Zinātniskie raksti (CFI) / Scientific articles: Recent submissions
Now showing items 221-240 of 604
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Electronic and Optical Properties of Rocksalt Mg1−xZnxO and Wurtzite Zn1−xMgxO with Varied Concentrations of Magnesium and Zinc
(MDPI, 2022)The structural, electronic and optical properties of rocksalt Mg (Formula presented.) Zn (Formula presented.) O and wurtzite Zn (Formula presented.) Mg (Formula presented.) O with the concentration of Zn and Mg varying ... -
Antiviral efficacy of cerium oxide nanoparticles
(Nature Research, 2022)Nanomaterials are prospective candidates for the elimination of viruses due to their multimodal mechanisms of action. Here, we tested the antiviral potential of a largely unexplored nanoparticle of cerium dioxide (CeO2). ... -
FIBRE OPTICAL COUPLER SIMULATION BY COMSOL MULTIPHYSICS SOFTWARE
(Sciendo, 2022)The paper presents a simulation model developed for a special optical coupler intended for coupling radiation from signal and pump sources used for the realization of cladding-pumped doped fibre amplifiers. The model is ... -
Flame-Retardant and Tensile Properties of Polyamide 12 Processed by Selective Laser Sintering
(MDPI, 2022)Composite materials are becoming widely applied in fire-critical conditions such as, e.g., aviation interior parts. Environmental considerations motivate the use of additive manufacturing due to the decrease of polymer ... -
ENERGY TRANSPORT IN SiO2 CRYSTALS: LUMINESCENCE EXCITATION SPECTRA OF STISHOVITE AND α-QUARTZ
(Sciendo, 2022)The migration of elementary electronic excitations was studied in a single crystal of stishovite and compared with migration in a crystal of α-quartz and polycrystalline stishovite powder. The research method is based on ... -
Electromechanical properties in CaTiO3modified Na0.5Bi0.5TiO3-BaTiO3solid solutions above morphotropic phase boundary
(American Institute of Physics Inc., 2022)The structural, electromechanical, and dielectric properties of (1-x)(0.8Na0.5Bi0.5TiO3-0.2BaTiO3)-xCaTiO3 [(1-x) (0.8NBT-0.2BT)-xCT] ceramics are studied as candidates for room temperature actuators with high field-induced ... -
Effect of Core–Shell Rubber Nanoparticles on the Mechanical Properties of Epoxy and Epoxy-Based CFRP
(MDPI, 2022)The aim of the research was to estimate the effect of core–shell rubber (CSR) nanoparticles on the tensile properties, fracture toughness, and glass transition temperature of the epoxy and epoxy-based carbon fiber reinforced ... -
EFFECT OF ELECTRON IRRADIATION CONDITIONS ON THE EFFICIENCY OF DEFECT FORMATION IN MgAl2 O4 SPINEL
(Natsional'nyi Nauchnyi Tsentr, 2022)The efficiency of defect formation in spinel ceramics of magnesium aluminate (MgAl2O4) under electron irradiation has been determined. A strong effect of cooling on the concentration of residual defects was revealed. When ... -
Glyphosate Sensor Based on Nanostructured Water-Gated CuO Field-Effect Transistor
(MDPI, 2022)This research presents a comparative analysis of water-gated thin film transistors based on a copper oxide (CuO) semiconductor in the form of a smooth film and a nanostructured surface. A smooth CuO film was deposited ... -
DEVELOPMENT OF LIQUID CRYSTAL LAYER THICKNESS AND REFRACTIVE INDEX MEASUREMENT METHODS FOR SCATTERING TYPE LIQUID CRYSTAL DISPLAYS
(Sciendo, 2022)We report the measuring method of scattering type display liquid crystal layer thickness based on capacitance values suitable for inline production process control. The method is selected for its effectiveness and simplicity ... -
DIELECTRIC AND PIEZOELECTRIC PROPERTIES OF 0.8Na0.5 Bi0.5 TiO3-0.2BaTiO3 MODIFIED WITH SODIUM NIOBATE
(Lithuanian Physical Society, 2022)In this paper, we present the dielectric and piezoelectric properties of tetragonal 0.8Na0.5 Bi0.5 TiO3-0.2BaTiO3 modified with NaNbO3 ((1-x)[0.8Na0.5 Bi0.5 TiO3-0.2BaTiO3 ]-xNaNbO3 ). Our experimental study has revealed ... -
Bi2Se3 Nanostructured Thin Films as Perspective Anodes for Aqueous Rechargeable Lithium-Ion Batteries
(MDPI, 2022)In recent years, aqueous rechargeable lithium-ion batteries (ARLIBs) have attracted attention as an alternative technology for electrical storage. One of the perspective battery anode materials for application in ARLIBs ... -
Peculiarities of the local structure in new medium- and high-entropy, low-symmetry tungstates
(Elsevier, 2022)New monoclinic (/) tungstates – a medium-entropy tungstate, (MnNiCuZn)WO4, and a high-entropy tungstate, (MnCoNiCuZn)WO4 – were synthesized and characterized. Their phase purity and solid solution nature were confirmed by ... -
Octahedral Tilting in Homologous Perovskite Series CaMoO3-SrMoO3-BaMoO3 Probed by Temperature-Dependent EXAFS Spectroscopy
(MDPI, 2022)Local distortions in perovskites can be induced by cation displacements and/or by the tilting and rotating of cation–anion octahedra. Both phenomena have been subject to intense investigations over many years. However, ... -
High Entropy Alloys for Energy Conversion and Storage: A Review of Grain Boundary Wetting Phenomena
(MDPI, 2022)The multicomponent alloys with nearly equal concentration of components, also known as high entropy alloys (HEAs), were first proposed 22 years ago. The HEAs quickly became very important in materials science due to their ... -
Theoretical study on hydrogen storage capacity of expanded h-BN systems
(Elsevier, 2017)In this work, the hydrogen storage capacity of the expanded hexagonal Boron Nitride (eh-BN) systems has been presented. We have employed a new equation of state (EOS) for hydrogen gas to figure out the hydrogen density ... -
First principles modeling of 3d-metal doped three-layer fluorite-structured TiO2 (4,4) nanotube to be used for photocatalytic hydrogen production
(Elsevier, 2017)We have estimated theoretically the photocatalytic suitability of thinnest single-wall fluorite-structured titania (4,4) nanotube (NT) possessing three layers each (O-Ti-O) and doped by Sc, V, Cr, Mn, Fe, Co, Ni, Cu and ... -
The effect of noise, a constant background, and bit depth on the phase retrieval of pure phase objects
(Oficyna Wydawnicza Politechniki Warszawskiej, 2021)In the current study, we investigate the effect of uniform white noise, Poisson noise and a constant background on the phase retrieval of pure phase objects. We also study the influence of the aforementioned factors on ... -
Peculiarities of Phase Formation in Mn-Based Na SuperIonic Conductor (NaSICon) Systems: The Case of Na1+2 xMnxTi2- x(PO4)3(0.0 ≤ x ≤ 1.5)
(American Chemical Society, 2021)NAtrium SuperIonic CONductor (NASICON) structured phosphate framework compounds are attracting a great deal of interest as suitable electrode materials for "rocking chair"type batteries. Manganese-based electrode materials ... -
Nanostructured Coating for Aluminum Alloys Used in Aerospace Applications
(The Electrochemical Society, 2022)A thin industrial corrosion-protection nanostructured coating for the Al alloy AA2024-T3 is demonstrated. The coating is prepared in a two-step process utilizing hard anodizing as a pre-treatment, followed by sealing and ...