B6 – LU institūti un aģentūras / Institutes and agencies of the UL: Recent submissions
Now showing items 101-120 of 1027
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Sb2S3 Thin-Film Solar Cells Fabricated from an Antimony Ethyl Xanthate Based Precursor in Air
(American Chemical Society, 2023)The rapidly expanding demand for photovoltaics (PVs) requires stable, quick, and easy to manufacture solar cells based on socioeconomically and ecologically viable earth-abundant resources. Sb2S3 has been a potential ... -
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%) ... -
ITO Thin Films for Low-Resistance Gas Sensors
(MDPI, 2023)Indium tin oxide thin films were deposited by magnetron sputtering on ceramic aluminum nitride substrates and were annealed at temperatures of 500 °C and 600 °C. The structural, optical, electrically conductive and ... -
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 ... -
Effects of Pulsed Electric Field on the Physicochemical and Structural Properties of Micellar Casein
(MDPI, 2023)Pulsed electric field (PEF) as a green processing technology is drawing greater attention due to its eco-friendliness and potential to promote sustainable development goals. In this study, the effects of different electric ... -
Filterless Visible-Range Color Sensing and Wavelength-Selective Photodetection Based on Barium/Nickel Codoped Bandgap-Engineered Potassium Sodium Niobate Ferroelectric Ceramics
(Wiley-Blackwell, 2023)Photosensors, photodetectors, or color sensors are key components for various optical and optoelectronic applications. Semiconductor-based photodetection has been a dominator which is excellent at measuring the photon ... -
Efficient ultrafast laser writing with elliptical polarization
(Springer Nature, 2023)Photosensitivity in nature is commonly associated with stronger light absorption. It is also believed that artificial optical anisotropy to be the strongest when created by light with linear polarization. Contrary to ... -
Critical Evaluation of the Methods for the Characterization of the Degree of Sulfonation for Electron Beam Irradiated and Non-Irradiated Sulfonated Poly(ether ether ketone) Membranes
(MDPI, 2023)Sulfonated poly(ether ether ketone) (SPEEK) materials are promising candidates for replacing Nafion™ in applications such as proton exchange membrane (PEM) and direct methanol fuel cells. SPEEK membranes have several ... -
Amorphous Calcium Phosphate and Amorphous Calcium Phosphate Carboxylate: Synthesis and Characterization
(American Chemical Society, 2023)Amorphous calcium phosphate (ACP) is the first solid phase precipitated from a supersaturated calcium phosphate solution. Naturally, ACP is formed during the initial stages of biomineralization and stabilized by an organic ... -
Ab Initio Modeling of CuGa1−xInxS2, CuGaS2(1−x)Se2x and Ag1−xCuxGaS2 Chalcopyrite Solid Solutions for Photovoltaic Applications
(MDPI, 2023)Chalcopyrites are ternary semiconductor compounds with successful applications in photovoltaics. Certain chalcopyrites are well researched, yet others remain understudied despite showing promise. In this study, we use ab ... -
Starptautiskā konference "Jauno vēsturnieku zinātniskie lasījumi IX": Konferences referātu tēzes, Valmieras muzejs, 2023. gada 1.–2. decembris
(2023)Starptautisko konferenci “Jauno vēsturnieku zinātniskie lasījumi IX” rīko Latvijas Universitātes Latvijas vēstures institūts un Valmieras muzejs, sadarbībā ar Vītauta Dižā Universitāti Kauņā, Lietuvas Vēstures institūtu ... -
Jauno vēsturnieku zinātniskie lasījumi, VIII
(2023)Izdevumā publicēti 19 raksti, kuru pamatā ir 2022. gada 24. un 25. novembrī Latvijas Universitātes (LU) Latvijas vēstures institūta un Valmieras muzeja sadarbībā ar Vītauta Dižā Universitāti Kauņā, Lietuvas Vēstures institūtu ... -
Examining the Effect of Cu and Mn Dopants on the Structure of Zinc Blende ZnS Nanopowders
(MDPI, 2023)It is known that doping zinc sulfide (ZnS) nanoparticles with Mn or Cu ions significantly affects their luminescent properties. Herein, we investigated how dopant atoms are incorporated into the structure of ZnS using X-ray ... -
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 ... -
Local structure and magnetic properties of a nanocrystalline Mn-rich Cantor alloy thin film down to the atomic scale
(Springer, 2023)The huge atomic heterogeneity of high-entropy materials along with a possibility to unravel the behavior of individual components at the atomic scale suggests a great promise in designing new compositionally complex systems ... -
Sarežģītais mantojums: holokausta vietas Latvijā tūrisma un atmiņas kultūras mijiedarbībā
(LU Akadēmiskais apgāds, 2023-05-30)Recenzētā zinātniskā kolektīvā monogrāfija tapusi Latvijas Zinātnes padomes finansētā Fundamentālo un lietišķo pētījumu projektā “Sarežģītais vēsturiskais mantojums Latvijā: holokausta tūrisma vietas starp piemiņas kultūru, ... -
Development of Bi2S3 thin film solar cells by close-spaced sublimation and analysis of absorber bulk defects via in-depth photoluminescence analysis
(Elsevier, 2023)The emergence of new PV applications in society requires the design of new materials and devices based on green and earth-abundant elements, with a different set of properties and wider applicability. In this perspective, ... -
Antiviral efficacy of nanomaterial-treated textiles in real-life like exposure conditions
(Elsevier, 2023)Due to the growing interest towards reducing the number of potentially infectious agents on critical high-touch surfaces, the popularity of antimicrobially and antivirally active surfaces, including textiles, has increased. ... -
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 ... -
Synthesis, magnetoresistance, and thermoelectrical properties of environmentally stable n-type nitrogen-doped multiwalled carbon nanotubes
(Elsevier, 2023)Nitrogen-doped multiwalled carbon nanotubes (N-MWCNTs) are known as a perspective material for a variety of applications in nanoelectronic devices, sensors, catalysts for carbon dioxide reduction, and flexible thermoelectrics. ...