Articole ştiinţifice: Recent submissions

  • Samarium-Doped Ceria Nanostructured Thin Films Grown on FTO Glass by Electrodepostion 
    ŽIVKOVIC, Lj.; LAIR, V.; LUPAN, O.; CASSIR, M.; RINGUEDE, A. (Polish Academy of Science, 2019)
    Electrical, optical or catalytic properties of ceria can be tuned via doping by rare earth elements. The innate properties of ceria-based materials can be further amplified by using nanostructured ceria. In this study, ...
  • Synthesis and Characterization of Functional Nanostructured Zinc Oxide Thin Films 
    CHOW, Lee; SHISHIYANU, S.; LUPAN, Oleg; SHISHIYANU, Teodor (The Electrochemical Society, 2019)
    A novel aqueous relatively low-temperature thin film growth technique has been developed to fabricate a new generation of smart and functional nanostructured metal oxide thin film materials. This chemical synthetic route ...
  • Nanomechanics of individual aerographite tetrapods 
    MEIJA, Raimonds; SIGNETTI, Stefano; SCHUCHARDT, Arnim; MEURISCH, Kerstin; SMAZNA, Daria; MECKLENBURG, Matthias; SCHULTE, Karl; ERTS, Donats; LUPAN, Oleg; FIEDLER, Bodo; MISHRA, Yogendra Kumar; ADELUNG, Rainer; PUGNO, Nicola M. (Springer Nature Limited, 2017)
    Carbon-based three-dimensional aerographite networks, built from interconnected hollow tubular tetrapods of multilayer graphene, are ultra-lightweight materials recently discovered and ideal for advanced multifunctional ...
  • UV detection properties of hybrid ZnO tetrapod 3-D networks 
    GRÖTTRUP, J.; POSTICA, V.; SMAZNA, D.; HOPPE, M.; KAIDAS, V.; MISHRA, Y. K.; LUPAN, O.; ADELUNG, R. (ELSEVIER, 2017)
    Hybridization of micro- and nanostructures of semiconducting oxides is known to be an efficient way to greatly improve their sensing properties and photocatalytic activity. In this work, zinc oxide (ZnO) tetrapod (T) ...
  • Effect of samarium addition and annealing on the properties of electrodeposited ceria thin films 
    ŻIVKOVIC, L.; LAIR, V.; LUPAN, O.; RINGUEDE, A. (ELSEVIER, 2011)
    Samarium (Sm)-doped ceria (CeO2) (SDC) is a promising material for high temperature electrochemical devices. Our work demonstrates that thin SDC films can be prepared by a cost-effective electrodeposition method at a ...
  • Functionalized Pd/ZnO Nanowires for Nanosensors 
    LUPAN, Oleg; POSTICA, Vasile; ADELUNG, Rainer; LABAT, Frédéric; CIOFINI, Ilaria; SCHÜRMANN, Ulrich; KIENLE, Lorenz; CHOW, Lee; VIANA, Bruno; PAUPORTÉ, Thierry (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2018)
    A method for surface doping and functionalization of ZnO nanowires (NWs) with Pd (Pd/ZnO) in a one-step process is presented. The main advantage of this method is to combine the simultaneous growth, surface doping, and ...
  • Buckminsterfullerene hybridized zinc oxide tetrapods: defects and charge transfer induced optical and electrical response 
    SMAZNA, Daria; RODRIGUES, Joana; SHREE, Sindu; POSTICA, Vasile; NEUBÜSER, Gero; MARTINS, A. F.; BEN SEDRINE, N.; JENA, Naresh K.; SIEBERT, Leonard; SCHÜTT, Fabian; LUPAN, Oleg; AHUJA, Rajeev; CORREIA, M. R.; MONTEIRO, Teresa; KIENLE, Lorenz; YANG, Ya; ADELUNG, Rainer; MISHRA, Yogendra Kumar (The Royal Society of Chemistry, 2018)
    Buckminster fullerene (C60) based hybrid metal oxide materials are receiving considerable attention because of their excellent fundamental and applied aspects, like semiconducting, electron transfer, luminescent behaviors, ...
  • Investigation of optical properties and electronic transitions in bulk and nano-microribbons of molybdenum trioxide 
    LUPAN, O; TROFIM, V.; CRETU, V.; STAMOV, I.; SYRBU, N. N.; TIGINYANU, I.; MISHRA, Y. K.; ADELUNG, R. (IOP Publishing, 2014)
    In this work, we report on crystalline quality and optical characteristics of molybdenum trioxide (MoO3) bulk and nano-microribbons grown by rapid thermal oxidation (RTO). The developed RTO procedure allows one to synthesize ...
  • Individual hollow and mesoporous aero-graphitic microtube based devices for gas sensing applications 
    LUPAN, Oleg; POSTICA, Vasile; MARX, Janik; MECKLENBURG, Matthias; MISHRA, Yogendra K.; SCHULTE, Karl; FIEDLER, Bodo; ADELUNG, Rainer (American Institute of Physics, 2017)
    In this work, individual hollow and mesoporous graphitic microtubes were integrated into electronic devices using a FIB/SEM system and were investigated as gas and vapor sensors by applying different bias voltages (in the ...
  • Highly luminescent columnar ZnO films grown directly on n-Si and p-Si substrates by low-temperature electrochemical deposition 
    LUPAN, Oleg; PAUPORTÉ, Thierry; URSAKI, V. V.; TIGINYANU, I. M. (ELSEVIER, 2011)
    In this study, nanocolumnar zinc oxide thin films were catalyst-free electrodeposited directly on n-Si and p-Si substrates, what makes an important junction for optoelectronic devices. We demonstrate that ZnO thin films ...
  • Schottky Diode Based on a Single Carbon–Nanotube–ZnO Hybrid Tetrapod for Selective Sensing Applications 
    POSTICA, Vasile; SCHÜTT, Fabian; ADELUNG, Rainer; LUPAN, Oleg (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2017)
    In this work, a general strategy to change the selectivity of individual ZnO tetrapod (ZnO-T)-Schottky diode-based devices by hybridization with carbon nanotubes (CNT) is presented. A microscale Schottky diode based on ...
  • 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 ...
  • Morphology dependent UV photoresponse of Sn-doped ZnO microstructures 
    POSTICA, V.; HOPPE, M.; GRÖTTRUP, J.; HAYES, P.; RÖBISCH, V.; SMAZNA, D.; ADELUNG, R.; VIANA, B.; ASCHEHOUG, P.; PAUPORTÉ, T.; LUPAN, O. (ELSEVIER, 2017)
    In this work, the UV sensing properties of Sn-doped and/or alloyed zinc oxide (ZnO) microstructures with different morphologies were investigated in order to elaborate the high performance UV photodetectors. We have compared ...
  • Optical properties of ZnO nanowire arrays electrodeposited on n- and p-type Si(111): Effects of thermal annealing 
    LUPAN, O.; PAUPORTÉ, Th.; TIGINYANU, I. M.; URSAKI, V. V.; HEINRICH, H.; CHOW, L. (ELSEVIER, 2011)
    Electrodeposition is a low temperature and low cost growth method of high quality nanostructured active materials for optoelectronic devices. We report the electrochemical preparation of ZnO nanorod/nanowire arrays on ...
  • Controlled Mixed Violet–Blue–Red Electroluminescence from Eu:Nano-Phosphors/ZnO-Nanowires/p-GaN Light-Emitting Diodes 
    LUPAN, Oleg; VIANA, Bruno; PAUPORTE, Thierry; DHAOUADI, Maroua; PELLE, Fabienne; DEVYS, Lucie; GACOIN, Thierry (American Chemical Society, 2013)
    Europium (Eu):Y2O3-nanoparticles/Mg:ZnO-nanowires/p-GaN and (Eu):chelate-based light-emitting diode (LED) structures have been fabricated, showing controlled mixed near-UV, violet, and red electroluminescence from trivalent ...
  • Sensing performances of pure and hybridized carbon nanotubes-ZnO nanowire networks: A detailed study 
    LUPAN, Oleg; SCHÜTT, Fabian; POSTICA, Vasile; SMAZNA, Daria; MISHRA, Yogendra Kumar; ADELUNG, Rainer (Springer Nature Limited, 2017)
    In this work, the influence of carbon nanotube (CNT) hybridization on ultraviolet (UV) and gas sensing properties of individual and networked ZnO nanowires (NWs) is investigated in detail. The CNT concentration was varied ...
  • In-situ boron doping of chemical-bath deposited CdS thin films 
    KHALLAF, Hani; CHAI, Guangyu; LUPAN, Oleg; CHOW, Lee; HEINRICH, Helge; PARK, S.; SCHULTE, Alfons (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2009)
    In-situ boron doping of CdS using chemical-bath deposition (CBD) is reported. The effect of B doping on optical properties, as well as electrical properties, crystal structure, chemistry, and morphology of CdS films is ...
  • Comparative study of the ZnO and Zn1−xCdxO nanorod emitters hydrothermally synthesized and electrodeposited on p-GaN 
    LUPAN, O.; PAUPORTÉ, T.; CHOW, L.; CHAI, G.; VIANA, B.; URSAKI, V. V.; MONAICO, E.; TIGINYANU, I. M. (ELSEVIER, 2012)
    Hydrothermal synthesis and electrodeposition are low-temperature and cost-effective growth techniques of high quality nanostructured active materials for opto-electronic devices. Here we report a hydrothermal seed layer-free ...
  • Synthesis and characterization of electrodeposited samaria and samaria-doped ceria thin films 
    LAIR, V.; ŽIVKOVIĆ, L. S.; LUPAN, O.; RINGUEDÉ, A. (ELSEVIER, 2011)
    Samaria (Sm2O3) and samaria-doped ceria (SDC) films are electrochemically deposited on stainless steel in view of a potential use in solid oxide fuel cells. As it is possible to deposit separately pure ceria (CeO2) and ...
  • Zinc oxide nanotetrapods with four different arm morphologies for versatile nanosensors 
    PAULOWICZ, Ingo; POSTICA, Vasile; LUPAN, Oleg; WOLFF, Niklas; SHREE, Sindu; COJOCARU, Ala; DENG, Mao; MISHRA, Yogendra Kumar; TIGINYANU, Ion; KIENLE, Lorenz; ADELUNG, Rainer (ELSEVIER, 2018)
    The structural morphology of metal oxide nano- and microstructures plays a crucial role in the performances of sensors and especially of nanosensors. Here, a simple approach on the synthesis of three-dimensional (3D) highly ...

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