3, Gd0.6Sr0.4RuO3, SrCe0.95Y0.05O3, and Mn0.6Co0.4SnO3 were synthesized by tartrate and hydroxide precursor method. The resulting ...
LCC TENDOlBoeXNpY3M~Idioma eng
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Open Access
Study of the influence concentration difference of copper in properties of cerium nanopowder
Artículo
Acceso abierto Artículo DOAJ
Areej Adnan Hateef et al · Vasyl Stefanyk Carpathian National University · 2024 · ISSN 1729-4428
Various concentrations (3%, 6%, 9%) of copper added to pure cerium oxide nanopowder were prepared by the sol-gel method. The prepared samples were examined using different techniques to understand their surface compositi...
LCC TENDOlBoeXNpY3M~Idioma eng
Acceso abiertoRuta libre sin proxy. Acceso recomendado cuando no hay suscripción activa.
Open Access