Browsing Zinātniskie raksti (CFI) / Scientific articles by Title
Now showing items 189-208 of 514
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First-principles LCAO study of the low and room temperature phases of CdPS3
(AIP Publishing, 2020)The electronic and atomic structure of a bulk 2D layered van-der-Waals compound CdPS3 was studied in the low (R3) and room (C2/m) temperature phases using first-principles calculations within the periodic linear combination ... -
First-Principles Modeling of Oxygen Adsorption on Ag-Doped LaMnO3 (001) Surface
(Springer Nature Switzerland AG, 2020)The density functional theory (DFT) method has been used to calculate oxygen adsorption on the Ag-doped MnO2- and LaO-terminated (001) LaMnO3 surfaces. The catalytic effect of Ag doping is revealed by comparison of the ... -
First-Principles Modelling of N-Doped Co3O4
(Sciendo, 2018)N-doped Co3O4 is a promising electrocatalyst. By means of first-principles calculations, various concentrations and spatial arrangements of NO atoms were modelled. Mutual interaction of the dopant atoms was analysed with ... -
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 ... -
Flexible diphenylsulfone versus rigid dibenzothiophene-dioxide as acceptor moieties in donor-acceptor-donor TADF emitters for highly efficient OLEDs
(Elsevier B.V., 2020)Flexible versus rigid molecular structures of donor-acceptor-donor type compounds are investigated with respect to efficiency of thermally activated delayed fluorescence (TADF) by theoretical and experimental approaches. ... -
Flexible nanosheets for plasmonic photocatalysis: microwave-assisted organic synthesis of Ni–NiO@Ni2CO3(OH)2 core–shell@sheet hybrid nanostructures
(Royal Society of Chemistry, 2023)Visible light-active nickel-based plasmonic photocatalysts provide a cost-effective alternative to noble metals. However, their rarity, fragility, and limited understanding pose challenges. This work presents a microwave-assisted ... -
Formation of dislocations and hardening of LiF under high-dose irradiation with 5–21 MeV 12C ions
(Springer Verlag, 2017)The emergence of dislocations and hardening of LiF crystals irradiated to high doses with 12C ions have been investigated using chemical etching, AFM, nanoindentation, and thermal annealing. At fluences ensuring the ... -
Formation of dislocations in LiF irradiated with 3He and 4He ions
(Elsevier B.V., 2018)Influence of the irradiation with 13.5 MeV 3He and 5 MeV 4He ions on the micro-structure and mechanical properties of LiF single crystals was studied. The depth profiles of nanoindentation, dislocation mobility, selective ... -
From electrochromic phenomena to energy harvesting and storage—an overview of solid state ionics research at the Institute of Solid State Physics, University of Latvia
(Springer, 2023)Solid state ionics is one of the key research topics of the Institute of Solid State Physics, University of Latvia since its establishment. The research direction included topics ranging from electrochromic phenomena in ... -
Gallium Concentration Optimisation of Gallium Doped Zinc Oxide for Improvement of Optical Properties
(De Gruyter, 2021)The near-band luminescence of doped ZnO is promising for advanced scintillators; however, the dopant type and concentration effects require a detailed study. Undoped and Ga-doped ZnO nanopowders were prepared by a ... -
Glass-forming nonsymmetric DWK-dyes with 5,5,5-triphenylpentyl and piparazine moieties for light-amplification studies
(SPIE, 2018)A series of 2,6-bis-styryl-4H-pyran-4-ylidene fragment containing glass-forming organic compounds with bonded amorphous phase promoting bulky triphenyl moieties through piperazine structural fragment [2-(2-(4-(bis(2-(tri ... -
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 ... -
Grain Boundary Wetting Phenomena in High Entropy Alloys Containing Nitrides, Carbides, Borides, Silicides, and Hydrogen: A Review
(MDPI, 2021)In this review, we analyze the structure of multicomponent alloys without principal components (they are also called high entropy alloys—HEAs), containing not only metals but also hydrogen, nitrogen, carbon, boron, or ... -
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 ...