Articole ştiinţifice: Recent submissions

  • Time resolved blue and ultraviolet photoluminescence in porous GaP 
    ANEDDA, A.; SERPI, A.; KARAVANSKII, V. A.; TIGINYANU, I. M.; ICHIZLI, V. M. (American Institute of Physics, 1995)
    Porous GaP layers prepared by electrochemical anodization of (100)-oriented bulk material was found to exhibit blue and ultraviolet photoluminescence when excited by a KrF excimer laser. The energy position of the UV ...
  • Self-Induced Voltage Oscillations during Anodic Etching of n-InP and Possible Applications for Three-Dimensional Microstructures 
    LANGA, S.; CARSTENSEN, J.; TIGINYANU, I. M.; CHRISTOPHERSEN, M.; FÖLL, H. (The Electrochemical Society, 2001)
    Voltage oscillations were observed during anodic etching of (100)-oriented n-InP substrates in an aqueous solution of HCl at high constant current density. Under certain conditions, the oscillations lead to a synchronous ...
  • Formation of Porous Layers with Different Morphologies during Anodic Etching of n-InP 
    LANGA, S.; TIGINYANU, I. M.; CARSTENSEN, J.; CHRISTOPHERSEN, M.; FÖLL, H. (The Electrochemical Society, 1999)
    Two different morphologies of porous layers were observed in (100)-oriented anodically etched in an aqueous solution of . At high current density anodization leads to the formation of so-called current-line oriented ...
  • Pores in III–V semiconductors 
    FÖLL, H.; LANGA, S.; CARSTENSEN, J.; CHRISTOPHERSEN, M.; TIGINYANU, I. M. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2003)
    The paper reviews electrochemically etched pores in III–V compound semiconductors (GaP, InP, GaAs) with emphasis on nucleation and formation mechanisms, pore geometries and morphologies, and to several instances of ...
  • Selective Multiterminal Sensor on Individual ZnO Nanotetrapod 
    LUPAN, O.; CHAI, G.; CHOW, L.; TROFIM, V. (NSTI, 2009)
    This article presents a sensitive and selective sensor based on an individual zinc oxide nanotetrapod and on crossed ZnO nanorod for detection of UV light and hydrogen at low temperature. It is demonstrated that ZnO tetrapod ...
  • Synthesis and Characterization of Functional Nanostructured Metal Oxide Thin Films 
    CHOW, Lee; SHISHIYANU, S.; LUPAN, Oleg; SHISHIYANU, Teodor (ECS - The Electrochemical Society, 2006)
    The nanomaterials are obtained to analyze the physical and structural requirements of their applications in gas sensors and solar cells. This claim is sustained by a model of the nucleation and growth processes through the ...
  • Investigation of tin oxide nanobelts/nanoribbons prepared by chemical deposition technology 
    LUPAN, O.; CHOW, L.; CHAI, G.; SCHULTE, A.; PARK, S.; HEINRICH, H.; SONTEA, V.; TROFIM, V.; RAILEAN, S. (Institute of Electrical and Electronics Engineerings, IEEE, 2008)
    A facile aqueous solution process to fabricate tin oxide nanoarchitectures was successfully developed. The influence of precursors on the morphology of SnO2 is studied. Tin oxide nanobelts/nanoribbons were characterized ...
  • ZnO-based Nanowires for hybrid low-voltage LED 
    LUPAN, Oleg; PAUPORT, Thierry; VIANA, Bruno (Optical Society of America, 2011)
    Nanowires (NW) based light emitting diodes (LEDs) have drawn large interest due to many advantages compared to thin film devices. Marked improved performances are expected from nanostructured active layers for light emission. ...
  • ZnO Nanowire emitters for tunable near-UV-Blue Light emitting diodes 
    VIANA, B.; LUPAN, O.; PAUPORTÉ, T. (Vinča Institute of Nuclear Sciences Belgrade, Serbia, 2011)
    We have shown that the emission wavelength could be tuned and shift toward the violet-blue region by up to 40 nm by doping with Cu or Cd . Our results clearly state the remarkable quality of the pure and doped-ZnO ...
  • Rapid photothermal processing for functionalization of nanostructured thin films 
    SHISHIYANU, S.; URSAKI, V. V.; GHIMPU, L.; LUPAN, O.; TIGINYANU, I.; SHISHIYANU, T. (Institute of Electrical and Electronics Engineerings, IEEE, 2011)
    A rapid photothermal processing (RPP) technique has been developed to functionalize a new generation of nanostructured zinc oxide film materials. An environment-friendly chemical process was used to obtain nanostructures. ...
  • ZnO nanowires for tunable near-UV/blue LED 
    PAUPORTÉ, Thierry; LUPAN, Oleg; VIANA, Bruno (Society of Photo-Optical Instrumentation Engineers (SPIE), 2012)
    Nanowires (NWs)-based light emitting diodes (LEDs) have drawn large interest due to many advantages compared to thin film based devices. Markedly improved performances are expected from nanostructured active layers for ...
  • ZnO nanowire-based light-emitting diodes with tunable emission from near-UV to blue 
    PAUPORTÉ, Thierry; LUPAN, Oleg; VIANA, Bruno; LE BAHERS, T. (Society of Photo-Optical Instrumentation Engineers (SPIE), 2013)
    Nanowires (NWs)-based light emitting diodes (LEDs) have drawn large interest due to many advantages compared to thin film based devices. We have successfully prepared epitaxial n-ZnO(NW)/p-GaN heterojunctions using low ...
  • Rapid synthesis and characterization of micro and nanostructures of molybdenum trioxide 
    TROFIM, V.; CRETU, V.; LUPAN, O.; ENACHI, M.; MONAICO, E.; SYRBU, N.; TIGINYANU, I.; CHOW, L. (Institute of Electrical and Electronics Engineerings, IEEE, 2013)
    Micro - and nanostructures of molybdenum trioxide (MoO3) have been investigated intensively for sensorial and electrochromic systems. MoO3 nanostructures were grown by a rapid thermal oxidation of molybdenum at 1000 °C in ...
  • UV photodetector based on Ag-doped ZnO nanostructured films 
    POSTICA, Vasilie; CREŢU, Vasilii; TROFIM, Viorel; RAILEAN, Sergey; SONTEA, Victor; LUPAN, Oleg (Institutul de Fizică Aplicată al AŞM, 2014)
    In this work, we present an UV detector based on nanostructured films of Ag-doped ZnO deposited using successive chemical synthesis SCS method. By varying duration and temperature of thermal annealing in furnace (TA) and ...
  • 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 ...
  • Properties of ZnO:Fe nanostructured films grown by successive chemical synthesis 
    POSTICA, V.; HOPPE, M.; ABABII, N.; TROFIM, V.; RAILEAN, S.; ADELUNG, R.; LUPAN, O. (Institute of Electrical and Electronics Engineerings, IEEE, 2016)
    Rapid progress of nanotechnology in recent years and continuous minimization of portable devices created the necessity of multifunctional devices elaboration. In this work, the morphological, structural and sensing properties ...
  • Single Nanowire-based Nanosensors 
    LUPAN, Oleg; ADELUNG, Rainer; PAUPORTE, Thierry; KIENLE, Lorenz; TIGINYANU, Ion; CHOW, Lee (Institutul de Fizică Aplicată al AŞM, 2017)
    Noble metals, such as Pd, Ag, Pt, Au and Ru, are known to be very effective catalysts and help in the improvement of the metal oxides sensing properties. A series of methods have been proposed to incorporate these metals ...
  • 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 ...
  • Individual Bi2O3-Functionalized ZnO Microwire for Hydrogen Gas Detection 
    POSTICA, V.; LUPAN, O.; GRÖTTRUP, J.; ADELUNG, R. (Springer Nature Switzerland, 2018)
    Individual micro- and nanostructures of metal oxides are known to be highly sensitive to surface phenomena due to their enhanced surface-to-volume ratio. In this work, an individual Bi2O3-functionalized ZnO microwire ...
  • Nanosensors on a single semiconducting oxide nanowire 
    LUPAN, Oleg; POSTICA, Vasile; ADELUNG, Rainer (Academia de Ştiinţe a Moldovei, 2019)
    The room-temperature nanosensors are demanded from different fields, such as rapid detection of hazardous, explosive and nocive gases, compounds and various risky nanomaterials. Due to their huge surface-to-volume ratio ...

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