Browsing 2013 by Issue Date

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  • Organic Nanostructured Material for Thermoelectric Sensors of Infrared Radiations 
    CASIAN, Anatolie; BALMUS, Ion; SANDULEAC, Ionel (Technical University of Moldova, 2013)
    Thermoelectric sensors of infrared radiation are widely used in the detectors of IR radiations, in the systems of night vision, in the thermometers for contactless measurement of temperature including the human body one, ...
  • Synthesis of Nanofibrous ZnO by Magnetron Sputtering and its Integration in Dye-Sensitized Solar Cells 
    GHIMPU, L.; PAUPORTE, T.; GUERIN, V. M.; LUPAN, O.; TIGINYANU, I. (Technical University of Moldova, 2013)
    This work demonstrates a cost-effective synthesis of nanofibrous ZnO layers by a magnetron sputtering. We present the results of layer characterization by scanning electron microscopy, X-ray diffraction, energy dispersive ...
  • Superhydrophobic Polytetrafluoroethylene Coated Micro-fluidic Chip for Bio-applications Integrated With THz Spectroscopy Technology 
    SIRBU, L.; GHIMPU, L.; MULLER, R.; VOICU, R.; DASCALU, T.; SERGENTU, V.; DOBLETBAEV, R.; URSAKI, V. (Technical University of Moldova, 2013)
    The hydrophobic properties were achieved for RF-sputtered ultra-thin polytetrafluoroethylene (PTFE) films deposited on silicon surfaces. In our investigation, super-hydrophobic surfaces with water contact angles higher ...
  • Birefringence and Excitonic Spectra of CdGa2S4 Crystals 
    STAMOV, I. G.; SYRBU, N. N.; PARVAN, V. I.; ZALAMAI, V. V. (Technical University of Moldova, 2013)
    The spectral dependence of Δn = no - ne of CdGa2S4 crystals in short- and long- wavelength part of isotropic wavelength λ0 = 485.7 nm (300 К) was determined. It was established what in the case when λ > λ0 Δn is positive ...
  • Luminescence of Single Crystals of Manganesedoped Zinc Indium Binary Sulfides 
    ARAMA, Efim; VOVC, Victor; GHEORGHITA, Eugene Iv.; PINTEA, Valentina (Technical University of Moldova, 2013)
    Radiative recombination spectra of Mn-doped zinc tioindat single crystals have been analyzed in the work. The emission spectra interval close to its maximum (1,91±0,2) eV contains a number of the special features which ...
  • The Device for Conversion and Displaying Ecological Information Using Sensors on the Base of ZnO Films 
    SHISHIANU, S.; VERJBITKI, V.; SHISHIANU, T.; MACHIDON, A. (Technical University of Moldova, 2013)
    Gas-sensors based on ZnO films give an opportunity to measure some parameters of gase-medium in a large band of temperature and pressure. In this article is described the device which allows measuring and imaging on display ...
  • Photoelectric Properties of Nanostuctured Layers 
    DOROGAN, Valerian; VIERU, Tatiana; VIERU, Stanislav; DOROGAN, Andrei (Technical University of Moldova, 2013)
    The paper is focused to study the photosensitivity modulation in crystalline and nanostructured materials. The photoresistor with modulated photosensitivity on the basis of III-V compounds was elaborated. In the results ...
  • Relaxation of Photoconductivity and Persistent Photoconductivity in TiO2 nanotubes 
    ENACHI, Mihail; BRANISTE, Tudor; BORODIN, Eugeniu; POSTOLACHE, Vitalie (Technical University of Moldova, 2013)
    Relaxation of photoconductivity is investigated in titania nanotubes produced by electrochemical treatment of Ti foils in organic electrolytes with subsequent thermal treatment at 400 oC in air. The photoconductivity was ...
  • Optical Properties of TlGaS2 Crystals 
    MASHNIC, A.; NEMERENCO, L.; SYRBU, N. N.; URSAKI, V. V.; ZALAMAI, V. V. (Technical University of Moldova, 2013)
    The anisotropy of transmission spectra was investigated in TlGaS2 crystals. An intensive transmission line was found in samples placed between two crossed polarizers. Ground and excited states of excitons were detected in ...
  • Raman Spectra of TiO2 Thin Films Deposited Electrochemically and by Spray Pyrolysis 
    SHISHIYANU, S.; STRATAN, Gh.; VARTIC, V.; ZARRELLI, M.; GIORDANO, M.; RUSU, E.; SHISHIYANU, T. (Technical University of Moldova, 2013)
    In this paper we present our experimental results concerning the fabrication of TiO2 thin films by spray pyrolysis and electrochemical deposition method onto different substrates – Corning glass, Si and optical fibers. The ...
  • Superconducting state in the twofold degenerate Anderson impurity model 
    MOSCALENCO, V. A.; DOHOTARU, L. A.; DIGOR, D. F.; CEBOTARI, I. D. (Technical University of Moldova, 2013)
    The twofold degenerated Anderson impurity model in superconducting state is investigated and the strong electronic correlations of impurity ion are taken into account by elaborating suitable diagram technique. We obtain ...
  • Porous vs. Magnetron RF Sputtering Of InP for Portable THz-TDS in Pharmaceutical and Medical Applications 
    SIRBU, L.; DANILA, M.; MULLER, R.; GHIMPU, L.; DOBLETBAEV, R.; DASCALU, T.; GRIGORE (SANDU), O.; SARUA, A.; URSAKI, V. (Technical University of Moldova, 2013)
    We developed a combination of technology for deposition contacts/wires upon nanoporous InP thin film structures and RF sputtering InP films. Indium phosphide (InP) films were deposited onto glass substrate using RF magnetron ...
  • PSpice Model of Hydrogen Nanosensors and Ultraviolet Photodetectors 
    POSTICA, Vasile; CREŢU, Vasilii; LUPAN, Oleg (Technical University of Moldova, 2013)
    In this work is presented PSpice circuit models of hydrogen gas nanosensor using individual zinc oxide nanowire with fast response at room temperature and of an individual ZnO microwire-based ultraviolet (UV) photodetector. ...
  • Reliability and Mechanism of Radiation Degradation of Microeletronic Devices 
    SHISHIYANU, Teodor (Technical University of Moldova, 2013)
    This review pape is destinated to investigation the mechanism and radiation degradation of microelectroic devices whith p-n junction, including Space Solar Cells (SSC) on the base of Si, GaAs, InP, InGaP/GaAs by using ...
  • CANopen Protocol for High Precision Ground Station Antenna Positioning 
    CANDRAMAN, Sergiu (Technical University of Moldova, 2013)
    The paper deal with high precision ground station antenna control and positioning using CANopen protocol. CANopen is designed for motion-oriented machine control networks, such as handling systems. The diagram of the antenna ...
  • The Effect of Size, Shape and Environment on Magnetic Properties of a Nanoparticle: microscopic model analysis 
    COJOCARU, Sergiu; DOHOTARU, Leonid; MOSCALENCO, Vsevolod (Technical University of Moldova, 2013)
    Our theoretical study of magnetic nanoparticles is based on an original analytic approach, which allows to track down the intrinsic mechanisms of the observed magnetic properties. In particular, it reveals some misleading ...
  • Properties of MoO3 Nanostructures Grown Via Thermal Oxidation 
    TROFIM, Viorel; CREŢU, Vasilii; LUPAN, Oleg; STAMOV, Ivan; SYRBU, Nicolae; ZALAMAI, Victor; CHOW, Lee (Technical University of Moldova, 2013)
    Metal oxides such as molybdenum oxide (MoO3) have been studied intensively as sensors and electrochromic systems during of the last decade. MoO3 nanowires present new properties at nanometer dimensions. Its structural, ...
  • Retroreflection from Nanoporous InP 
    PRISLOPSKI, S. Ya.; NAUMENKO, E. K.; TIGINYANU, I. M.; GHIMPU, L.; MONAICO, E.; SIRB, L.; GAPONENKO, S. V. (Technical University of Moldova, 2013)
    Pronounced retroreflection behavior is reported for a fishnet nanoporous strongly absorbing semiconductor material. Retroreflection appears with diffusive specular reflection for all angles of incidence. Retroreflection ...
  • Tachyon-like Spectrum of Electromagnetic Modes in the Case of Extremely Low Frequencies in a System of Nanopores 
    SERGENTU, Vladimir; OLEDNIC, Marin (Technical University of Moldova, 2013)
    In nanotechnology, porous materials play an important role in achieving new properties. In this work we examine the electromagnetic behavior of a system of cylindrical nanopores, aranged in a twodimmensional square lattice, ...
  • Comparative Study of Persistent Photoconductivity in GaP and GaN Nanostructures 
    POSTOLACHE, Vitalie (Technical University of Moldova, 2013)
    Relaxation of photoconductivity is investigated in bulk GaP and GaN substrates and epitaxial layers as compared to porous GaP samples and GaN nanomembranes. Porous GaP samples with different characteristic sizes of pores ...

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