IRTUM – Institutional Repository of the Technical University of Moldova

Browsing Articole din publicaţii internaţionale by Subject "cathodoluminescence"

Browsing Articole din publicaţii internaţionale by Subject "cathodoluminescence"

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  • Biopolymer-assisted self-assembly of ZnO nanoarchitectures from nanorods 
    LUPAN, O.; CHOW, L.; CHAI, G.; SCHULTE, A.; PARK, S.; LOPATIUK-TIRPAK, O.; CHERNYAK, L.; HEINRICH, H. (ELSEVIER, 2008)
    We have investigated three-dimensional (3-D) architectures–microspheres and radial structures–based on biopolymer-assisted self-assembly from one-dimensional ZnO nanorods. The developed method is simple, rapid and ...
  • Cathodoluminescence and computer graphics in materials science 
    NAZAROV, M. V.; NAZAROVA, T. A. (John Wiley & Sons, Inc., 1994)
    The combination of cathodoluminescence (CL) in scanning electron microscopy (SEM) with computer graphics is proposed for studying semiconductors and dielectric materials. Spatial distribution of several types of defects ...
  • Cathodoluminescence characterization of rare earth doped composite materials based on porous GaP 
    SÁNCHEZ, B.; MÉNDEZ, B.; PIQUERAS, J.; SIRBU, L.; TIGINYANU, I. M.; URSAKI, V. V. (Springer Nature Switzerland, 2008)
    Porous GaP layers doped with erbium or europium elements have been obtained by electrochemical etching and further impregnation processes. The thermal treatments for optical activation of rare earth (RE) ions lead to partial ...
  • Cathodoluminescence characterization of suspended GaN nanomembranes 
    STEVENS-KALCEFF, M. A.; TIGINYANU, I. M.; POPA, V.; BRANISTE, T.; BRENNER, P. (AIP Publishing LLC, 2013)
    Continuous suspended ~15 nm thick gallium nitride (GaN) nano-membranes have been investigated using cathodoluminescence microanalysis. The GaN nanomembranes are fabricated by focused ion beam (FIB) pre-treatment of GaN ...
  • Color cathodoluminescence study of oxides subjected to thermal environments 
    NAZAROVA, T. A.; SAPARIN, G. V.; OBYDEN, S. K.; IVANNIKOV, P. I. (John Wiley & Sons, Inc., 1997)
    The behavior of cathodoluminescence (CL) from oxides associated with plastic deformation as well as with annealing at different temperatures and atmospheres has been examined. Observations using the real color CL (CCL) ...
  • Electrical characterization and cathodoluminescence microanalysis of AlN/GaN heterostructures 
    HUBBARD, S. M.; PAVLIDIS, D.; VALIAEV, V.; STEVENS-KALCEFF, M. A.; TIGINYANU, I. M. (ELSEVIER, 2002)
    Low-pressure MOCVD is used to grow AlN/GaN MIS-type heterostructures with AlN thickness between 3 and 35 nm. The two-dimensional electron gas (2DEG) Hall mobility was found to decrease with AlN thickness. The measured room ...
  • Enhanced Emission Properties of Anodized Polar ZnO Crystals 
    ZALAMAI, V. V.; COLIBABA, G. V.; MONAICO, E. I.; MONAICO, E. V. (Springer Nature Switzerland, 2021)
    Polar ZnO single crystals were microstructured in a controlled fashion by electrochemical etching. Surfaces with pyramids and inversed pyramids on oxygen and zinc faces, respectively, were received. Photoluminescence spectra ...
  • The Impact of Porosity upon the Cathodoluminescence from III-V Compounds 
    STEVENS-KALCEFF, M. A.; TIGINYANU, I. M.; LANGA, S.; FÖLL, H. (Cambridge University Press, 2002)
    The development of applications involving porous materials requires understanding of their special properties. Most published investigations have used photoluminescence (PL) techniques to determine the average emission ...
  • Microcharacterization of GaN Nanomembranes Using Cathodoluminescence Microanalysis 
    STEVENS-KALCEFF, Marion A.; TIGINYANU, I. M.; POPA, V. (ProQuest LLC, 2012)
    Gallium nitride (GaN) is a thermally stable, chemically inert wide-band-gap compound semiconductor with applications in high temperature, high power, high frequency electronic devices, solid state sensors, optoelectronics ...
  • Neutron Transmutation Doping and Radiation Hardness for Solution-Grown Bulk and Nano-Structured ZnO 
    FLITSIYAN, E.; SWARTZ, C.; PEALE, R. E.; LUPAN, O.; CHERNYAK, L.; CHOW, L.; VERNETSON, W. G.; DASHEVSKY, Z. (Cambridge University Press, 2011)
    It is shown that solution-grown ZnO nanostructures exhibit enhanced radiation hardness against neutron irradiation as compared to bulk material. The decrease of the cathodoluminescence intensity after irradiation at a ...
  • Processing-Induced Modification of Photo- and Cathodoluminescence Spectra of TiO2 Nanotubes 
    ENACHI, M.; STEVENS-KALCEFF, M.; BURLACU, A.; TIGINYANU, I.; URSAKI, V. (The Electrochemical Society, 2012)
    Cathodoluminescence and photoluminecsence are investigated in titanium dioxide nanotubes (TiO2 NTs) produced in an ethylene glycol based electrolyte with the variation of the temperature of the electrolyte which allows the ...
  • TiO2 nanotubular structures for optoelectronic and photonic applications 
    ENACHI, Mihai; CIOBANU, Vladimir; SERGENTU, Vladimir; URSAKI, Veaceslav (Romanian Academy, 2015)
    We prove analytically that metallized TiO2 nanotubular structures are characterized by negative refractive index which opens the possibility for their use as cost-effective focusing elements. Flat and concave lenses assembled ...
  • Ultra-thin semiconductor membrane nanotechnology based on surface charge lithography 
    TIGINYANU, Ion; POPA, Veaceslav; STEVENS-KALCEFF, Marion A. (Society of Photo-Optical Instrumentation Engineers, SPIE, 2011)
    We show that by subjecting GaN epilayers on sapphire substrates to low-energy/low-dose ion treatment with subsequent photoelectrochemical etching it is possible to fabricate ultra-thin GaN membranes in the form of nano-roof ...
  • Yellow Luminescence and Optical Quenching of Photoconductivity in Ultrathin Suspended GaN Membranes Produced by Surface Charge Lithography 
    POPA, V.; BRANISTE, T.; STEVENS-KALCEFF, M. A.; GERTHSEN, D.; BRENNER, P.; POSTOLACHE, V.; URSAKI, V.; TIGINYANU, I. M. (American Scientific Publishers, 2013)
    Spatial and spectral distribution of cathodoluminescence as well as photoelectrical properties under excitation with two beams of monochromatic radiation of various wavelengths are investigated in ultrathin suspended GaN ...

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