IRTUM – Institutional Repository of the Technical University of Moldova

Browsing Colecția instituțională by Author "TIGINYANU, Ion M."

Browsing Colecția instituțională by Author "TIGINYANU, Ion M."

Sort by: Order: Results:

  • AUltrathin tin sulfide field-effect transistors with subthreshold slope below 60 mV/decadeero-TiO2 prepared on the basis of networks of ZnO tetrapods 
    CIOBANU, Vladimir; URSAKI, Veaceslav V.; LEHMANN, Sebastian; BRANISTE, Tudor; RAEVSCHI, Simion; ZALAMAI, Victor V.; MONAICO, Eduard V.; COLPO, Pascal; NIELSCH, Kornelius; TIGINYANU, Ion M. (Multidisciplinary Digital Publishing Institute (MDPI), 2022)
    In this paper, new aeromaterials are proposed on the basis of titania thin films deposited using atomic layer deposition (ALD) on a sacrificial network of ZnO microtetrapods. The technology consists of two technological ...
  • Band tail state related photoluminescence and photoresponse of ZnMgO solid solution nanostructured films 
    MORARI, Vadim; PANTAZI, Aida; CURMEI, Nicolai; POSTOLACHE, Vitalie; RUSU, Emil V.; ENACHESCU, Marius; TIGINYANU, Ion M.; URSAKI, Veaceslav V. (Beilstein Institute for the Advancement of Chemical Sciences, Germany, 2020)
    A series of Zn1−xMgxO thin films with the composition range x = 0.00–0.40 has been prepared by sol–gel spin coating on Si substrates with a post-deposition thermal treatment in the temperature range of 400–650 °C. The ...
  • Controlled Electroplating of Noble Metals on III-V Semiconductor Nanotemplates Fabricated by Anodic Etching of Bulk Substrates 
    MONAICO, Elena I.; MONAICO, Eduard V.; URSAKI, Veaceslav V.; TIGINYANU, Ion M. (MDPI (Basel, Switzerland), 2022)
    Porous templates are widely used for the preparation of various metallic nanostructures. Semiconductor templates have the advantage of controlled electrical conductivity. Site-selective deposition of noble metal formations, ...
  • Controlled engineering of gold nanodots deposition using hopping electrodeposition 
    MONAICO, Eduard V.; TIGINYANU, Ion M.; NIELSCH, K. (Technical University of Moldova, 2024)
    In this work, the applications of the previously elaborated „hopping electrodeposition” approach for the deposition of gold nanodots on semiconductor surfaces is addressed.
  • Core–Shell GaAs-Fe nanowire arrays: fabrication using electrochemical etching and deposition and study of their magnetic properties 
    MONAICO, Eduard V.; MORARI, Vadim; URSAKI, Veaceslav V.; NIELSCH, Kornelius; TIGINYANU, Ion M. (Multidisciplinary Digital Publishing Institute (MDPI), 2022)
    The preparation of GaAs nanowire templates with the cost-effective electrochemical etching of (001) and (111)B GaAs substrates in a 1M HNO3 electrolyte is reported. The electrochemical etching resulted in the obtaining of ...
  • Core–Shell structures prepared by atomic layer deposition on GaAs nanowires 
    URSAKI, Veaceslav V.; LEHMANN, Sebastian; ZALAMAI, Victor V.; MORARI, Vadim; NIELSCH, Kornelius; TIGINYANU, Ion M.; MONAICO, Eduard V. (Multidisciplinary Digital Publishing Institute (MDPI), 2022)
    GaAs nanowire arrays have been prepared by anodization of GaAs substrates. The nanowires produced on (111)B GaAs substrates were found to be oriented predominantly perpendicular to the substrate surface. The prepared ...
  • Efficient Focusing with an Ultra-Low Effective-Index Lens Based on Photonic Crystals 
    FOCA, Eugen; FÖLL, Helmut; DASCHNER, Frank; SERGENTU, Vladimir V.; CARSTENSEN, Jürgen; KNÖCHEL, Reinhard; TIGINYANU, Ion M. (Cambridge University Press, 2005)
    This work focuses on photonic crystals (PC) that can be ascribed an effective index of refraction > 1 or even > 0. We investigate the possibility to design optical elements (in this case a lens) based on this type of PC. ...
  • Electrochemical deposition of ferromagnetic ni nanoparticles in InP nanotemplates fabricated by anodic etching using environmentally friendly electrolyte 
    MOISE, Calin Constantin; MIHAI, Geanina Valentina; ANICAI, Liana; MONAICO, Eduard V.; URSAKI, Veaceslav V.; ENACHESCU, Marius; TIGINYANU, Ion M. (Publisher: Multidisciplinary Digital Publishing Institute (MDPI), 2022)
    Porous InP templates possessing a thickness of up to 100 µm and uniformly distributed porosity were prepared by anodic etching of InP substrates exhibiting different electrical conductivities, involving an environmentally ...
  • Electrochemical nanostructuring of (111) oriented GaAs crystals: from porous structures to nanowires 
    MONAICO, Elena I.; MONAICO, Eduard V.; URSAKI, Veaceslav V.; HONNALI, Shashank; POSTOLACHE, Vitalie; LEISTNER, Karin; NIELSCH, Kornelius; TIGINYANU, Ion M. (Beilstein Institute for the Advancement of Chemical Sciences, Germany, 2020)
    A comparative study of the anodization processes occurring at the GaAs(111)A and GaAs(111)B surfaces exposed to electrochemical etching in neutral NaCl and acidic HNO3 aqueous electrolytes is performed in galvanostatic and ...
  • Fabrication of photonic crystal circuits based on GaN ultrathin membranes by maskless lithography 
    VOLCIUC, Olesea; BRANISTE, Tudor; SERGENTU, Vladimir; URSAKI, Veaceslav; TIGINYANU, Ion M.; GUTOWSKI, Jürgen (Society of Photo-Optical Instrumentation Engineers, SPIE, 2015)
    We report on maskless fabrication of photonic crystal (PhC) circuits based on ultrathin (d~15 nm) nanoperforated GaN membranes exhibiting a triangular lattice arrangement of holes with diameters of 150 nm. Ultrathin GaN ...
  • Flame based growth of ZnO nano- and microstructures for advanced optical, multifunctional devices, and biomedical applications (Conference Presentation) 
    MISHRA, Yogendra K.; GRÖTTRUP, Jorit; SMAZNA, Daria; HÖLKEN, Iris; HOPPE, Mathias; SINDUSHREE, Sindushree; KAPS, Sören; LUPAN, Oleg; SEIDEL, Jan; MONTEIRO, Teresa; TIGINYANU, Ion M.; KIENLE, Lorenz; RONNING, Carsten; SCHULTE, Karl; FIEDLER, Bodo; ADELUNG, Rainer (SPIE, Society of Photo-Optical Instrumentation Engineers, 2017)
    The ZnO micro- and nanoneedles grown at walls in silicon trenches showed excellent whispering gallery mode resonances and photocatalytic properties. Using the same strategy, large polycrystalline micro- and nanostructured ...
  • Free-Standing Large-Area Nanoperforated Gold Membranes Fabricated by Hopping Electrodeposition 
    MONAICO, Eduard V.; MONAICO, Elena I.; URSAKI, Veaceslav V.; TIGINYANU, Ion M. (The Electrochemical Society, 2020)
    A room-temperature two-step cost-effective electrochemical technology is proposed for the preparation of free-standing Au nanomembranes. A thin Au film with the thickness less than 100 nm was deposited by pulsed electroplating ...
  • Gold coated microstructures as a platform for the preparation of semiconductor-based hybrid 3D micro-nano-architectures 
    MONAICO, Eduard V.; URSAKI, Veaceslav V.; TIGINYANU, Ion M. (Springer Nature Switzerland, 2023)
    In this paper, three types of microstructures are argued as substrates for electrochemical deposition of Au nanodots. They include: (a) aero-GaN consisting of hollow GaN microtetrapods, (b) microdomains of pores with a ...
  • Gold decorated galium oxide nanowires for multifunctional applications 
    MONAICO, Elena I.; MONAICO, Eduard V.; URSAKI, Veaceslav V.; TIGINYANU, Ion M. (Technical University of Moldova, 2024)
    A three-step fabrication process to produce hybrid nanostructures consisting of Ga2O3 nanowires decorated with gold nanodots on GaAs substrates is reported. The process involves electrochemical etching of GaAs substrates, ...
  • Impact of substrate upon morphology, luminescence, and wettability of ZnMgO layers deposited by spray pyrolysis 
    MONAICO, Eduard V.; MORARI, Vadim; BUIUCLI, Stepan; ZALAMAI, Victor V.; URSAKI, Veaceslav V.; TIGINYANU, Ion M. (Multidisciplinary Digital Publishing Institute (MDPI), 2024)
    In this work, we report on a comparative study of the topology, luminescence, and wettability properties of ZnMgO films prepared by a cost-effective spray pyrolysis technology on GaAs substrates with (100), (001), and (111) ...
  • Joint experimental and theoretical study of PbGa2S4 under compression 
    GARCIA-SANCHEZ, Tania; GALLEGO-PARRA, Samuel; LIANG, Akun; RODRIGO-RAMON, Jose´ Luis; MUÑOZ, Alfonso; RODRIGUEZ-HERNANDEZ, Plácida; GONZALEZ-PLATAS, Javier; SANS, Juán Ángel; CUENCA-GOTOR, Vanesa Paula; OSMAN, Hussien H.; POPESCU, Catalin; URSAKI, Veaceslav; TIGINYANU, Ion M.; ERRANDONEA, Daniel; MANJÓN, Francisco Javier (Royal Society of Chemistry, 2023)
    The effect of pressure on the structural, vibrational, and optical properties of lead thiogallate, PbGa2S4, crystallizing under room conditions in the orthorhombic EuGa2S4-type structure (space group Fddd), is investigated. ...
  • Magnetic properties of GaAs/NiFe coaxial Core-Shell structures 
    MONAICO, Eduard V.; MORARI, Vadim; KUTUZAU, Maksim; URSAKI, Veaceslav V.; NIELSCH, Kornelius; TIGINYANU, Ion M. (Multidisciplinary Digital Publishing Institute (MDPI), 2022)
    Uniform nanogranular NiFe layers with Ni contents of 65%, 80%, and 100% have been electroplated in the potentiostatic deposition mode on both planar substrates and arrays of nanowires prepared by the anodization of GaAs ...
  • Multilayer porous structures on GaN for the fabrication of Bragg reflectors 
    BRANISTE, Tudor; MONAICO, Eduard; MARTIN, Denis; CARLIN, Jean-François; POPA, Veaceslav; URSAKI, Veaceslav V.; GRANDJEAN, Nicolas; TIGINYANU, Ion M. (Society of Photo-Optical Instrumentation Engineers, SPIE, 2017)
    We report on the development of electrochemical etching technology for the production of multilayer porous structures (MPS) allowing one to fabricate Bragg reflectors on the basis of GaN bulk substrates grown by Hydride ...
  • Multilayer porous structures on GaN for the fabrication of Bragg reflectors 
    BRANISTE, Tudor; MONAICO, Eduard; MARTIN, Denis; CARLIN, Jean-François; POPA, Veaceslav; URSAKI, Veaceslav V.; GRANDJEAN, Nicolas; TIGINYANU, Ion M. (SPIE, 2017)
    We report on the development of electrochemical etching technology for the production of multilayer porous structures (MPS) allowing one to fabricate Bragg reflectors on the basis of GaN bulk substrates grown by Hydride ...
  • Photoluminescence of Eu-doped ZnO structures 
    URSAKI, Veaceslav V.; RUSU, Emil; ZALAMAI, Victor; SIRBU, Lilian; MONAICO, Eduard; TIGINYANU, Ion M. (Society of Photo-Optical Instrumentation Engineers, SPIE, 2004)
    ZnO-based red phosphors were prepared by different methods. One phosphor was grown from a Na2B4O7 melt, and another one was prepared from a ZnO:Eu2O3 powder via electron beam treatment. The e-beam processing is found to ...

Search DSpace


Browse

My Account