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Browsing Articole din publicaţii internaţionale by Author "TIGINYANU, Ion"

Browsing Articole din publicaţii internaţionale by Author "TIGINYANU, Ion"

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  • Nanostructured Film of Indium Phosphide as Biosensor in 1D Array Electrowetting System 
    SIRBU, Lilian; VODĂ, Irina; ESINENCO, Dorin; GANGAN, Sergiu; MULLER, Raluca; VOICU, Rodica Cristina; DǍNILǍ, Mihai; GHIMPU, Lidia; TIGINYANU, Ion; URSAKI, Veacheslav (Romanian Academy Publishing House, 2011)
    We demonstrated the fabrication of complex nanostructured InP membranes with porous compact packed structure that have been cut during electrochemical etching in the same anodic process. The membranes were filled with ...
  • Nanowire networks: three-dimensional SnO2 nanowire networks for multifunctional applications: from high-temperature stretchable ceramics to ultraresponsive sensors 
    PAULOWICZ, Ingo; HRKAC, Viktor; KAPS, Sören; CRETU, Vasilii; LUPAN, Oleg; BRANISTE, Tudor; DUPPEL, Viola; TIGINYANU, Ion; KIENLE, Lorenz; ADELUNG, Rainer; MISHRA, Yogendra Kumar (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2015)
    Stretchable three-dimensional ceramic networks constructed from quasi-one-dimensional metal oxide nanostructures are versatile candidates for using nanoscopic structures in everyday technologies. The growth of such networks ...
  • Nearfield effect in a nanotube/nanopor array system for application in EWOD devices that are operating in THz region 
    SIRBU, Lilian; SERGENTU, Vladimir; VOICU, Rodica; TIGINYANU, Ion; URSAKI, Veaceslav (IEEE, 2012)
    We present a theoretical model for propagation of EM wav. in various kinds of structures such as arrays of monolayer cylinders, multilayer cylinders, non-metallized and metallised pores. An analytical method was developed ...
  • Obtaining of II-VI compound substrates with controlled electrical parameters and prospects of their application for nanoporous structures 
    COLIBABA, Gleb; GONCEARENCO, Evghenii; NEDEOGLO, Dmitrii; NEDEOGLO, Natalia; MONAICO, Eduard; TIGINYANU, Ion (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2014)
    Substrates of II-VI semiconductor compounds may be widely used in fabrication of nanoporous matrices (NM), which give the possibility to obtain nanowires and nanotubes of various materials with good application prospects ...
  • Optoelectronic properties of gallium nitride thin membranes 
    BRANISTE, Tudor; POPA, Veaceslav; VOLCIUC, Olesea; TIGINYANU, Ion (Romanian Academy, 2015)
    We present the results of a systematic study of persistent photoconductivity (PPC) generated by UV-excitation in thin membranes based on crystalline GaN. The PPC was found to be optically quenched under extrinsic excitation ...
  • Ordered arrays of metal nanotubes in semiconductor envelope 
    TIGINYANU, Ion; MONAICO, Elena; MONAICO, Eduard (ELSEVIER, 2008)
    We report on fabrication of metal nanotubes in semiconductor nanotemplates possessing ordered two-dimensional hexagonal arrays of pores grown in n-InP crystalline substrates using anodic etching in neutral electrolyte. ...
  • Perovskite solar cells with ZnS as electron transport layer 
    POPA, Mihail; ZAKHIDOV, Anvar; TIGINYANU, Ion (Romanian Academy Publishing House, 2018)
    This work demonstrates the application of ZnS thin layers and the doped layers with ZnS in the perovskite solar cells. Electron transport layer has been used in three different forms. For solar cells with a single layer ...
  • Photocatalytic Properties of TiO2 Nanotubes Doped with Ag, Au and Pt or Covered by Ag, Au and Pt Nanodots 
    ENACHI, Mihail; GUIX, Maria; BRANIŞTE, Tudor; POSTOLACHE, Vitalie; CIOBANU, Vladimir; URSAKI, Veacheslav; SCHMIDT, Oliver G.; TIGINYANU, Ion (Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Republic of Moldova, 2015)
    Titania nanotube arrays have been prepared by anodic oxidation of titanium foils in an electrolyte solution containing a mixture of hydrofluoric acid, ethylene glycol, and phosphoric acid. The initially amorphous nanotubes ...
  • Photocatalytic properties of TiO2 nanotubes doped with Ag, Au and Pt or covered by Ag, Au and Pt nanodots 
    ENACHI, Mihail; GUIX, Maria; BRANISTE, Tudor; POSTOLACHE, Vitalie; CIOBANU, Vladimir; URSAKI, Veaceslav; SCHMIDT, Oliver G.; TIGINYANU, Ion (Springer Nature Switzerland, 2015)
    Titania nanotube arrays have been prepared by anodic oxidation of titanium foils in an electrolyte solution containing a mixture of hydrofluoric acid, ethylene glycol, and phosphoric acid. The initially amorphous nanotubes ...
  • Photoinduced modification of surface states in nanoporous InP observed by terahertz spectroscopy 
    LLOYD-HUGHES, James; MUELLER, Susanne; SCALARI, Giacomo; BISHOP, Hugh; CROSSLEY, Alison; ENACHI, Mihai; SIRBU, Lilian; TIGINYANU, Ion (American Physical Society, 2012)
    A precise control of the surface properties of semiconductor nanomaterials is vital for their functionality and use in many opto-electronic applications. Terahertz time-domain spectroscopy allows the non-contact investigation ...
  • Photonic Crystal Structures Based on GaN Ultrathin Membranes 
    VOLCIUC, Olesea; SERGENTU, Vladimir; TIGINYANU, Ion; SCHOWALTER, Marco; URSAKI, Veaceslav; ROSENAUER, Andreas; HOMMEL, Detlef; GUTOWSKI, Jürgen (American Scientific Publishers, 2014)
    We report on maskless fabrication of ultrathin (d ~ 15 nm) nanoperforated GaN membranes exhibiting a triangular lattice arrangement of holes with a diameter of 150 nm, and show that these membranes represent an intermediate ...
  • Porous InP as Piezoelectric Component in Magneto-Electric Composite Sensors 
    GERNGROSS, Mark-Daniel; SPRINCEAN, Veaceslav; LEISNER, Malte; CARSTENSEN, Jürgen; FÖLL, Helmut; TIGINYANU, Ion (The Electrochemical Society, 2011)
    We report on the fabrication of cheap piezoelectric porous InP templates by electrochemical etching and additional purely chemical post-etching and on the galvanic filling of the resulting nanopore array with Ni-Fe using ...
  • Porous semiconductor compounds 
    MONAICO, Eduard; TIGINYANU, Ion; URSAKI, Veaceslav (IOP Publishing, 2020)
    In this review paper, we present a comparative analysis of the electrochemical dissolution of III–V (InP, GaAs, GaN), II–VI (ZnSe, CdSe) and SiC semiconductor compounds. The resulting morphologies are discussed, including ...
  • Properties of a single SnO2:Zn2SnO4 – Functionalized nanowire based nanosensor 
    LUPAN, Oleg; WOLFF, Niklas; POSTICA, Vasile; BRANISTE, Tudor; PAULOWICZ, Ingo; HRKAC, Viktor; MISHRA, Yogendra Kumar; TIGINYANU, Ion; KIENLE, Lorenz; ADELUNG, Rainer (ELSEVIER, 2018)
    Tin oxide nanowires (SnO2 NWs) exhibit large potential for applications in sensor and detector technology. Using a flame transport synthesis method, high-quality single crystalline SnO2 nanowires (NWs) with Zn2SnO4 dots ...
  • Raman scattering by porous structures with InAs quantum dots 
    MILEKHIN, Alexander; URSAKI, Veacheslav; SIRBU, Lilian; TOROPOV, Alexander; TIGINYANU, Ion; ZAHN, Dietrich R. T. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2009)
    In this paper we search for the possibilities of introducing porosity in InAs/AlAs/GaAs multilayer quantum dot structures as an additional tool for the modification of their phonon spectrum. Raman spectroscopy is used as ...
  • Rapid switching and ultra-responsive nanosensors based on individual shell–core Ga2O3/GaN:Ox@SnO2 nanobelt with nanocrystalline shell in mixed phases 
    LUPAN, Oleg; BRANISTE, Tudor; DENG, Mao; GHIMPU, Lidia; PAULOWICZ, Ingo; MISHRA, Yogendra K.; KIENLE, Lorenz; ADELUNG, Rainer; TIGINYANU, Ion (ELSEVIER, 2015)
    The detailed TEM structural studies on the as-grown and annealed structures confirmed that the nanocable is made from mixed phases by an excellent agreement with the standard data for rutile SnO2, amorphous GaN:Ox and ...
  • Self-induced oscillation of the macropore diameter in n-type silicon 
    COJOCARU, Ala; CARSTENSEN, Jürgen; LEISNER, Malte; FÖLL, Helmut; TIGINYANU, Ion (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2009)
    Electrochemical etching of n-type silicon in viscous-electrolyte containing HF for macropore formation has been employed to obtain deep pores at high growth rates. Under certain conditions, a new kind of macropore growth ...
  • Self-organized and self-propelled aero-GaN with dual hydrophilic-hydrophobic behaviour 
    TIGINYANU, Ion; BRANISTE, Tudor; SMAZNA, Daria; DENG, Mao; SCHÜTT, Fabian; SCHUCHARDT, Arnim; STEVENS-KALCEFF, Marion A.; RAEVSCHI, Simion; SCHÜRMANN, Ulrich; KIENLE, Lorenz; PUGNO, Nicola M.; MISHRA, Yogendra Kumar; ADELUNG, Rainer (ELSEVIER, 2019)
    Nature utilizes hydrophilic-hydrophobic biomolecular entities to perform self-organized structural and functional tasks, including the formation of cellular compartments and motion, separation of chemicals or self-healing ...
  • Self-organized nucleation layer for the formation of ordered arrays of double-walled TiO2 nanotubes with temperature controlled inner diameter 
    ENACHI, Mihai; TIGINYANU, Ion; SPRINCEAN, Veaceslav; URSAKI, Veaceslav (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2010)
    Abstract It is proposed to use the variation of the electrolyte temperature to fabricate titania nanotubes with variable inner diameter at a constant outer diameter and an invariable package density. The anodization of Ti ...
  • Self-Organized Three-Dimensional Nanostructured Architectures in Bulk GaN Generated by Spatial Modulation of Doping 
    TIGINYANU, Ion; STEVENS-KALCEFF, Marion A.; SARUA, Andrei; BRANISTE, Tudor; MONAICO, Eduard; POPA, Veaceslav; ANDRADE, Hugo D.; THOMAS, James O.; RAEVSCHI, Simion; SCHULTE, Karl; ADELUNG, Rainer (The Electrochemical Society, 2016)
    Self-organized 3D nanostructured architectures including quasi-ordered concentric hexagonal structures generated during the growth of single crystalline n-GaN substrates by hydride vapor phase epitaxy (HVPE) are reported. ...

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