Browsing Zinātniskie raksti (CFI) / Scientific articles by Title
Now showing items 475-494 of 514
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Time-Dependent Density Functional Theory Calculations of N- and S-Doped TiO2 Nanotube for Water-Splitting Applications
(Multidisciplinary Digital Publishing Institute (MDPI), 2021)On the basis of time-dependent density functional theory (TD-DFT) we performed first-principle calculations to predict optical properties and transition states of pristine, N-and S-doped, and N+S-codoped anatase TiO2 ... -
Time-resolved FDTD and experimental FTIR study of gold micropatch arrays for wavelength-selective mid-infrared optical coupling
(Multidisciplinary Digital Publishing Institute (MDPI), 2021)Infrared radiation reflection and transmission of a single layer of gold micropatch two-dimensional arrays, of patch length ∼1.0 µm and width ∼0.2 µm, have been carefully studied by a finite-difference time-domain (FDTD) ... -
Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals
(Nature Research, 2020)Cerium doped Gd3Ga3Al2O12 (GGAG) single crystals as well as GGAG:Ce single crystals co-doped by divalent (Mg2+, Ca2+) and tetravalent (Zr4+, Ti4+) ions have been studied by means of time-resolved luminescence as well as ... -
Topological analysis of chemical bonding in the layered FePSe3 upon pressure-induced phase transitions
(Wiley, 2020)Two pressure-induced phase transitions have been theoretically studied in the layered iron phosphorus triselenide (FePSe3 ). Topological analysis of chemical bonding in FePSe3 has been performed based on the results of ... -
Toward On-Line Slag Composition Analysis: Optical Emissions from Laboratory Electric Arc
(Springer, 2021)Electric arc furnaces and ladle furnaces have an important role in the future of steelmaking where CO 2 emissions have to be mitigated to an acceptable level. One way to address this goal is to optimize and improve the ... -
Towards metal chalcogenide nanowire-based colour-sensitive photodetectors
(Elsevier B.V., 2018)In recent years, nanowires have been shown to exhibit high photosensitivities, and, therefore are of interest in a variety of optoelectronic applications, for example, colour-sensitive photodetectors. In this study, we ... -
Traffic induced air pollution modeling: Scenario analysis for air quality management in street canyon
(Elsevier B.V., 2019)Mathematical models are intensively used in environmental science for various reasons - status quo assessment, statistical modeling, forecasting, and planning, scenario analysis. Traffic flow and related atmospheric pollution ... -
Treatment of disorder effects in X-ray absorption spectra beyond the conventional approach
(Elsevier Ltd., 2020)The contribution of static and thermal disorder is one of the largest challenges for the accurate determination of the atomic structure from the extended X-ray absorption fine structure (EXAFS). Although there are a number ... -
Triboelectric behaviour of selected MOFs in contact with metals
(Royal Society of Chemistry, 2022)MOFs have been effectively used to magnify the triboelectric charge of polymers. However, so far the individual triboelectric properties and charge transfer mechanisms of MOFs haven't been reported. Triboelectric property ... -
Tribological and Mechanical Properties of the Nanostructured Superlattice Coatings with Respect to Surface Texture
(MDPI, 2022)Ceramic Nanostructured Superlattice Coatings (NSC) have broad applicability to improve the parts’ and assemblies’ tribological and mechanical properties for the needs of the automotive and aerospace industries. Improving ... -
Tribological and Micromechanical Properties of the Nanostructured Carbonitride/Nitride Coatings of Transition Metals Alloyed by Hf and Nb
(MDPI, 2023)In this article, the fabrication, characterization, tribological performance, and micromechanical properties of nanostructured smart coatings (NSC) based on the multilayered alternating carbonitride/nitride bilayer ... -
Tungsten–SiO2–Based Planar Field Emission Microtriodes with Different Electrode Topologies
(MDPI, 2023)This study examines the electrical properties and layer quality of field emission microtriodes that have planar electrode geometry and are based on tungsten (W) and silicon dioxide (SiO2). Two types of microtriodes were ... -
Tuning the Photoresponse of Nano-Heterojunction: Pressure-Induced Inverse Photoconductance in Functionalized WO3 Nanocuboids
(John Wiley and Sons Inc., 2019)Inverse photoconductivity (IPC) is a unique photoresponse behavior that exists in few photoconductors in which electrical conductivity decreases with irradiation, and has great potential applications in the development of ... -
Tunneling luminescence in long lasting afterglow of SrAl2O4:Eu,Dy
(Elsevier B.V., 2017)A long lasting (afterglowing) luminescent material SrAl2O4: Eu2+, Dy3+ was prepared by high temperature solid-state reaction method. The processes responsible for long lasting luminescence were studied by means of luminescence ... -
Ultrafast Laser Writing in Different Types of Silica Glass
(Wiley, 2023)It is demonstrated that ultrafast laser writing in silica glass depends on the grade of silica glass associated with the method of its manufacture. Moreover, laser-written modifications, in particular birefringent ... -
Ultrafast luminescence of Ga- and In-doped ZnO ceramics
(Elsevier, 2021)In the presented work we compare luminescence characteristics of ZnO:Ga and ZnO:In ceramics prepared by hot uniaxial pressing method. Two types of initial powders were used. The first one was nanosized powder prepared by ... -
Ultraviolet Exposure Improves SERS Activity of Graphene-Coated Ag/ZrO2 Substrates
(MDPI, 2023)This study reveals a significant improvement in surface-enhanced Raman scattering (SERS) activity of Ag/ZrO2 substrates covered with a few-layer graphene preliminary exposed to ultraviolet (UV) light. The SERS-active ... -
Understanding of conversion process of magnetron deposited thin films of amorphous ReOx to crystalline ReO3 upon thermal annealing
(ACS Publications, 2020)Thin films of rhenium trioxide (ReO3) were produced by reactive DC magnetron sputtering from metallic rhenium target followed by annealing in the air in the range of temperatures from 200C to 350C. Nanocrystalline ... -
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 ... -
Unraveling the interlayer and intralayer coupling in two-dimensional layered MoS2 by X-ray absorption spectroscopy and ab initio molecular dynamics simulations
(Elsevier, 2023)Understanding interlayer and intralayer coupling in two-dimensional layered materials (2DLMs) has fundamental and echnological importance for their large-scale production, engineering heterostructures, and development of ...