Browsing Zinātniskie raksti (CFI) / Scientific articles by Title
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Proton migration barriers in BaFeO3−δ – insights from DFT calculations
(Royal Society of Chemistry, 2023)Proton migration in the triple conducting perovskite BaFeO3−δ is investigated using first-principles density functional theory calculations. Oxygen-deficient BaFeO3−δ exhibits pronounced lattice distortions that entail ... -
Pulsed Electric Field: Fundamentals and Effects on the Structural and Techno-Functional Properties of Dairy and Plant Proteins
(MDPI, 2022)Dairy and plant-based proteins are widely utilized in various food applications. Several techniques have been employed to improve the techno-functional properties of these proteins. Among them, pulsed electric field (PEF) ... -
Pulsed Electric Fields Alter Expression of NF-κB Promoter-Controlled Gene
(MDPI, 2022)The possibility to artificially adjust and fine‐tune gene expression is one of the key mile-stones in bioengineering, synthetic biology, and advanced medicine. Since the effects of proteins or other transgene products ... -
Radiation-induced stable radicals in calcium phosphates: Results of multifrequency epr, ednmr, eseem, and endor studies
(Multidisciplinary Digital Publishing Institute (MDPI), 2021)This article presents the results of a study of radiation-induced defects in various synthetic calcium phosphate (CP) powder materials (hydroxyapatite—HA and octacalcium phosphate—OCP) by electron paramagnetic resonance ... -
Radioluminescence, thermoluminescence and dosimetric properties of ZnO ceramics
(Elsevier Ltd, 2017)Two types of ZnO ceramics were fabricated and characterized by XRD, SEM methods. The radioluminescence spectra were measured within the 300–550 K range. The defect luminescence band peaking at ~2.35 eV is the dominant one ... -
Raman spectral identification of phase distribution in anodic titanium dioxide coating
(Estonian Academy of Sciences, 2017)Growing need for cleaner environment and energy production has brought about a hunt for perspective materials. One of such perspective materials is titanium dioxide (TiO2, titania) due to its chemical stability and ... -
Re-Evaluation of Chromium Doped Alumina for Dosimetric Applications
(De Gruyter, 2021)Many medical examinations involve ionizing radiation. Although the range of available dosimeters is rather wide, their linearity and chemical stability are limited. Recently, there has been a growing interest in new, ... -
Reactive pulsed direct current magnetron sputtering deposition of semiconducting yttrium oxide thin film in ultralow oxygen atmosphere: A spectroscopic and structural investigation of growth dynamics
(Elsevier, 2023)An experimental investigation was conducted to explore spectroscopic and structural characterization of semiconducting yttrium oxide thin film deposited at 623 K (±5K) utilizing reactive pulsed direct current magnetron ... -
Recent progress in high-pressure X-ray absorption spectroscopy studies at the ODE beamline
(Taylor and Francis Ltd., 2020)High pressure energy-dispersive X-ray absorption spectroscopy is a valuable structural technique, especially, when combined with a nano-polycrystalline diamond anvil cell. Here we present recent results obtained using the ... -
Recent progress in understanding the persistent luminescence in SrAl2O4:Eu,Dy
(Taylor and Francis Ltd., 2019)Ever since the discovery of SrAl2O4:Eu,Dy persistent afterglow material, that can intensively glow up to 20 h, the mechanism of long-lasting luminescence has been a popular area of research. The research is focused on ... -
Recombination luminescence of X-ray induced paramagnetic defects in BaY2F8
(Elsevier B.V.Journal of Luminescence, 2020)Recombination luminescence (RL) and RL-detected electron paramagnetic resonance (RL-EPR) in BaY2F8 single crystal has been investigated after irradiation with X-rays at low temperature. The recombination process, which ... -
The Relation between Photoconductivity Threshold and Open-Circuit Voltage in Organic Solar Cells
(De Gruyter, 2022)Most of the solar cell parameters (short-circuit current, fill factor, power conversion efficiency) can only be determined by creating and measuring the solar cell. However, there is an empirical relation that links energy ... -
Revealing the local structure of CuMo1−xWxO4 solid solutions by multi-edge X-ray absorption spectroscopy
(Elsevier, 2022)The effect of tungsten substitution with molybdenum on the structure of CuMoWO (, 0.30, 0.50, 0.75) solid solutions was studied by multi-edge X-ray absorption spectroscopy. The simultaneous analysis of EXAFS spectra measured ... -
Reversible Photodoping of TiO2 Nanoparticles for Photochromic Applications
(American Chemical Society, 2018)Observations on the strong photochromic effect of crystalline TiO2 quantum dots (mean size ≈ 4 nm) are presented. The synthesized quantum dots consist of irregularly shaped anatase TiO2 nanoparticles (NPs) and are dispersed ... -
Review of First Principles Simulations of STO/BTO, STO/PTO, and SZO/PZO (001) Heterostructures
(MDPI, 2023)In this study, we review our first-principles simulations for STO/BTO, STO/PTO, and SZO/PZO (001) heterostructures. Specifically, we report ab initio B3PW calculations for STO/BTO, STO/PTO, and SZO/PZO (001) interfaces, ... -
A review of investigation on 4-substituted 1,8-naphthalimide derivatives
(Elsevier Ltd., 2020)In recent years, much attention has been paid to the design and preparation of new 4-substituted 1,8-naphthalimide architectures as well as to the studies of the properties of materials. Wide possibilities of changing the ... -
Review of Systematic Tendencies in (001), (011) and (111) Surfaces Using B3PW as Well as B3LYP Computations of BaTiO3, CaTiO3, PbTiO3, SrTiO3, BaZrO3, CaZrO3, PbZrO3 and SrZrO3 Perovskites
(MDPI, 2023)We performed B3PW and B3LYP computations for BaTiO3 (BTO), CaTiO3 (CTO), PbTiO3 (PTO), SrTiO3 (STO), BaZrO3 (BZO), CaZrO3 (CZO), PbZrO3 (PZO) and SrZrO3 (SZO) perovskite neutral (001) along with polar (011) as well as (111) ... -
The role of Ga and Bi doping on the local structure of transparent zinc oxide thin films
(Elsevier, 2021-07-25)Transparent undoped ZnO and additionally doped with Ga and Bi thin films were produced by magnetron sputtering. The thin films were comprehensively characterized by X-ray absorption, X-ray diffraction (XRD), X-ray photoelectron ... -
The role of intermolecular forces in contact electrification on polymer surfaces and triboelectric nanogenerators
(Royal Society of Chemistry, 2019)The contact electrification of polymer interfaces provides an energy harvesting function to triboelectric (nano)generators (TEG). The electron transfer between contacted-separated surfaces has been considered as the main ...