Browsing Zinātniskie raksti (CFI) / Scientific articles by Subject "Raman spectroscopy"

Now showing items 1-9 of 9

    • Ab Initio Study on the Vibrational and Electronic Properties of Radiation-Induced Defects in Potassium Bromide 

      Platonenko, Alexander; Pankratov, Vladimir; Kotomin, Eugene A.; Dauletbekova, Alma; Popov, Anatoli I. (MDPI, 2024)
      The vibrational and electronic properties of several basic radiation defects in potassium bromide are computed at the quantum mechanical level using a periodic supercell approach based on hybrid functionals, an all-electron ...

    • Effects of Pulsed Electric Field on the Physicochemical and Structural Properties of Micellar Casein 

      Taha, Ahmed; Casanova, Federico; Talaikis, Martynas; Stankevič, Voitech; Žurauskienė, Nerija; Šimonis, Povilas; Pakštas, Vidas; Jurkūnas, Marijus; Gomaa, Mohamed A. E.; Stirkė, Arūnas (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 ...

    • Low temperature structural transformations on the (001) surface of SrTiO 3 single crystals 

      Krainyukova, Nina V.; Hamalii, V. O.; Peschanskii, A. V.; Popov, Anatoli; Kotomin, Eugene A. (American Institute of Physics, 2020)
      The smooth (001) surfaces of SrTiO3 (STO) single crystals were investigated by the reflection high-energy electron diffraction method in the temperature range from 5.5 to 300 K. The Raman scattering confirmed the high ...

    • Magnon and Phonon Excitations in Nanosized NiO 

      Sildos, I.; Puust, L.; Grabis, J.; Mironova-Ulmane, Nina; Kuzmin, Alexei (Sciendo, 2019)
      Single-crystal, microcrystalline and nanocrystalline nickel oxides (NiO) have been studied by Raman spectroscopy. A new band at ~200 cm-1 and TO-LO splitting of the band at 350–650 cm-1 have been found in the spectra ...

    • Optical properties and structure particularities of LiNbO3 crystals grown from a boron-doped melt 

      Sidorov, Nikolay V.; Palatnikov, Mikhail N.; Teplyakova, Natalya А.; Titov, R. A.; Bormanis, Karlis Ya (Taylor and Francis Ltd., 2019)
      A series of LiNbO3:B crystals was grown from the melt doped by boron. It is shown that LiNbO3:B crystals possess an increased resistance to optical damage. We have found changes according to Raman spectra confirming the ...

    • The role of Ga and Bi doping on the local structure of transparent zinc oxide thin films 

      Correia, Filipe C.; Ribeiro, Joana M.; Kuzmin, Alexei; Pudza, Inga; Kalinko, Aleksandr; Welter, Edmund; Mendes, Adelio; Rodrigues, Joana; Ben Sedrine, Nabiha; Monteiro, Teresa; Correia, Maria Rosário; Tavares, Carlos J. (Elsevier, 2021-07-25)
      Transparent undoped ZnO and additionally doped with Ga and Bi thin films were produced by magnetron sputtering. The thin films were comprehensively characterized by X-ray absorption, X-ray diffraction (XRD), X-ray photoelectron ...

    • Synthesis and characterization of GaN/ReS2, ZnS/ReS2 and ZnO/ReS2 core/shell nanowire heterostructures 

      Butanovs, Edgars; Kuzmin, Alexei; Piskunov, Sergei; Smits, Krisjanis; Kalinko, Aleksandr; Polyakov, Boris (Elsevier B.V., 2021)
      Layered 2D van der Waals (vdW) materials such as graphene and transition metal dichalcogenides have recently gained a great deal of scientific attention due to their unique properties and prospective applications in various ...

    • Synthesis, structure and spectroscopic properties of luminescent GdVO4:Dy3+ and DyVO4 particles 

      Jovanovic, Dragana J.; Chiappini, Andrea; Zur, Lidia; Gavrilovic, Tamara V.; Lam Tran, Thi Ngoc; Chiasera, Alessandro; Lukowiak, Anna; Smits, Krisjanis; Dramicanin, Miroslav D.; Ferrari, Maurizio (Elsevier B.V., 2018)
      In this work, we focused on the syntheses, structure and spectroscopic properties of GdVO4:Dy3+ and DyVO4 (nano)particles of different sizes and shapes (spherical nanoparticles of 2 nm, 4 nm, and 20 nm in size, nanorods ...

    • X-ray absorption and Raman spectroscopy studies of tungstates solid solutions ZncNi1-cWO4 (c=0.0-1.0) 

      Bakradze, Georgijs; Kalinko, Aleksandr; Kuzmin, Alexei (AIP Publishing, 2020)
      The influence of thermal disorder and static distortions on the local structure in microcrystalline solid solutions of tungstates ZncNi1-cWO4 with c = 0.0–1.0 was investigated using temperature-dependent (10–300 K) x-ray ...