Cietvielu fizikas institūts / Institute of Solid State Physics: Recent submissions
Now showing items 321-340 of 652
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EDA: EXAFS data-analysis software package
(Wiley, 2021)The EXAFS data-analysis software package EDA consists of a suite of programs running under a Windows operating system environment that is designed to perform all steps of conventional EXAFS data analysis such as extraction ... -
The influence of Zn2+ ions on the local structure and thermochromic properties of Cu1-xZnxMoO4 solid solutions
(Elsevier, 2021)The influence of zinc ions on the thermochromic properties of polycrystalline CuZnMoO (=0.10, 0.50, 0.90) solid solutions was studied by X-ray absorption spectroscopy at the Cu, Zn and Mo K-edges. Detailed structural ... -
Unprecedented pressure-driven metallization and topological charge transport in an anion radical salt
(Elsevier, 2021)The hybrid inorganic/organic closed -stacking and soft lattice of a copper anion radial (Copper-7,7,8,8-tetracyanoquinodimethane) renders its electrical conductivity and structural modifications, which are susceptible to ... -
Perovskite CH3NH3PbI3–XClx Solar Cells. Experimental Study of Initial Degradation Kinetics and Fill Factor Spectral Dependence
(De Gruyter, 2021)The main drawback of the methylammonium lead halide perovskite solar cells is their degradation in ambient atmosphere. To investigate ambient-air-induced cell degradation, spec-tral dependencies of open-circuit ... -
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, ... -
Thermoluminescence Response of AlN+Y2O3 Ceramics to Sunlight and X-Ray Irradiation
(De Gruyter, 2021)AlN is a wide band gap material with promising properties for dosimetric applications, especially in UV dosimetry. In the present research, the thermoluminescence method is used in order to better understand ... -
Evidence of nickel ions dimerization in NiWO4 and NiWO4 – ZnWO4 solid solutions probed by EXAFS spectroscopy and reverse Monte Carlo simulation
(Elsevier, 2021)The existence of exchange-coupled Ni ions – the so-called magnetic dimers – in wolframite-type NiWO and ZnNiWO solid solutions with high nickel content was discovered by X-ray absorption spectroscopy combined with reverse ... -
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 ... -
New Electroactive Polymers with Electronically Isolated 4,7-Diarylfluorene Chromophores as Positive Charge Transporting Layer Materials for OLEDs
(MDPI, 2021)A group of polyethers containing electroactive pendent 4,7-diarylfluorene chromophores have been prepared by the multi-step synthetic route. Full characterization of their structures has been presented. The polymeric ... -
Lung on a Chip Development from Off-Stoichiometry Thiol–Ene Polymer
(MDPI, 2021)Current in vitro models have significant limitations for new respiratory disease research and rapid drug repurposing. Lung on a chip (LOAC) technology offers a potential solution to these problems. However, these devices ... -
Cladding-Pumped Erbium/Ytterbium Co-Doped Fiber Amplifier for C-Band Operation in Optical Networks
(MDPI, 2021)Space-division multiplexing (SDM) attracts attention to cladding-pumped optical amplifiers, but they suffer from a low pump power conversion efficiency. To address this issue, ytterbium (Yb3+) and erbium (Er3+) co-doping ... -
Comparative Study on Micromechanical Properties of ZnO:Ga and ZnO:In Luminiscent Ceramics
(De Gruyter, 2021)Indium (0.038 at.%) and gallium (0.042 at.%) doped ZnO ceramics were prepared by hot pressing. Ceramics were investigated to determine their structural and mechanical characteristics for the prospective use in scintillators. ... -
Electrochemical exfoliation-streamline method for synthesis of nitrogen doped graphene
(Lithuanian Academy of Sciences Publishers, 2021)Graphene was discovered in the early 21st century, but has already proven itself in many applications – energy, medicine, electronics, food and sports, and more. Functionalization of nanostructured carbon materials with ... -
Evaluation of Physicochemical Properties of Amphiphilic 1,4-Dihydropyridines and Preparation of Magnetoliposomes
(MDPI, 2021)This study was focused on the estimation of the targeted modification of 1,4-DHP core with (1) different alkyl chain lengths at 3,5-ester moieties of 1,4-DHP (C12, C14 and C16); (2) N-substituent at position 1 of 1,4-DHP ... -
Antibacterial Activity of Positively and Negatively Charged Hematite (α-Fe2O3) Nanoparticles to Escherichia coli, Staphylococcus aureus and Vibrio fischeri
(MDPI, 2021)In the current study, the antibacterial activity of positively and negatively charged spherical hematite (α-Fe2O3) nanoparticles (NPs) with primary size of 45 and 70 nm was evaluated against clinically relevant bacteria ... -
Analysis of the Role of the Latvian Natural Gas Network for the use of Future Energy Systems: Hydrogen from Res
(De Gruyter, 2021)As EU is steadily moving in the direction of emission reduction, each country must develop plans to decarbonise the transport and energy sectors. In Latvia, transport sector is one of the biggest ... -
Perovskite CH3NH3PbI3–XClx Solar Cells and their Degradation (Part 1: A Short Review)
(De Gruyter, 2021)Development of hybrid organic-inorganic perovskite solar cells (PSC) has been one of the hottest research topics since 2013. Within brief literature review, we would like to achieve two objectives. Firstly, we ... -
Oxidation State and Local Structure of Chromium Ions in LaOCl
(MDPI, 2021)LaOCl doped with 0–10 mol% Cr was synthesized by thermal decomposition of chlorides. X-ray diffraction (XRD) analysis revealed that incorporation of chromium results in a decrease of the lattice parameter a and a simultaneous ... -
Oxygen evolution reaction on a N-doped Co0.5-terminated Co3O4 (001) surface
(De Gruyter, Latvian Academy of Sciences, 2020)Recent experimental findings suggest that the catalytic activity of Co3O4 for oxygen evolution reaction (OER) could be improved by nitrogen doping. We present preliminary OER modelling on a N-doped Co3O4 surface, with ... -
Epitaxial growth of perovskite oxide films facilitated by oxygen vacancies
(Royal Society of Chemistry, 2021)Single-crystal epitaxial films of technologically important and scientifically intriguing multifunctional ABO3 perovskite-type metal oxides are essential for advanced applications and understanding of these materials. In ...