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Browsing Articole din publicaţii internaţionale by Author "URSAKI, Veacheslav"

Browsing Articole din publicaţii internaţionale by Author "URSAKI, Veacheslav"

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  • Characterization of GaN thin films and Eu-doped GaN nanowires and nanoparticles produced on the basis of Ga2O3 nanomaterial 
    RUSU, Emil; URSAKI, Veacheslav; CULEAC, Ion; SIMINEL, Anatolii; RAEVSCHI, Simion; VLAZAN, Paulina; NICORICI, Alexandr (Academia de Ştiinţe a Moldovei, 2016)
    Due to advantageous properties such as wide bandgap, pronounced chemical and thermal stability, gallium nitride is currently considered as one of the most important semiconductor materials for practical applications. We ...
  • Characterization of p-NiO/n-Si heterojunctions prepared by spin coating method 
    MORARI, Vadim; ZALAMAI, Victor; RUSU, Emil; MONAICO, Eduard; URSAKI, Veacheslav; NIELSCH, Kornelius; TIGINYANU, Ion (Academia de Ştiinţe a Moldovei, 2019)
    In this paper, we present results on preparation of NiO thin films by spin-coating method. The films have been deposited on n-Si (100) substrates from 0.35 M aqueous solution of nickel chloride - NiCl2 *6H2 O or nickel ...
  • A comparative study of GaN and Ga2O3 nanocrystals obtained by hydrothermal and solid state phase reactions 
    RUSU, Emil; URSAKI, Veacheslav; SIMINEL, Anatolii; RAEVSCHI, Simion; VLAZAN, Paulina (Institutul de Fizică Aplicată, 2014)
    There is actually a considerable interest in the preparation of nanoparticles on the basis of semiconductor and oxide materials due to the influence of nanoparticle dimensionality upon their optical, radiative, and magnetic ...
  • Fresnel lens-type energy concentrator for space-based solar power systems 
    SERGENTU, Vladimir; URSAKI, Veacheslav; IOIŞER, Anatolii; ADAR, Eliezer (Romanian Academy Publishing House, 2018)
    In this paper a new concept of designing Fresnel lens concentrators on the basis of magnetic microwires with a complex spatial distribution of their density is proposed. The optical properties of microwires are analyzed ...
  • Injection photodiodes based on metal oxide semiconductors 
    MORARI, Vadim; URSAKI, Veacheslav; RUSU, Emil; TIGINYANU, Ion (Institutul de Inginerie Electronică şi Nanotehnologii "D. Ghiţu" al AŞM, 2020)
    A brief review of our recent research on injection photodiodes based on metal oxide semiconductors deposited onto Si substrates is presented. A series of ZnSnO, NiO, and Zn1-xMgxO thin films are prepared by aerosol spray ...
  • Morphology, optical and luminescence properties of ZnO layers doped with Al or Ag and co-doped with rare earth ions 
    ROGACHEV, Alexander; SEMCHEMKO, A.; GAISHUN, V.; RUSU, Emil; URSAKI, Veacheslav; CURMEI, Nicolai; ZALAMAI, Victor (Romanian Academy Publishing House, 2017)
    In this paper we propose a method for measuring the negative refraction index of films of optically transparent materials. Morphological, optical and luminescence properties of rare earth doped ZnO layers prepared by a ...
  • Mott type electrical conductivity in ZnSXSe1-x thin films 
    POPA, Mihail; TIGINYANU, Ion; URSAKI, Veacheslav (Romanian Academy Publishing House, 2017)
    Thin ZnSxSe1-x films on glass substrates have been obtained by thermal evaporation. Electrodes from In or other materials have been deposited on thin films, and the temperature dependence of electrical conductivity was ...
  • Nanostructured Film of Indium Phosphide as Biosensor in 1D Array Electrowetting System 
    SIRBU, Lilian; VODĂ, Irina; ESINENCO, Dorin; GANGAN, Sergiu; MULLER, Raluca; VOICU, Rodica Cristina; DǍNILǍ, Mihai; GHIMPU, Lidia; TIGINYANU, Ion; URSAKI, Veacheslav (Romanian Academy Publishing House, 2011)
    We demonstrated the fabrication of complex nanostructured InP membranes with porous compact packed structure that have been cut during electrochemical etching in the same anodic process. The membranes were filled with ...
  • Photocatalytic Properties of TiO2 Nanotubes Doped with Ag, Au and Pt or Covered by Ag, Au and Pt Nanodots 
    ENACHI, Mihail; GUIX, Maria; BRANIŞTE, Tudor; POSTOLACHE, Vitalie; CIOBANU, Vladimir; URSAKI, Veacheslav; SCHMIDT, Oliver G.; TIGINYANU, Ion (Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Republic of Moldova, 2015)
    Titania nanotube arrays have been prepared by anodic oxidation of titanium foils in an electrolyte solution containing a mixture of hydrofluoric acid, ethylene glycol, and phosphoric acid. The initially amorphous nanotubes ...
  • Raman scattering by porous structures with InAs quantum dots 
    MILEKHIN, Alexander; URSAKI, Veacheslav; SIRBU, Lilian; TOROPOV, Alexander; TIGINYANU, Ion; ZAHN, Dietrich R. T. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2009)
    In this paper we search for the possibilities of introducing porosity in InAs/AlAs/GaAs multilayer quantum dot structures as an additional tool for the modification of their phonon spectrum. Raman spectroscopy is used as ...
  • Scattering of a two-dimensional self-healing beam at the interface of a nanostructured medium with the vacuum 
    SERGENTU, Vladimir; URSAKI, Veacheslav (Romanian Academy Publishing House, 2018)
    In this paper the Fresnel’s formula are generalized to the case of a twodimensional (2D) self-healing beam incident on the interface of the vacuum with a nonmagnetic, homogeneous on average and isotropic nanostructured ...
  • Solar energy concentrators in geostationary orbits 
    SERGENTU, Vladimir; URSAKI, Veacheslav; IOIŞER, Anatolii; ADAR, Eliezer (Romanian Academy Publishing House, 2019)
    An important component of Space-based solar power (SBSP) systems is the solar energy concentrator that collects solar power in space and focusses it on solar cells or heat engines to produce electricity, which is consequently ...

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