Browsing Articole ştiinţifice by Author "SARUA, A."

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  • Application of surface charge lithography to nanostructuring of GaN epilayers 
    POPA, V. Iu.; VOLCIUC, O.; TIGINYANU, I. M.; SARUA, A.; HEARD, P. (Springer Nature Switzerland, 2008)
    It is shown that treatment of GaN epilayers by a low energy low dose focused ion beam with subsequent photoelectrochemical etching represent an efficient tool for GaN nanostructuring. Direct “writing” of a surface negative ...
  • Charge carrier distribution in free-standing porous GaP membranes studied by Raman spectroscopy 
    SARUA, A.; TIGINYANU, I. M.; URSAKI, V. V.; IRMER, G.; MONECKE, J.; HARTNAGEL, H. L. (ELSEVIER, 1999)
    Free-standing porous GaP membranes were fabricated by anodic etching of (111)-oriented crystalline substrates in H2SO4 aqueous solution. The formation of a column-shaped porous structure with average structure dimension ...
  • Fröhlich modes in gan columnar nanostructures 
    TIGINYANU, I. M.; SARUA, A.; IRMER, G.; MONECKE, J.; HUBBARD, S. M.; PAVLIDIS, D.; VALIAEV, V. (American Physical Society, 2001)
    GaN columnar nanostructures fabricated by electrochemical dissolution of bulk material have been studied by micro-Raman spectroscopy. The anodization induces an increase in the intensity of Raman scattering accompanied by ...
  • Fröhlich modes in porous III-V semiconductors 
    SARUA, A.; MONECKE, J.; IRMER, G.; TIGINYANU, I. M.; GÄRTNER, G.; HARTNAGEL, H. L. (IOP Publishing, 2001)
    Porous GaP, InP and GaAs structures fabricated by MeV ion-implantation-assisted electrochemical etching were investigated by Raman and Fourier transform infrared spectroscopy. Fröhlich modes in the frequency gap between ...
  • Optical characterization of hierarchical ZnO structures grown with a simplified vapour transport method 
    URSAKI, V. V.; RUSU, E. V.; SARUA, A.; KUBALL, M.; STRATAN, G. I.; BURLACU, A.; TIGINYANU, I. M. (IOP Publishing, 2007)
    A new ZnO micro/nanostructure morphology in the form of micro-torches was grown in the family of ZnO hierarchical structures by a simplified thermal chemical vapour transport and condensation method using a vertical furnace. ...
  • Photoluminescence and vibrational properties of nanostructured ZnSe templates 
    MONAICO, E.; TIGINYANU, I. M.; URSAKI, V. V.; SARUA, A.; KUBALL, M.; NEDEOGLO, D. D.; SIRKELI, V. P. (IOP Publishing, 2007)
    Electrochemical etching of pores in as-grown and doped n-type ZnSe substrates is reported. To dope the samples the as-grown semi-insulating substrates were annealed in a Zn melt containing Al impurity at concentrations ...
  • Poly(p-phenylene vinylene)/porous GaP composite materials 
    LE RENDU, P.; NGUYEN, T. P.; LAKEHAL, M.; IP, J.; TIGINYANU, I. M.; SARUA, A.; IRMER, G. (ELSEVIER, 2001)
    We report results obtained from physical characterization of thin composite films made by mixing poly(p-phenylene vinylene) (PPV) and porous gallium phosphide (GaP) particles with different GaP concentrations. Optical ...
  • Raman and IR-Reflectance Spectra of Porous III–V Semiconductor Structures 
    SARUA, A.; GÄRTNER, G.; IRMER, G.; MONECKE, J.; TIGINYANU, I. M.; HARTNAGEL, H. L. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2000)
    Porous layers on the basis of LEC-grown n-type crystals of (111)-GaP and (100)-InP were fabricated by electrochemical etching in aqueous acidic solutions. The prepared samples were studied by micro-Raman analysis and by ...
  • Raman spectroscopy of porous and bulk GaP subjected to MeV-ion implantation and annealing 
    SARUA, A.; IRMER, G.; MONECKE, J.; TIGINYANU, I. M.; SCHWAB, C.; GROB, J.-J.; HARTNAGEL, H. L. (American Institute of Physics, 2000)
    Porous layers on (100)-oriented n-type liquid encapsulated Czochralski grown GaP crystals were fabricated by electrochemical etching in a H2SO4 aqueous solution and analyzed by scanning electron microscopy. 12C+ ions were ...

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