Browsing Zinātniskie raksti (CFI) / Scientific articles by Title
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Grain growth in Na0.5Bi0.5TiO3-based solid solutions
(Taylor and Francis Ltd., 2019)This paper discusses effects of different dopants, sintering technique and parameters on microstructure and properties of pure and Yb, Er-doped Na0.5Bi0.5TiO3 (NBT). All stoichiometric compositions follow the abnormal grain ... -
Graphene Hybrid Metasurfaces for Mid-Infrared Molecular Sensors
(MDPI, 2023)We integrated graphene with asymmetric metal metasurfaces and optimised the geometry dependent photoresponse towards optoelectronic molecular sensor devices. Through careful tuning and characterisation, combining ... -
Growth and characterization of PbI2-decorated ZnO nanowires for photodetection applications
(Elsevier B.V., 2020)In this study, we demonstrated for the first time the growth of ZnO nanowires (NWs) decorated with highly crystalline few-layer PbI2 and fabricated two-terminal single-nanowire photodetector devices to investigate the ... -
Guest Editorial
(Taylor and Francis Ltd., 2019) -
Hardening of Steel Perforated Tape by Nd:YAG Laser
(Trans Tech Publications Ltd., 2017)One of the directions of application of the perforated metal material is their use as cutting elements in the production of processing tools. In this case it is necessary to carry out hardening of cutting surfaces to ... -
Hardness and modulus of elasticity of atomic layer deposited Al2O3-ZrO2 nanolaminates and mixtures
(Elsevier B.V., 2020)Atomic layer deposition was used to produce 90–105 nm thick alumina-zirconia mixtures and nanolaminate structures on soda-lime glass substrate. The resultant chemical and structural compositions of the thin films were ... -
Heat capacity and thermal conductivity of multiferroics Bi1-xPrxFeO3
(Taylor and Francis Ltd., 2019)The heat capacity and thermal conductivity of multiferroics Bi1–xPrxFeO3 (0 ≤ x ≤ 0.50) has been studied in the temperature range of 130–800 K. A slight substitution of praseodymium for bismuth is found to lead to a ... -
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 ... -
High Performance Triboelectric Nanogenerators from Compostable Cellulose-Biodegradable Poly(Butylene Succinate) Composites
(Wiley, 2023)Triboelectric nanogenerator (TENG) devices are exemplar systems for mechanical-to-electrical energy conversion due to their simplicity and promising performance. However, little attention has been paid to recycling or ... -
High power impulse magnetron sputtering of Zn/Al target in an Ar and Ar/O2 atmosphere: The study of sputtering process and AZO films
(Elsevier B.V., 2019)Reactive high power impulse magnetron sputtering (R-HiPIMS) has been demonstrated as a promising technique for the ZnO:Al (AZO) thin film deposition at low temperature with improved electrical properties compared to the ... -
High resolution luminescence spectroscopy and thermoluminescence of different size LaPO4:Eu3+ nanoparticles
(Elsevier B.V., 2018)Nanoparticles (5 nm) and nanorods (2 nm × 15 nm and 4 nm × 20 nm) of monoclinic monazite LaPO4:Eu3+ were prepared by reverse micelle and co-precipitation techniques. Effects of the particle size and surface defects on the ... -
High-order harmonics generation in Cd and Pd laser-induced plasmas
(Optica Publishing Group, 2023)We demonstrate the generation of high-order harmonics of laser pulses in palladium and cadmium plasmas. We adjusted the wavelength of driving pulses to investigate the resonance enhancement in different ranges of extreme ... -
High-pressure synthesis of boron-rich chalcogenides B12S and B12Se
(Elsevier, 2022)Two boron-rich chalcogenides B12S and B12Se isostructural to α-rhombohedral boron were synthesized by chemical reaction of the elements at high-pressure – high-temperature conditions. The crystal structures and stoichiometries ... -
High-Quality Si-Doped β-Ga2O3 Films on Sapphire Fabricated by Pulsed Laser Deposition
(Wiley-VCH Verlag, 2020)Pulsed laser ablation is used to form high-quality silicon-doped β-Ga2O3 films on sapphire by alternatively depositing Ga2O3 and Si from two separate sources. X-ray analysis reveals a single crystallinity with a full width ... -
High-temperature X-ray absorption spectroscopy study of thermochromic copper molybdate
(Acta Materialia Inc, 2019)X-ray absorption spectroscopy at the Cu and Mo K-edges was used to study the effect of heating on the local atomic structure and dynamics in copper molybdate (α-CuMoO4) in the temperature range from 296 to 973 K. The reverse ... -
Hybrid density functional calculations of hyperfine coupling tensor for hole-type defects in MgAl2O4
(Elsevier B.V., 2020)We have performed the density functional calculations (DFT) on the hole-type defects (V-centres) in magnesium aluminate spinel (MgAl2O4) following the results of recent paramagnetic resonance measurements (EPR) in Nucl. ... -
Hybrid Tribo-Piezo-Electric Nanogenerator with Unprecedented Performance Based on Ferroelectric Composite Contacting Layers
(American Chemical Society, 2019)It was recently reported that more efficient triboelectric nanogenerator (TENG)-like devices can be prepared using inversely polarized ferroelectric films made of same material as the contacting layers. In the present work, ... -
Hydrogen from industrial aluminium scraps: Hydrolysis under various conditions, modelling of pH behaviour and analysis of reaction by-product
(Elsevier, 2023)The study explores the feasibility of utilizing aluminium scrap waste from the construction industry for hydrogen production via hydrolysis. Specifically, the study involves a primary analysis of aluminium scrap waste and ... -
Hydrothermal Synthesis and Properties of Yb3+/Tm3+ Doped Sr2LaF7 Upconversion Nanoparticles
(MDPI, 2023)We report the procedure for hydrothermal synthesis of ultrasmall Yb3+/Tm3+ co-doped Sr2LaF7 (SLF) upconversion phosphors. These phosphors were synthesized by varying the concentrations of Yb3+ (x = 10, 15, 20, and 25 mol%) ... -
Identification of Active Sites for Oxygen Reduction Reaction on Nitrogen- and Sulfur-Codoped Carbon Catalysts
(American Chemical Society, 2019)Nitrogen- and sulfur-codoped carbon catalysts were prepared as electrocatalytic materials for the oxygen reduction reaction (ORR). Herein, we propose a novel and effective one-pot synthetic approach to prepare a NS-doped ...