Cietvielu fizikas institūts / Institute of Solid State Physics: Recent submissions

Отображаемые элементы 261-280 из 652

    • In Situ Study of Zinc Peroxide Decomposition to ZincOxide by X-Ray Absorption Spectroscopy and ReverseMonte Carlo Simulations 

      Kuzmin, Alexei; Pudza, Inga; Klementiev, Konstantin (Wiley, 2022)
      The Zn K-edge X-ray absorption spectroscopy is used to investigate in situ the decomposition of zinc peroxide ((Formula presented.)) to zinc oxide (ZnO). Principal component and linear combination analyses of the extended ...

    • Experimental Confirmation of C-Rate Dependent Minima Shifts in Arrhenius Plots of Li-Ion Battery Aging 

      Bozorgchenani, Maral; Kucinskis, Gints; Wohlfahrt-Mehrens, Margret; Waldmann, Thomas (The Electrochemical Society, 2022)
      Li-ion batteries show a minimum of their aging rate at a certain temperature. This minimum in the corresponding Arrhenius plot expresses the longest cycle life at a certain C-rate. By characterizing aging of laboratory-made ...

    • Effect of DNA Aptamer Concentration on the Conductivity of a Water-Gated Al:ZnO Thin-Film Transistor-Based Biosensor 

      Ogurcovs, Andrejs; Kadiwala, Kevon; Sledevskis, Eriks; Krasovska, Marina; Plaksenkova, Marina; Butanovs, Edgars (MDPI, 2022)
      Field-effect transistor-based biosensors (bio-FETs) are promising candidates for the rapid high-sensitivity and high-selectivity sensing of various analytes in healthcare, clinical diagnostics, and the food industry. ...

    • A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures 

      Mihailova, Irena; Gerbreders, Vjaceslavs; Krasovska, Marina; Sledevskis, Eriks; Mizers, Valdis; Bulanovs, Andrejs; Ogurcovs, Andrejs (Beilstein-Institut, 2022)
      This article describes the synthesis of nanostructured copper oxide on copper wires and its application for the detection of hydrogen peroxide. Copper oxide petal nanostructures were obtained by a one-step hydrothermal ...

    • Ab Initio Computations of O and AO as well as ReO2, WO2 and BO2-Terminated ReO3, WO3, BaTiO3, SrTiO3 and BaZrO3 (001) Surfaces 

      Eglitis, Roberts I.; Purans, Juris; Popov, Anatoli I.; Bocharov, Dmitry; Chekhovska, Anastasiia; Jia, Ran (MDPI, 2022)
      We present and discuss the results of surface relaxation and rumpling computations for ReO3, WO3, SrTiO3, BaTiO3 and BaZrO3 (001) surfaces employing a hybrid B3LYP or B3PW description of exchange and correlation. In ...

    • Inner relaxations in equiatomic single-phase high-entropy cantor alloy 

      Smekhova, Alevtina; Kuzmin, Alexei; Siemensmeyer, Konrad; Abrudan, Radu; Reinholz, Uwe; Buzanich, Ana Guilherme; Schneider, Mike; Laplanche, Guillaume; Yusenko, Kirill V. (Elsevier, 2022)
      The superior properties of high-entropy multi-functional materials are strongly connected with their atomic heterogeneity through many different local atomic interactions. The detailed element-specific studies on a local ...

    • Revealing the local structure of CuMo1−xWxO4 solid solutions by multi-edge X-ray absorption spectroscopy 

      Pudza, Inga; Anspoks, Andris; Aquilanti, Giuliana; Kuzmin, Alexei (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 ...

    • Untangling the controversy on Ce3+luminescence in LaAlO3crystals 

      Pejchal, Jan; Babin, Vladimir; Buryi, Maksym; Laguta, Valentyn; Hájek, František; Páterek, Juraj; Procházková-Prouzová, Lenka; Havlák, Lubomír; Czerneková, Vladimíra; Vaněček, Vojtěch; Doležal, Václav; Havlíček, Jan; Rubešová, Kateřina; Zemenová, Petra; Falvey, Alexandra; Král, Robert; Pankratov, Vladimir; Chernenko, Kirill (Royal Society of Chemistry, 2022)
      Aluminum perovskites represent an important group of promising scintillation materials with excellent proportionality and energy resolution, but due to difficulties in crystal growth not much attention has been paid to ...

    • Enhanced Electrochemical Properties of Na0.67MnO2 Cathode for Na-Ion Batteries Prepared with Novel Tetrabutylammonium Alginate Binder 

      Kucinskis, Gints; Kruze, Beate; Korde, Prasad; Sarakovskis, Anatolijs; Viksna, Arturs; Hodakovska, Julija; Bajars, Gunars (MDPI, 2022)
      Both the binder and solid-electrolyte interface play an important role in improving the cycling stability of electrodes for Na-ion batteries. In this study, a novel tetrabutylammonium (TBA) alginate binder is used to prepare ...

    • Excited States Calculations of MoS2@ZnO and WS2@ZnO Two-Dimensional Nanocomposites for Water-Splitting Applications 

      Lin, Yin-Pai; Polyakov, Boris; Butanovs, Edgars; Popov, Aleksandr A.; Sokolov, Maksim; Bocharov, Dmitry; Piskunov, Sergei (MDPI, 2022)
      Transition metal dichalcogenide (TMD) MoS2 and WS2 monolayers (MLs) deposited atop of crystalline zinc oxide (ZnO) and graphene-like ZnO (g-ZnO) substrates have been investigated by means of density functional theory (DFT) ...

    • The Relation between Photoconductivity Threshold and Open-Circuit Voltage in Organic Solar Cells 

      Grzibovskis, Raitis; Rudušs, Armands; Polaks, Andis (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 ...

    • Effects of Electron Correlation inside Disordered Crystals 

      Kruchinin, Sergei P.; Eglitis, Roberts I.; Babak, Vitaliy P.; Vyshyvana, Iryna G.; Repetsky, Stanislav P. (MDPI, 2022)
      We propose a novel approach for characterising the electron spectrum of disordered crystals constructed from a Hamiltonian of electrons as well as phonons and a diagram approach for Green’s function. The system’s electronic ...

    • Photophysical and Electrical Properties of Highly Luminescent 2/6-Triazolyl-Substituted Push-Pull Purines 

      Sebris, Armands; Novosjolova, Irina; Traskovskis, Kaspars; Kokars, Valdis; Tetervenoka, Natalija; Vembris, Aivars; Turks, Māris (American Chemical Society, 2022)
      New push-pull N(9)-alkylated 6-piperidino-2-triazolylpurine and 2-piperidino-6-triazolylpurine derivatives are synthesized, and their optical and optoelectronic properties are comprehensively characterized with experimental ...

    • Sol-gel assisted molten-salt synthesis of novel single phase Y3–2xCa2xTaxAl5−xO12:1%Eu garnet structure phosphors 

      Skruodiene, Monika; Juodvalkyte, Ruta; Inkrataite, Greta; Pakalniskis, Andrius; Ramanauskas, Rimantas; Sarakovskis, Anatolijs; Skaudzius, Ramunas (Elsevier Ltd, 2022)
      Strong absorption and emission are the key the features of any phosphor. The results obtained during this study demonstrate the difficulty of the incorporation of tantalum ions into the garnet structure and reveal that ...

    • Pulsed Electric Fields Alter Expression of NF-κB Promoter-Controlled Gene 

      Kavaliauskaite, Justina; Kazlauskaitė, Aukse; Lazutka, Juozas Rimantas; Mozolevskis, Gatis; Stirkė, Arunas (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 ...

    • Unraveling the Structure and Properties of Layered and Mixed ReO3–WO3 Thin Films Deposited by Reactive DC Magnetron Sputtering 

      Polyakov, Boris; Butanovs, Edgars; Ogurcovs, Andrejs; Sarakovskis, Anatolijs; Zubkins, Martins; Bikse, Liga; Gabrusenoks, Jevgenijs; Vlassov, Sergei; Kuzmin, Alexei; Purans, Juris (American Chemical Society, 2022)
      Tungsten trioxide (WO3) is a well-known electrochromic material with a wide band gap, while rhenium trioxide (ReO3) is a “covalent metal” with an electrical conductivity comparable to that of pure metals. Since both WO3 ...

    • Wood and Black Liquor-Based N-Doped Activated Carbon for Energy Application 

      Plavniece, Ance; Volperts, Aleksandrs; Dobele, Galina; Zhurinsh, Aivars; Kruusenberg, Ivar; Kaprans, Kaspars; Knoks, Ainars; Kleperis, Janis (Multidisciplinary Digital Publishing Institute (MDPI), 2021)
      Fuel cells, batteries and supercapacitors are critical to meet the rising global demand for clean, sustainable energy. Biomass-derived activated carbon can be obtained with tailored properties to fulfil the extensive need ...

    • Water Splitting on Multifaceted SrTiO3 Nanocrystals: Computational Study 

      Sokolov, Maksim; Mastrikov, Yuri A.; Zvejnieks, Guntars; Bocharov, Dmitry; Kotomin, Eugene A.; Krasnenko, Veera (Multidisciplinary Digital Publishing Institute (MDPI), 2021)
      Recent experimental findings suggest that strontium titanate SrTiO3 (STO) photocatalytic activity for water splitting could be improved by creating multifaceted nanoparticles. To understand the underlying mechanisms and ...

    • Vacancy defects in Ga2O3: First-principles calculations of electronic structure 

      Usseinov, Abay; Koishybayeva, Zhanymgul; Platonenko, Alexander; Pankratov, Vladimir; Suchikova, Yana; Akilbekov, Abdirash; Zdorovets, Maxim; Purans, Juris; Popov, Anatoli I. (Multidisciplinary Digital Publishing Institute (MDPI), 2021)
      First-principles density functional theory (DFT) is employed to study the electronic structure of oxygen and gallium vacancies in monoclinic bulk β-Ga2 O3 crystals. Hybrid exchange– correlation functional B3LYP within the ...

    • UV light induced processes in pure and doped AlN ceramics 

      Trinkler, Laima; Trukhin, Anatoli; Cipa, Janis; Berzina, Baiba (Elsevier, 2021)
      AlN ceramics samples, pure and doped with Y2O3, Eu2O3 and GaN, and produced from the same AlN powder, were studied for photoelectric effect, photoluminescence spectra and kinetics and thermoluminescence under irradiation ...