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Browsing Facultatea Calculatoare, Informatică şi Microelectronică by Author "URSAKI, Veaceslav"

Browsing Facultatea Calculatoare, Informatică şi Microelectronică by Author "URSAKI, Veaceslav"

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  • Comparative study of porosification in InAs, InP, ZnSe and ZnCdS 
    MONAICO, Eduard; TIGINYANU, Ion; NIELSCH, Kornelius; URSAKI, Veaceslav; COLIBABA, Gleb; NEDEOGLO, Dmitrii; COJOCARU, Ala; FÖLL, Helmut (Technical University of Moldova, 2013)
    We report on a comparative study of the pore growth during anodization of a narrow-bandgap III-V compound (InAs), a medium-bandgap III-V one (InP) and wide-bandgap II-VI semiconductors (ZnSe and Zn0,4Cd0,6S). According to ...
  • Electrochemical Nanostructuring of CuInS2 Bulk Crystals 
    MONAICO, Eduard; URSAKI, Veaceslav; ZALAMAI, Victor; MASNIK, Alisa; SYRBU, Nicolae; BURLACU, Alexandru (Technical University of Moldova, 2011)
    We show that chalcopyrite CuInS2 crystals can be nanostructured by electrochemical treatment in an aqueous HCl solution. In order the crystals to become suitable for electrochemical nanostructuring they are subjected to ...
  • Fabrication of Porous Nanostructures by Design 
    MONAICO, Eduard; MONAICO, Elena; URSAKI, Veaceslav; TIGINYANU, Ion (Technical University of Moldova, 2017)
    We report on the application of special design of masks for the purpose of electrochemical etching of InP single crystals which enables one to change in a controlled fashion the direction of propagation of pores, including ...
  • Influence of Metal Deposition on Electrochemical Impedance Spectra of Porous GaP and GaN Semiconductors 
    ANICAI, Liana; GOLGOVICI, Florentina; MONAICO, Eduard; URSAKI, Veaceslav; PRODANA, Mariana; ENACHESCU, Marius; TIGINYANU, Ion (Technical University of Moldova, 2017)
    A comparative analysis of electrochemical impedance spectroscopy (EIS) characterization is performed in porous GaN and GaP templates with and without metal nanostructured layers deposited by pulsed electroplating. The ...
  • Morphology and Luminescence Properties of ZnO layers produced by Magnetron Spattering 
    RUSU, Emil; GHIŢU, Irina; PRILEPOV, Vladimir; ZALAMAI, Victor; URSAKI, Veaceslav (Technical University of Moldova, 2011)
    We show that the morphology and the luminescence properties of ZnO layers produced by magnetron sputtering can be controlled by technological parameters of sputtering, particularly by the ratio of argon to oxygen gases in ...
  • Photoconductivity relaxation in nanostructured InP 
    POSTOLACHE, Vitalie; MONAICO, Eduard; BORODIN, Eugeniu; LUPAN, Oleg; URSAKI, Veaceslav; ADELUNG, Rainer; NIELSH, Kornelius; TIGINYANU, Ion (Tehnica UTM, 2014)
    We show that long-duration-photoconductivity decay (LDPCD) and persistent photoconductivity (PPC) in porous InP structures produced by anodization of InP substrates can be controlled through the control of their morphology. ...
  • Pulsed Electroplating of Metal Nanoparticles form DODUCO Electrolytes 
    MONAICO, Eduard; BRINCOVEANU, Oana; MESTERCA, Raluca; URSAKI, Veaceslav; PRODANA, Mariana; ENACHESCU, Marius; TIGINYANU, Ion (Technical University of Moldova, 2017)
    The mechanisms of Au deposition on InP porous substrates during a pulsed electroplating process are investigated by means of Topography imaging and Current Mapping measurements. The obtained results confirm the formation ...
  • Surface Plasmon Enhanced Luminescence from Ag covered Anatase Titania Nanotubes 
    ENACHI, Mihai; URSAKI, Veaceslav; SERGENTU, Vladimir (Technical University of Moldova, 2011)
    We show that coating of titania nanotubes by Ag layers with thickness of 5 – 20 nm leads to the increase of the near-bandgap photoluminescence intensity by one order of magnitude, while the effect of Au coatings is ...
  • TiO2 nanotubes doped by AG, AU and PT or covered BY AG, AU AND PT nanodotes and their application as nanomotors 
    ENACHI, Mihail; POSTOLACHE, Vitalie; URSAKI, Veaceslav; TIGINYANU, Ion (Tehnica UTM, 2014)
    An anodic oxidation of titanium foils in an electrolyte containing a mixture of hydrofluoric acid, ethylene glycol, and phosphoric acid was used to obtain titania nanotube arrays. The initially amorphous nanotubes were ...
  • Trends in Evolution of the Energy Band Structure of Chalcopyrite CuBIIIXVI2 Compounds with Variation of the B and X Compositions 
    MAŞNIC, Alisa; ZALAMAI, Victor; URSAKI, Veaceslav (Springer Nature Switzerland, 2023)
    Bulk and nanostructured AIBIIIXVI2 chalcopyrite materials, including quantum dots on their basis, are widely used in the development of optical filters, solar cells, optoelectronic devices and photocatalysis. Physical ...

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