Browsing by Subject "nanocrystals"

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  • Aerosol Spray Deposited Wurtzite ZnMgO Alloy Films with MgO Nanocrystalline Inclusions 
    MORARI, Vadim; RUSU, E. V.; URSAKI, V. V.; NIELSCH, K.; TIGINYANU, I. M. (Springer, Cham, 2022)
    In this paper Zn1-xMgxO thin films with composition range x = 0.00–0.80 have been obtained by aerosol spray deposition method on p-Si substrates by using zinc acetate and magnesium acetate as precursors. The produced thin ...
  • CdSe Quantum Dots and SBMA/CdSe Nanocomposites Characterization by Optical and 2D DOSY NMR Methods 
    GERU, I. I.; BORDIAN, O. T.; CULEAC, I. P.; VERLAN, V. I. (Horizon Research Publishing, 2015)
    We present experimental results on preparation and characterization of colloidal CdSe quantum dots (QDs) and polymer nanocomposite based on them. CdSe QDs were characterized by UV absorbance and visible photoluminescence ...
  • 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 ...
  • Excitonic polaritons in ZnAs2 
    ZALAMAI, V. V.; SYRBU, N. N.; STAMOV, I. G. (Institutul de Fizică Aplicată, 2016)
    Spectral dependences of normal and anomaly dispersions of refractive index were calculated from interferential reflection and transmission spectra. It was shown, that A and B excitonic series were due to by hole V1 and ...
  • The growth and characterization of IrO2 1D nanocrystals on sapphire substrates 
    KOROTCOV, Alexandru; HUANG, Ying-Sheng; TSAI, Dah-Shyang (Technical University of Moldova, 2005)
    Well-aligned IrO2 nanocrystals (NCs) have been grown on sapphire (SA) substrates by rf magnetron sputtering using Ir metal target. The surface morphology and structural properties of the as-deposited NCs were characterized ...
  • Improvement of SiO2(Ge)SiO2/Si Nanostructures by Low Dose γ-radiation 
    SHISHIYANU, S. T.; SHISHIYANU, T. S.; YILMAZ, E.; TURAN, R.; MOGADDAM, N. A. P. (Technical University of Moldova, 2011)
    Effect of γ – radiation on SiO2(Ge)SiO2/Si nanostructures structural defects was investigated by C-V measurements characterization. The obtained results demonstrated that by low dose γ-radiation (0.1Gy*150Gy) have been ...
  • Luminescent Properties on ZnO:Cr Nanocrystals and Thin Layers 
    GOGLIDZE, T.; DEMENTIEV, I.; GONCEARENCO, E.; NEDEOGLO, N.; IURIEVA, T.; NEDEOGLO, D. (Tehnica UTM, 2019)
    Both undoped and chromium doped zinc oxide nanocrystal powders are obtained by chemical deposition and hydrothermal methods. ZnO and ZnO:Cr thin layers on the surface of ZnSe and ZnSe:Cr samples, respectively, are obtained ...
  • Optical characteristics and high resolution 2D dosy NMR in CdSe quantum dots 
    GERU, I.; BORDIAN, O.; LOSHMANSKY, C.; CULEAC, I.; BARBA, A.; TURTA, C. (Institutul de Fizică Aplicată al AŞM, 2014)
    We present experimental results on preparation and characterization of colloidal CdSe QDs in organic solvent. Colloidal semiconductor QDs were prepared via a chemical route.
  • Optical properties of CuInSe2 nanocrystals prepared by electrical discharge induced chemistry in solution 
    TARASENKO, N.; NEVAR, A.; TARASENKA, N.; SVITSIANKOU, I.; PAULOUSKI, V. (Tehnica UTM, 2019)
    The paper discusses the results of characterization of CuInSe2 (CIS) nanocrystals (NCs) synthesized by plasma treatment of a stoichiometric mixture of copper, indium, and selenium micropowders in an electric discharge ...
  • Photoluminescente properties of Eu(o-MBA)3Phen organic compound embedded in PEPC polymer matrix 
    BORDIAN, O.; VERLAN, V.; CULEAC, I.; IOVU, M.; ZUBAREVA, V. (National Institute of Optoelectronics, Romania, 2017)
    We report preparation and characterization of new nanocomposite material based on oligomers poly-N-propyl carbazole (PEPC) and the organic compound Eu(o-MBA)3Phen, where o-MBA – ortho-methylbenzoic acid, Phen – phenanthroline. ...
  • Preparation and Characterization of CdSe Colloidal Quantum Dots by Optical Spectroscopy and 2D DOSY NMR 
    GERU, I.; BORDIAN, O.; CULEAC, I.; TURTA, C.; VERLAN, V.; BARBA, A. (SPIE, 2015)
    We present experimental results on preparation and characterization of colloidal CdSe quantum dots (QD) in organic solvent. CdSe QDs were synthesized following a modified literature method and have been characterized by ...
  • Preparation and characterization of Ga2O3 and GaN nanoparticles 
    RUSU, E.; URSAKI, V.; RAEVSCHI, S.; VLAZAN, P. (Society of Photo-Optical Instrumentation Engineers, SPIE, 2015)
    In this communication, we present results on preparation of GaN nanoparticles by conversion of Ga2O3 nanocrystals in a flow of NH3 and H2. The monoclinic Ga2O3 nanoparticles have been prepared by hydrothermal method with ...
  • A rapid hydrothermal synthesis of rutile SnO2 nanowires 
    CRETU, V.; POSTICA, V.; MISHRA, A. K.; HOPPE, M.; TIGINYANU, I.; MISHRA, Y. K.; CHOW, L.; DE LEEUW, Nora H.; ADELUNG, R.; LUPAN, O. (The Royal Society of Chemistry, 2016)
    Synthesis, characterization and DFT studies of zincdoped copper oxide nanocrystals for gas sensing applications Due to their unique properties, p-type copper oxide nanostructures have demonstrated promising potential for ...
  • Semiconductor-oxide nanocomposites on the basis of porous semiconductors 
    SIRBU, Lilian; URSAKI, V. V.; TIGINYANU, I. M.; BOYD, R. W. (Institutul de Fizică Aplicată, AŞM, 2006)
    Over the last years, there has been considerable interest in optical properties of rare-earth-ion doped nanocrystals dispersed in a transparent medium as potential optoelectronic materials. This issue becomes especially ...
  • Spectroscopia polaritonilor excitonici în nanocristalele ZnAs2 
    STAMOV, I. G.; SYRBU, N. N.; URSAKI, V. V.; DOROGAN, A. V. (Universitatea Tehnică din Cluj-Napoca, 2017)
    Metoda spectroscopiei de rezoluţie înaltă propusă permite studiul dependenţelor spectrale ale dispersiei ordinare şi extraordinare a indicelui de refracţie pentru cristalele ZnAs2 în regiunea tranziţiilor excitonice. Metoda ...
  • Spectroscopia polaritonilor excitonici în nanocristalele ZnAs2 
    SÎRBU, N. N.; DOROGAN, A. V.; URSACHI, V. V.; STAMOV, I. G. (Agenţia de Stat pentru Proprietatea Intelectuală a Republicii Moldova (AGEPI), 2017)
    Este propusă o metodă a spectroscopiei de rezoluţie înaltă ce permite studiul dependenţelor spectrale ale dispersiei ordinare şi extraordinare a indicelui de refracţie pentru cristalele ZnAs2 în regiunea tranziţiilor ...
  • 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 ...
  • Technology and some optical proprieties of nanocomposites PEPC/CuPc 
    BORDIAN, O.; CULEAC, I.; IOVU, M.; VERLAN, V.; POPUSOI, A.; POPUSOI, M.; ROBU, St.; DRAGALINA, G.; SEPELI, D. (Institutul de Fizică Aplicată al AŞM, 2015)
    A new structural nanocomposite (NC) based on oligomer poly(N-epoxypropyl)carbazole (PEPC) and copper phthalocyanine (CuPc) nanocrystals on a glass substrate are prepared by casting and droplet methods under normal conditions ...
  • Up-conversion luminescence in GaSe nanocrystals 
    SYRBU, N. N.; STAMOV, I. G.; DOROGAN, A. V.; ZALAMAI, V. V. (Elservier, 2021)
    Optical properties of GaSe crystals have been investigated at wide temperature range from 10 to 300 K by help of reflection, absorption, and wavelength modulated reflection, and transmission spectra. Received data were ...
  • Новый способ синтеза нанокристаллов кубического углерода С8 
    СУХИНИНА, Н. С.; ЖОХОВ, А. А.; МАСАЛОВ, В. М.; ЗВЕРЬКОВА, И. И.; ХАСАНОВ, С. С.; ЕМЕЛЬЧЕНКО, Г. А.; ХОДОС, И. И. (Tehnica UTM, 2018)
    В данной работе мы синтезировали нанокристаллы (НК) кубического углерода С8 путем карбонизации и осаждения паров антрацена на различные подложки. Методами электронной микроскопии высокого разрешения и электронной дифракции ...

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