• Variation of Nonlinear Refraction and Three-Photon Absorption of Indium–Tin Oxide Quantum Dot Thin Films and Solutions in Near Infrared Range 

  Bundulis, Arturs; Berzina, Anete; Kim, Vyacheslav V.; Polyakov, Boris; Novikovs, Aleksandrs; Ganeev, Rashid A. (MDPI, 2023)

  We characterize the nonlinear optical properties of indium–tin oxide (ITO) quantum dots (QDs) in the IR range using the Z-scan method. We present results of three-photon absorption (3PA), third harmonic generation (3HG), ...

• Ultrafast Laser Writing in Different Types of Silica Glass 

  Lei, Yuhao; Wang, Huijun; Skuja, Linards; Kühn, Bodo; Franz, Bernhard; Svirko, Yuri; Kazansky, Peter. G. (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 ...

• Ultraviolet Exposure Improves SERS Activity of Graphene-Coated Ag/ZrO2 Substrates 

  Bandarenka, Hanna; Burko, Aliaksandr; Laputsko, Diana; Dronina, Lizaveta; Kovalchuk, Nikolai; Podelinska, Alise; Shapel, Uladzislau; Popov, Anatoli I.; Bocharov, Dmitry (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 ...

• Tribological and Micromechanical Properties of the Nanostructured Carbonitride/Nitride Coatings of Transition Metals Alloyed by Hf and Nb 

  Leitans, Armands; Jansons, Ernests; Lungevics, Janis; Kundzins, Karlis; Boiko, Irina; Kanders, Uldis; Kovalenko, Vladimirs; Linins, Oskars (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 ...

• Thermoluminescent and Dosimetric Properties of Zirconium Dioxide Ceramics Irradiated with High Doses of Pulsed Electron Beam 

  Nikiforov, Sergey; Dauletbekova, Alma; Gerasimov, Maksim; Kasatkina, Yana; Denisova, Olga; Lisitsyn, Viktor; Golkovski, Mikhail; Akylbekova, Aiman; Bazarbek, Assyl-Dastan; Akilbekov, Abdirash; Popov, Anatoli I. (MDPI, 2023)

  Thermoluminescent (TL) properties of monoclinic zirconium dioxide ceramics were studied in order to assess the possibility of their use for measuring high doses (on the order of kGy) of pulsed electron beams (130 keV). Two ...

• Thermal Oxidation of Tungsten Coatings for Detection by Infrared Spectrometry Method 

  Goldmane, Annija Elizabete; Avotina, Liga; Vanags, Edgars; Trimdale-Deksne, Aija; Zaslavskis, Aleksandrs; Kizane, Gunta; Dekhtyar, Yuri (IOP Publishing, 2023)

  Physical vapor deposition (PVD) of metallic thin films is used extensively in the fabrication of semiconductor technology devices - use as of lately for them have grown. Tungsten (W) is a low resistivity, refractory metal, ...

• Temperature and E-Poling Evolution of Structural, Vibrational, Dielectric, and Ferroelectric Properties of Ba1−xSrxTiO3 Ceramics (x = 0, 0.1, 0.2, 0.3, 0.4 and 0.45) 

  Suchanicz, Jan; Sitko, Dorota; Stanuch, Krzysztof; Swierczek, Konrad; Jagło, Grzegorz; Kruk, Andrzej; Kluczewska-Chmielarz, Kamila; Konieczny, Krzysztof; Czaja, Piotr; Aleksandrowicz, Jakub; Wieczorek, Wojciech; Grygierek, Justyna; Sokolowski, Mariusz; Stachowski, Grzegorz; Antonova, Maija; Sternberg, Andris (MDPI, 2023)

  Lead-free Ba1−xSrxTiO3 (BST) (x = 0, 0.1, 0.2, 0.3, 0.4 and 0.45) ceramics were successfully prepared via the solid-state reaction route. A pure perovskite crystalline structure was identified for all compositions by X-ray ...

• The Impact of Graphene in Na2FeP2O7/C/Reduced Graphene Oxide Composite Cathode for Sodium-Ion Batteries 

  Nesterova, Inara; Britala, Liga; Sarakovskis, Anatolijs; Kruze, Beate; Bajars, Gunars; Kucinskis, Gints (MDPI, 2023)

  This study presents a thorough investigation of Na2FeP2O7 (NFP) cathode material for sodium-ion batteries and its composites with carbon and reduced graphene oxide (rGO). Our findings demonstrate that rGO sheets improve ...

• Synthesis of NaYF4:Yb3+, Tm3+ Nanocrystals Via the Thermal Decomposition Method Using Refined Sunflower Oil 

  Smelkovs, Lukass; Vīksna, V.; Teterovskis, Janis; Grube, Jurgis (Sciendo, 2023)

  In recent years, up-conversion luminescence nanoparticles have attracted significant attention from researchers in fields such as analytical chemistry (for example qualitative and quantitative analysis of metal and non-metal ...

• Study of Metal Leaching from Printed Circuit Boards by Improved Electrochemical Hydrochlorination Technique Using Alternating Current 

  Serga, Vera; Zarkov, Aleksej; Shishkin, Andrei; Elsts, Edgars; Melnichuks, Maksims; Maiorov, Mikhail; Blumbergs, Ervins; Pankratov, Vladimir (MDPI, 2023)

  This paper presents the results of the leaching of metals from computer PCBs by electrochemical hydrochlorination using alternating current (AC) with an industrial frequency (50 Hz). Leaching was carried out with a ...

• Selective Patterned Growth of ZnO Nanoneedle Arrays 

  Mihailova, I.; Krasovska, M.; Sledevskis, E.; Gerbreders, V.; Mizers, V.; Bulanovs, A.; Ogurcovs, Andrejs (Sciendo, 2023)

  Nanostructured coatings are widely used to improve the sensitivity of various types of sensors by increasing the active surface area compared to smooth films. However, for certain applications (in some cases), it may be ...

• NV microscopy of thermally controlled stresses caused by thin Cr2O3 films 

  Berzins, Andris; Smits, Janis; Petruhins, Andrejs; Rimsa, Roberts; Mozolevskis, Gatis; Zubkins, Martins; Fescenko, Ilja (Optica Publishing Group, 2023)

  Many modern applications, including quantum computing and quantum sensing, use substrate-film interfaces. Particularly, thin films of chromium or titanium and their oxides are commonly used to bind various structures, such ...

• 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 

  Arslan, H.; Aulika, Ilze; Sarakovskis, Anatolijs; Bikse, Liga; Zubkins, Martins; Azarov, A.; Gabrusenoks, Jevgenijs; Purans, Juris (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 ...

• Proton migration barriers in BaFeO3−δ – insights from DFT calculations 

  Hoedl, M. F.; Chesno, Andrei; Gryaznov, Denis; Merkle, R.; Kotomin, Eugene A.; Maier, J. (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 ...

• Post deposition annealing effect on properties of CdS films and its impact on CdS/Sb2Se3 solar cells performance 

  Gopi, Sajeesh Vadakkedath; Spalatu, Nicolae; Basnayaka, Madhawa; Katerski, Atanas; Josepson, Raavo; Grzibovskis, Raitis; Vembris, Aivars; Krautmann, Robert; Krunks, Malle; Acik, Ilona Oja (Frontiers Media, 2023)

  Antimony selenide (Sb2Se3) is one of the emerging photovoltaic absorber materials possessing abundance and non-toxicity as the main attributes. Following CdTe technology, CdS is a widely used partner layer for Sb2Se3 solar ...

• Nanomechanical and Electrochemical Corrosion Testing of Nanocomposite Coating Obtained on AZ31 via Plasma Electrolytic Oxidation Containing TiN and SiC Nanoparticles 

  Singh, Ashish Kumar; Drunka, Reinis; Smits, Krisjanis; Vanags, Martins; Iesalnieks, Mairis; Joksa, Aiga Anna; Blumbergs, Ilmars; Steins, Ints (MDPI, 2023)

  Lightweight magnesium alloys offer excellent benefits over Al alloys due to their high specific strength and damping properties, but they are more prone to galvanic corrosion. Plasma electrolytic oxidation (PEO) coatings ...

• Non-Enzymatic Co3O4 Nanostructure-Based Electrochemical Sensor for H2O2 Detection 

  Mizers, V.; Gerbreders, V.; Krasovska, M.; Sledevskis, E.; Mihailova, I.; Ogurcovs, Andrejs; Bulanovs, A.; Gerbreders, Andrejs (Sciendo, 2023)

  This article describes the synthesis of nanostructured cobalt oxide on iron wires and its application for the detection of hydrogen peroxide as working electrode for non-enzymatic electrochemical sensor. Cobalt oxide was ...

• LIBS plasma in atmospheric pressure argon, nitrogen and helium: Spatio-temporal distribution of plume emission and Hα linewidth 

  Jogi, Indrek; Ristkok, Jasper; Butikova, Jelena; Raud, Jüri; Paris, Peeter (Elsevier, 2023)

  Laser Induced Breakdown Spectroscopy (LIBS) method is considered for assessing the retention of hydrogen isotopes in the ITER plasma-facing components during the maintenance breaks when the reactor is filled with near ...

• Micromechanical Properties of Gd3Ga5O12 Crystals Irradiated with Swift Heavy Ions 

  Aralbayeva, G.M.; Manika, Ilze; Karipbayev, Zh.; Suchikova, Y.; Kovachov, S.; Sugak, D.; Popov, Anatoli I. (Sumy State University, 2023)

  This study investigated the optical absorption and mechanical behavior of Gd3Ga5O12 (GGG) single crystals exposed to fast 84 Kr ions at fluences ranging from 1013 to 1014 ion/cm2. We observed that the optical absorption ...

• Intrinsic Photoconductivity Spectral Dependence as a Tool for Prediction of Open-Circuit Voltage in Organic Solar Cells 

  Grzibovskis, Raitis; Polaks, Andis; Vembris, Aivars (MDPI, 2023)

  Organic materials are known for their variety of molecules. Methods to predict the parameters of organic photovoltaic (OPV) cells are required to avoid the time- and resource-consuming processes of manufacturing and testing ...

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