B6 – LU institūti un aģentūras / Institutes and agencies of the UL: Recent submissions
Now showing items 121-140 of 742
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Effect of High-Pressure Torsion on Phase Formation and Mechanical Properties of a High-Entropy TiZrHfMoCrCo Alloy
(MDPI, 2023)This investigation delved into the alterations in the mechanical properties of a TiZrHfMoCrCo high-entropy alloy due to phase transformations induced by high-pressure torsion (HPT). The alloy’s genesis involved levitation ... -
Characterization of Mechanical Oscillations in Bismuth Selenide Nanowires at Low Temperatures
(MDPIO, 2023)A single transistor preamplifier circuit was designed to facilitate electrical detection of mechanical oscillations in nanoelectromechanical systems (NEMSs) at low temperatures. The amplifier was integrated in the close ... -
Characterization of Structural Stability of Magnetron Sputtered Tungsten-boron Thin Films at Elevated Temperatures
(Kaunas University of Technology, 2023)In the divertor of the tokamak type fusion reactors tungsten and tungsten-covered plasma facing materials are currently among the selected materials. However, metallic, high-Z plasma facing materials require plasma mitigation. ... -
A stability study of transparent conducting WO3/Cu/WO3 coatings with antimicrobial properties
(Elsevier, 2023)WO3/Cu/WO3 coatings are transparent electrodes, but conductivity and transmittance have been observed to decrease with time. This paper reports the improved stability of WO3/Cu/WO3 coatings deposited by magnetron sputtering ... -
Application of Calcium Aluminate Doped with Mn and Cr in Optical Thermometry
(Sciendo, 2023)Optical thermometers are advantageous for temperature measurement in electromagnetic fields and aggressive environments; however, their composition mostly relies on materials doped with expensive and resource-limited rare ... -
Effect of Printing Direction and Post-Printing Conditions on Bending Properties of ULTEM 9085
(MDPI, 2023)The purpose of this study was to reveal the effect of printing direction and post-printing conditions on static and fatigue bending characteristics of Ultem 9085 at two stress levels. Right after the printing, the Ultem ... -
Effect of High-Pressure Torsion on Phase Formation and Mechanical Properties of a High-Entropy TiZrHfMoCrCo Alloy
(MDPI, 2023)This investigation delved into the alterations in the mechanical properties of a TiZrHfMoCrCo high-entropy alloy due to phase transformations induced by high-pressure torsion (HPT). The alloy’s genesis involved levitation ... -
Assessment of Oxidative Stress by Detection of H2O2 in Rye Samples Using a CuO- and Co3O4-Nanostructure-Based Electrochemical Sensor
(MDPI, 2023)Hydrogen peroxide is essential for biological processes and normally occurs in low concentrations in living organisms. However, exposure of plants to biotic and abiotic stressors can disrupt their defense mechanisms, ... -
Ab Initio Study on the Vibrational and Electronic Properties of Radiation-Induced Defects in Potassium Bromide
(MDPI, 2024)The vibrational and electronic properties of several basic radiation defects in potassium bromide are computed at the quantum mechanical level using a periodic supercell approach based on hybrid functionals, an all-electron ... -
Theoretical Study on (n,n)-Nanotubes Rolled-up from B/N Substituted Me-Graphene
(MDPI, 2023)In this work, the (𝑛,𝑛) -type nanotube systems rolled up from the B/N substituted Me-graphene (i.e., Me-CBNT and Me-CNN, respectively) were investigated with the aid of the density functional theory (DFT). Due to the ... -
The Effect of Fast Kr Ion Irradiation on the Optical Absorption, Luminescence, and Raman Spectra of BaFBr Crystals
(MDPI, 2023)In this work, using photoluminescence (PL), optical absorption (OA), Raman spectroscopy (RS), and atomic force microscopy (AFM), the radiation damage of BaFBr crystals irradiated with 147 MeV 84Kr ions to fluences (1010–1014) ... -
Study of β-Ga2O3 Ceramics Synthesized under Powerful Electron Beam
(MDPI, 2023)The synthesis of β-Ga2O3 ceramic was achieved using high-energy electron beams for the first time. The irradiation of gallium oxide powder in a copper crucible using a 1.4 MeV electron beam resulted in a monolithic ceramic ... -
Study of the structural and morphological characteristics of the CdxTeyOz nanocomposite obtained on the surface of the CdS/ZnO heterostructure by the SILAR method
(Springer, 2023)CdxTeyOz nanocomposite films were grown by the SILAR method on the CdS/ZnO surface during cyclic processing in precursor solutions followed by removal of excess reagent from the surface of the substrate by washing in ... -
Study of the relationship between changes in the structural, optical, and strength properties of AlN ceramics subjected to irradiation with heavy Xe23+ ions
(MDPI, 2023)The purpose of this study is to comprehensively analyze the influence of different fluences of irradiation with Xe23+ heavy ions on alterations in the structural, optical, and strength properties of AlN ceramics and to ... -
Selective uptake and desorption of carbon dioxide in carbon honeycombs of different sizes
(American Institute of Physics, 2024)Carbon honeycombs (CHs) are new carbon cellular structures, very promising in many respects, in particular, for high-capacity storage of various materials, especially in gaseous and liquid forms. In this study, we report ... -
Optical Characteristics of MgAl2O4 Single Crystals Irradiated by 220 MeV Xe Ions
(MDPI, 2023)In In this study, the optical properties of magnesium-aluminate spinel were examined after being irradiated with 220 MeV Xe ions. The research aimed to simulate the impact of nuclear fuel fission fragments on the material. ... -
Nanopore Formation at the Junctions of the Polycrystal Intergranular Boundary Under Plastic Deformation
(Sciendo, 2023)The article is devoted to the study of the mechanism of nanopore formation in the junctions of polycrystal grains under the plastic deformation of a polycrystal due to the conservative sliding of lattice dislocations. A ... -
Improvement of β-SiC Synthesis Technology on Silicon Substrate
(MDPI, 2023)This article presents an enhanced method for synthesizing β-SiC on a silicon substrate, utilizing porous silicon as a buffer layer, followed by thermal carbide formation. This approach ensured strong adhesion of the SiC ... -
Electronic, optical, and vibrational properties of an AgAlS2 crystal in a high-pressure phase
(MDPI, 2023)The aim of this study is to comprehensively examine the structural composition and properties of the AgAlS2 crystal during its high-pressure phase. This analysis delves into the second coordination environment of the crystal ... -
Electrochemical Growth and Structural Study of the AlxGa1−xAs Nanowhisker Layer on the GaAs Surface
(MDPI, 2023)This work presents a novel, cost-effective method for synthesizing AlxGa1−xAs nanowhiskers on a GaAs surface by electrochemical deposition. The process begins with structuring the GaAs surface by electrochemical etching, ...