Browsing Raksti konferenču krājumā un tēzes (CFI) / Conference Papers and Abstracts by Issue Date

Now showing items 21-30 of 30

    • Synthesis and studying of reduced few-layered graphene coatings in gas sensor applications 

      Lukosevics, Ingars; Lesnicenoks, Peteris; Kleperis, Janis (Institute of Physics Publishing, 2019)
      In this work reduced few-layered graphene (rFLG) nanoparticles were synthesized using electrochemical pulse exfoliation method from waste graphite crucibles. The regular change in voltage polarity in the synthesis process ...

    • Pressure-induced structural changes in α-MoO3 probed by X-ray absorption spectroscopy 

      Jonane, Inga; Anspoks, Andris; Nataf, Lucie; Baudelet, Francois; Irifune, Tetsuo; Kuzmin, Alexei (Institute of Physics Publishing, 2019)
      Energy-dispersive X-ray absorption spectroscopy at the Mo K-edge was used to study pressure-induced (up to 36 GPa) changes in the local atomic structure of 2D layered oxide α-MoO3. A linear combination analysis based on ...

    • Negative thermal expansion of ScF3: First principles vs empirical molecular dynamics 

      Bocharov, Dmitry; Rafalskij, Yuri; Krack, Matthias; Putnina, Mara; Kuzmin, Alexei (Institute of Physics Publishing, 2019)
      The crystal lattice of cubic scandium fluorine (ScF3) exhibits negative thermal expansion (NTE) over a wide range of temperatures from 10 K to 1100 K. Here the NTE effect in ScF3 is studied using atomistic simulations based ...

    • Nafion® and polyaniline composite modification with Li and Mg ions 

      Lozkins, Stanislavs; Hodakovska, Julija; Kleperis, Janis; Merijs - Meri, Remo (Institute of Physics Publishing, 2019)
      Modification of Nafion®-based samples with polyaniline (PANI) and positive charged ions could potentially allow achieving good proton conductivity at higher working temperatures what is observed in typical polymer electrolyte ...

    • Nanoporous characterization of modified humidity-sensitive MgO-Al2O3 ceramics by positron annihilation lifetime spectroscopy method 

      Klym, H.; Ingram, A.; Hadzaman, I.; Karbovnyk, I.; Vasylchyshyn, I.; Popov, Anatoli I. (Institute of Physics Publishing, 2019)
      Investigation of nanopores in the humidity-sensitive MgO-Al2O3 ceramics modified at 1100°C for 2 hours was performed using positron annihilation lifetime spectroscopy method. Lifetimes of the third and fourth components ...

    • Optimization of the enzyme power source for a nano drug delivery system fuelled by glucose in blood plasma 

      Naidoo, S.; Thage, L.; Ying, Q.; Vallie, S.; Vaivars, Guntars (Institute of Physics Publishing, 2019)
      A unique in vivo electrical pulse generator to improve membrane permeability for drugs and simultaneously facilitate self-powered nano devices for nano drug delivery systems (NDDS) was identified. The use of an unsupported ...

    • Investigations in intensification of grain drying by active ventilation applying ozone 

      Rucins, Adolfs; Viesturs, Dainis; Kristins, Alberts; Bruveris, Juris (Latvia University of Life Sciences and Technologies, 2020)
      The article presents an analysis of the previous research on the use of ozone for intensified active ventilation of grain and develops a methodology for experiments to evaluate the usefulness of ozone utilisation in ...

    • Studies of the possibilities to use ozone for the grain storage 

      Rucins, Adolfs; Straumite, Evita; Viesturs, Dainis; Kristins, Alberts (Rezekne Higher Education Institution, 2021)
      In this study was impact of ozone treatment efficiency of wheat quality (physical-chemical and microbiological parameters, chemical composition and germination rate) during storage analysed. Ozone is a powerful oxidizer, ...

    • Effect of Yb3+ doping level on the structure and spectroscopic properties of ZnO optical ceramics 

      Gorokhova, E.; Venevtsev, I.; Alekseeva, I.; Khubetsov, A.; Dymshits, O.; Basyrova, L.; Oreschenko, E.; Eron’ko, S.; Muktepavela, F.; Kundzins, K.; Zhilin, A.; Loiko, P. (Institute of Physics Publishing, 2021)
      Zinc oxide optical ceramics with hexagonal structure doped with 0.6 –5.0 wt% Yb were fabricated by uniaxial hot pressing of commercial oxide powders at 1180 °C in vacuum. The ceramics were characterized by X-ray diffraction, ...

    • 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, ...