UTM: Recent submissions

  • Modeling of Electronic Thermal Conductivity in Quasi-One-Dimensional Organic Crystals 
    CASIAN, Anatolie; BALMUS, Ion; DASHEVCKY, Zinovi; DUSCIAC, Viorel; DUSCIAC, Radu (Technical University of Moldova, 2009)
    The electronic thermal conductivity is modeled in quasi-one-dimensional organic crystals with the parameters of TCNQ chains in the TTF-TCNQ crystals. Two more important electron-phonon interactions and the scattering on ...
  • Implementarea litografiei cu sarcină de suprafaţă pentru mezo- şi nanostructurarea arseniurii de galiu 
    CORDUNEANU, Alexandru (Technical University of Moldova, 2009)
    În prezenta lucrare se demonstrează aplicabilitatea litografiei cu sarcina de suprafaţă la arseniura de galiu. Folosind metodologia acestei tehnologii pentru nitrura de galiu s-au obţinut mezastructuri de GaAs cu pereţi ...
  • Нанотехнологическая идентификация материальных ресурсов 
    БУЧАЦКИ, П.А.; РОТАРУ, О.М.; ТИГИНЯНУ, И.М.; ШКИЛЕВ, В.Д. (Technical University of Moldova, 2009)
    Предложен принципиально новый (нанотехнологический) подход к идентификации материальных ресурсов.
  • Artificial pinning centers on the MgB2 surface: the influence on the vortex flow in magnetic field 
    SURDU, A.; KOCH, Th.; ZDRAVKOV, V.; SOCROVISCHIUC, A.; PREPELITSA, A.; OBERMAIER, G.; WIXFORTH, A.; HAHN, H.; SIDORENKO, A. S. (Technical University of Moldova, 2009)
    Superconducting properties of high-quality films of the first multiband superconductor, magnesium diboride, have been investigated. The dominating role of thermally activated flux flow for the low parts of the superconducting ...
  • Nanostructuri de GaN în calitate de senzori de gaze 
    VOLCIUC, Olesea (Technical University of Moldova, 2009)
    În lucrare este prezentat răspunsul la gaze a nanostructurilor de GaN fabricate prin metoda Litografiei cu Sarcina de Suprafaţă. Sensibilitatea bună faţă de CO şi H2 precum şi timpurile mici de răspuns şi restabilire ...
  • Relaxarea de spin în monocristalele de antimonid de galiu dopate cu fier 
    GHEORGHIŢĂ, Eugen; ERMALAI, Felicia; CANŢER, Valeriu (Technical University of Moldova, 2009)
    In AIIIBV chemical combinations family, gallium antimonide is a material with unusual physical properties. Behavior of the transition elements like Iron, Chromium, Manganese, Nickel in various AIIIBV combinations is a ...
  • Observation of Quantum Oscillations in Single Crystal Bi Nanowires 
    KONOPKO, Leonid (Technical University of Moldova, 2009)
    We present here experimental measurements of Aharonov-Bohm (AB) oscillations on single Bi nanowires with diameter d < 80 nm. The single nanowire samples were prepared by Ulitovsky technique and represented cylindrical ...
  • Filiform nanoarchitectures consisting of arrays of highly integrated Bi nanowires in glass envelopes 
    POSTOLACHE, V.; IOISHER, A.; MONAICO, E.; BADINTER, E.; TIGINYANU, I.M. (Technical University of Moldova, 2009)
    Using a modified version of the Taylor method, we show the possibility to produce glass micro-cables comprising huge amounts of Bi nanowires in glass envelopes, each nanowire being electrically isolated from the neighbouring ...
  • High aspect ratio self ordered alumina nanotubes, SEM and EDX characterization 
    ENACHI, Mihail (Technical University of Moldova, 2009)
    Alumina nanotube and porous membranes were fabricated by anodic oxidation of 99.99 % aluminum foils in aqueous electrolytes containing orthophosphoric acids and nickel sulfate hydrate. This way, nanotubes and porous alumina ...
  • Comparison of Morphologies of Porous InP Layers Obtained in Different Electrolytes 
    SPRINCEAN, V.; COJOCARU, A.; MONAICO, E.; TIGINYANU, I.; FÖLL, H. (Technical University of Moldova, 2009)
    In this paper we present the possibility for nanostructuring of InP using an electrolyte based on aqueous solution of NaCl. A classical grow of columnar pores was obtained. In particular it was observed that there is no ...
  • Selective Photoreceivers with Modulated Sensibility 
    DOROGAN, Valerian; VIERU, Tatiana; VIERU, Stanislav; DOROGAN, Andrei (Technical University of Moldova, 2009)
    The paper presents new type of photoreceivers (photodiodes, photoresistor) on the basis of semiconductor heterostructures of III-V compounds. As distinct from classic devices elaborated photoreceivers possesses new functional ...
  • Porous morphologies in Si, III-V and II-VI compounds: a comparative study 
    LANGA, S.; MONAICO, E.; FÖLL, H.; TIGINYANU, I.M. (Technical University of Moldova, 2009)
    Porous morphologies obtained during the anodization of semiconductors are mainly determined by particular characteristics of the semiconductor-electrolyte interfaces and the bulk properties of the semiconductor itself. ...
  • Giant magnetoresistance and magnetothermopower in single-crystal Bi1-x Sbx wires 
    NIKOLAEVA, A.; BODIUL, P.; KONOPKO, L.; MOLOSHNIK, E.; POPOV, I. (Technical University of Moldova, 2009)
    A signicative increase in the transverse magnetoresistance and magnetothermopower in single-crystal Bi1-x Sbx wires obtained by liquid phase casting in the temperature range 80-100 K is found. A shift to the range of lower ...
  • Sinteza şi proprietăţile optice ale soluţiilor coloidale de nanocristalele de PbS 
    MITIOGLU, Anatolie; GAVRILUŢA, Anatolie; LASCOVA, Renata; GHERMAN, Cornel (Technical University of Moldova, 2009)
    The peculiarities of photoluminescence (PL) and optical absorption spectra of PbS nanocrystals (NC) were investigated. The PbS NCs were obtained in chloroform as well as aqueous colloidal solutions using different technologic ...
  • Surfactant-Assisted Synthesis of Lead Telluride Nanoparticles: Shape, Size, and Assembly 
    TODOSICIUC, A.; NICORICI, A.; GUTSUL, T.; GRAMM, F.; SHKLOVER, V. (Technical University of Moldova, 2009)
    Colloidal suspensions of PbTe nanoparticles coated with oleic acid (OA) were obtained using a high-temperature solution phase (HTSP) method. Diphenyl ether was used as a high-boiling heat-transfer agent. Nanoparticle size ...
  • Structura spectrelor de reflexie ale antimonidului de galiu dopat cu fier 
    GHEORGHIŢĂ, Eugen; ZLOTEA, Olga; UNTILĂ, Pantelei (Technical University of Moldova, 2009)
    In present paper it is analyzed the reflection spectra structure of nondoped gallium antimonide and gallium antimonide doped with iron in different concentrations at T=300K temperature. The investigated samples were obtained ...
  • Nonmonotonic behaviour of superconducting critical temperature of Nb/CuNi bilayers with a nanometer range of layer thickness 
    MORARI, R.; ZDRAVKOV, V. I.; ANTROPOV, E.; SOCROVISCIUC, A.; PREPELITA, A.; TAGIROV, L. R.; KUPRIYANOV, Mu. Yu.; SIDORENKO, A. S. (Technical University of Moldova, 2009)
    Present work reports the result of the proximity effect investigation for superconducting Nb/CuNi-bilayers with the thickness of the ferromagnetic layer (CuxNi1-x) being in the sub-nanometer range. It was found a non-monotonic ...
  • Infrared system for control of Postoffice Messages 
    SOCROVISCHIUC, A.; PREPELITSA, A.; COJOCARU, V.; SURDU, A.; ANTROPOV, E.; MORARI, R.; BANDURYAN, B.; BAZALEEV, M.; KLEPIKOV, V.; LYTVYNENKO, V.; SIDORENKO, A. (Technical University of Moldova, 2009)
    It is proposed a simultaneous method for treatment and control of potentially dangerous objects like viruses or explosives. Those methods are based on the prophylaxis irradiation and post irradiation IR-control.
  • Filters with Optical Isotropic Wavelength 
    SYRBU, N. N.; DOROGAN, A.; STAMOV, I. (Technical University of Moldova, 2009)
    In the present work it is presented the construction of Band-Pass-Mode Filter and Band –Elimination-Mode Filter used for decreasing the track of the excitation lines 536.7nm and 632.8nm, respectively, for Ar+ and He-Ne ...
  • Supraconductibilitate şi feromagnetism în bicristale şi tricristale ale aliajelor Bi-Sb 
    MUNTYANU, F. M.; CHISTOL, V. (Technical University of Moldova, 2009)
    Au fost studiate proprietăţile bicristalelor şi tricristalelor aliajelor Bi1-x - Sbx (x≤0.2) în intervalul de temperaturi (1.8 -100) K şi câmpuri magnetice de până la 70 kOe. S-a stabilit că la temperaturi joase bicristalele ...