Articole din publicaţii internaţionale: Recent submissions

  • Cathodoluminescence of TiO2 nanotubes prepared by low-temperature anodization of Ti foils 
    ENACHI, Mihai; STEVENS-KALCEFF, Marion; TIGINYANU, Ion; URSAKI, Veaceslav (ELSEVIER, 2010)
    We show that anodization of Ti sheets in an ethylene glycol and HF containing electrolyte at temperatures under 0°C results in the formation of a self-arranged ordered porous structure at the top surface of the sample. ...
  • Vibrational study of HgGa2S4 under high pressure 
    VILAPLANA, R.; ROBLEDILLO, M.; GOMIS, O.; SANS, J. A.; MANJÓN, F. J.; PÉREZ-GONZÁLEZ, E.; RODRÍGUEZ-HERNÁNDEZ, P.; MUÑOZ, A.; TIGINYANU, I. M.; URSAKI, V. V. (American Institute of Physics, 2013)
    In this work, we report on high-pressure Raman scattering measurements in mercury digallium sulfide (HgGa2S4) with defect chalcopyrite structure that have been complemented with lattice dynamics ab initio calculations. Our ...
  • Focusing effect of photonic crystal concave lenses made from porous dielectrics 
    SERGENTU, V. V.; FOCA, E.; LANGA, S.; CARSTENSEN, J.; FÖLL, H.; TIGINYANU, I. M. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2004)
    In the present paper we show the photonic band structure and transmittance spectra of photonic crystal (PC) consisting of porous dielectric and compare the results with the earlier published. Frequency ranges, where PC can ...
  • Structural and optical high-pressure study of spinel-type MNIN2S4 
    MANJÓN, F. J.; SEGURA, A.; AMBOAGE, M.; PELLICER-PORRES, J.; SÁNCHEZ-ROYO, J. F.; ITIÉ, J. P.; FLANK, A. M.; LAGARDE, P.; POLIAN, A.; URSAKI, V. V.; TIGINYANU, I. M. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2007)
    We report a combined study of the structural and electronic properties of the spinel-type semiconductor MnIn2S4 under high pressures by means of X-ray diffraction (ADXRD), X-ray absorption (XAS), and optical absorption ...
  • Design of negative-refractive-index materials on the basis of rods with a gradient of the dielectric constant 
    SERGENTU, V. V.; URSAKI, V. V.; TIGINYANU, I. M.; FOCA, F.; FÖLL, H.; BOYD, Robert W. (American Institute of Physics, 2007)
    The authors propose an approach to the design of negative-refractive-index materials based on the use of dielectric rods with a gradient of the dielectric constant. A triangular-lattice photonic crystal assembled from ...
  • Lattice dynamics study of HgGa2Se4 at high pressures 
    VILAPLANA, R.; GOMIS, O.; MANJÓN, F. J.; ORTIZ, H.; PÉREZ-GONZÁLEZ, E.; LÓPEZ-SOLANO, J.; RODRÍGUEZ-HERNÁNDEZ, P.; MUÑOZ, A.; ERRANDONEA, D.; URSAKI, V. V.; TIGINYANU, I. M. (American Chemical Society, 2013)
    We report on Raman scattering measurements in mercury digallium selenide (HgGa2Se4) up to 25 GPa. We also performed, for the low-pressure defect-chalcopyrite structure, lattice-dynamics ab initio calculations at high ...
  • Ultra-lightweight pressure sensor based on graphene aerogel decorated with piezoelectric nanocrystalline films 
    DRAGOMAN, Mircea; GHIMPU, Lidia; OBREJA, Cosmin; DINESCU, Adrian; PLESCO, Irina; DRAGOMAN, Daniela; BRANISTE, Tudor; TIGINYANU, Ion (IOP Publishing, 2016)
    In this paper, we report on a pressure sensor based on graphene aerogel functionalized with SnO2 or GaN thin films deposited by magnetron sputtering. Decoration by nanocrystalline SnO2 or GaN was found to enhance the ...
  • Porosity-induced gain of luminescence in CdSe 
    MONAICO, E.; URSAKI, V. V.; URBIETA, A.; FERNÁNDEZ, P.; PIQUERAS, J.; BOYD, R. W.; TIGINYANU, I. M. (IOP Publishing, 2004)
    Porous CdSe layers have been produced by anodic etching of crystalline substrates in a HCl solution. Anodization under in situ UV illumination resulted in the formation of uniformly distributed parallel pores with a diameter ...
  • Fröhlich vibrational modes in porous ZnSe studied by Raman scattering and Fourier transform infrared reflectance 
    IRMER, G.; MONAICO, E.; TIGINYANU, I. M.; GÄRTNER, G.; URSAKI, V. V.; KOLIBABA, G. V.; NEDEOGLO, D. D. (IOP Publishing, 2009)
    Arrays of parallel pores with a diameter of around 60 nm have been introduced by anodic etching in ZnSe single crystals with a free electron concentration of 4 × 1017 cm−3. Porosity-induced Fröhlich vibrational modes were ...
  • X-ray diffraction study on pressure-induced phase transformations and the equation of state of ZnGa2Te4 
    ERRANDONEA, D.; KUMAR, R. S.; GOMIS, O.; MANJÓN, F. J.; URSAKI, V. V.; TIGINYANU, I. M. (AIP Publishing LLC, 2013)
    We report on high-pressure x-ray diffraction measurements up to 19.8 GPa in zinc digallium telluride (ZnGa2Te4) at room temperature. An irreversible structural phase transition takes place at pressures above 12.1 GPa and ...
  • Temperature dependence of Raman scattering in porous gallium phosphide 
    URSAKI, V. V.; TIGINYANU, I. M.; RICCI, P. C.; ANEDDA, A.; FOCA, E. V.; SYRBU, N. N. (IOP Publishing, 2001)
    Porous layers fabricated by electrochemical anodization of (111)A-oriented n-GaP:Te substrates were studied by Raman scattering spectroscopy in the temperature interval from 10 to 300 K. Along with the transverse-optical ...
  • Enhanced radiation hardness of ZnO nanorods versus bulk layers 
    BURLACU, A.; URSAKI, V. V.; LINCOT, D.; SKURATOV, V. A.; PAUPORTE, T.; RUSU, E.; TIGINYANU, I. M. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2008)
    It is shown that ZnO nanorods grown by MOCVD exhibit enhanced radiation hardness against high energy heavy ion irradiation as compared to bulk layers. The decrease of the luminescence intensity induced by 130 MeV Xe+23 ...
  • WEB GIS solution for urban planning documentation workflow 
    NISTOR-LOPATENCO, Livia; IACOVLEV, Andrei (EDP Sciences, 2020)
    The goal of this work is to study the use of WEB GIS open source solution for workflow organizing of urban planning documentation: zoning permit, building permit, occupancy permit, utilities connection. A web GIS solution ...
  • Conductivity of nanoporous InP membranes investigated using terahertz spectroscopy 
    MERCHANT, S. K. E.; LLOYD-HUGHES, J.; SIRBU, L.; TIGINYANU, I. M.; PARKINSON, P.; HERZ, L. M.; JOHNSTON, M. B. (IOP Publishing, 2008)
    We have investigated the terahertz conductivity of extrinsic and photoexcited electrons in nanoporous indium phosphide (InP) at different pore densities and orientations. The form of electronic transport in the film was ...
  • Aspecte privind dezvoltarea și funcționalitatea limbajului vizual în comunicarea și formarea estetică 
    HADJI-BANDALAC, Mariana ("Print-Caro" SRL, 2019)
    The development of visual language is an important component side of educational process of architect students of Technical University of Moldova, being also a necessity in both visual teaching and communication. Forming ...
  • Planificarea managerială în mentenanţa din industria uşoară 
    PRODAN, Rodica ("Print-Caro" SRL, 2019)
    This paper represents an overview of the maintenance of the equipment used in the production process of Moldovan light industry enterprises. It reflects the economic essence of maintenance, the importance and content of ...
  • Terahertz photoconductivity of mobile electrons in nanoporous InP honeycombs 
    LLOYD-HUGHES, J.; MERCHANT, S. K. E.; SIRBU, L.; TIGINYANU, I. M.; JOHNSTON, M. B. (American Physical Society, 2008)
    Nanostructured semiconductors with favorable optoelectronic properties can be created by electrochemical etching, a fabrication process that is scalable for mass market applications. Using terahertz photoconductivity ...
  • Latura întunecată a stării de bine spre o creștere pozitivă 
    SIMION, Simion Dănuţ ("Print-Caro" SRL, 2019)
    I don't think there is a man on this earth who doesn't want to be happy. Tens of thousands of books in all possible languages give us tips on how to be happy and think positive. In the market, on the street or at the ...
  • On computer aided knowledge discovery in logic and related Areas 
    RUSU, Andrei; RUSU, Elena ("VALINEX" SRL, 2016)
    The present paper describes the architecture of a software for computer aided knowledge discovery dealing with the problems of functional expressibility of formulas in a nonstandard propositional logic. The achieved system ...
  • Nonlinear pressure dependence of the direct band gap in adamantine ordered-vacancy compounds 
    MANJÓN, F. J.; GOMIS, O.; RODRÍGUEZ-HERNÁNDEZ, P.; PÉREZ-GONZÁLEZ, E.; MUÑOZ, A.; ERRANDONEA, D.; RUIZ-FUERTES, J.; SEGURA, A.; FUENTES-CABRERA, M.; TIGINYANU, I. M.; URSAKI, V. V. (American Physical Society, 2010)
    A strong nonlinear pressure dependence of the optical absorption edge has been measured in defect chalcopyrites CdGa2Se4 and HgGa2Se4. The behavior is due to the nonlinear pressure dependence of the direct band-gap energy ...

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