Articole din publicaţii internaţionale: Recent submissions

  • 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 ...
  • FIB fabrication of ZnO nanotetrapod and cross-sensor 
    CHOW, Lee; LUPAN, Oleg; CHAI, Guangyu (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2010)
    This article presents the fabrication of zinc oxide (ZnO) nanotetrapod and cross-nanorods-based sensors. This low-dimensional device is made in a focused ion beam set-up by using nanodeposition for metal electrodes. The ...
  • Nitrogen oxides and ammonia sensing characteristics of SILAR deposited ZnO thin film 
    LUPAN, O. I.; SHISHIYANU, S. T.; SHISHIYANU, T. S. (ELSEVIER, 2007)
    Pure and Sn, Ni doped ZnO thin films were deposited on glass substrates using a novel successive ionic layer adsorption and reaction (SILAR) method at room temperature. Microstructures of the deposited films were optimized ...
  • Enhanced UV and ethanol vapour sensing of a single 3-D ZnO tetrapod alloyed with Fe2O3 nanoparticles 
    LUPAN, Oleg; POSTICA, Vasile; GRÖTTRUP, Jorit; MISHRA, Abhishek K.; DE LEEUW, Nora H.; ADELUNG, Rainer (ELSEVIER, 2017)
    Fabrication of multifunctional devices based on nano- and microstructures of a single semiconducting oxide is an important step for a better understanding of their maximum sensing properties and the base for the development ...
  • Low powered, tunable and ultra-light aerographite sensor for climate relevant gas monitoring 
    LUPAN, O.; POSTICA, V.; MECKLENBURG, M.; SCHULTE, K.; MISHRA, Y. K.; FIEDLER, B.; ADELUNG, R. (The Royal Society of Chemistry, 2016)
    Increasing atmospheric CO2 gas pollution and emergence of new types of green energy sources require continuous environmental monitoring. In this context, fast, efficient, light, robust, and reliable gas sensors that can ...
  • Integration of individual TiO2 nanotube on the chip: Nanodevice for hydrogen sensing 
    ENACHI, Mihail; LUPAN, Oleg; BRANISTE, Tudor; SARUA, Andrei; CHOW, Lee; MISHRA, Yogendra K.; GEDAMU, Dawit; ADELUNG, Rainer; TIGINYANU, Ion (WILEY-VCH Verlag GmbH \&Co. KGaA, Weinheim, 2015)
    Titania (TiO2) exists in several phases possessing different physical properties. In view of this fact, we report on three types of hydrogen sensors based on individual TiO2 nanotubes (NTs) with three different structures ...
  • Three-dimensional flexible ceramics based on interconnected network of highly porous pure and metal alloyed ZnO tetrapods 
    GRÖTTRUP, Jorit; PAULOWICZ, Ingo; SCHUCHARDT, Arnim; KAIDAS, Victor; KAPS, Sören; LUPAN, Oleg; ADELUNG, Rainer; MISHRA, Yogendra Kumar (ELSEVIER, 2016)
    Flexible and porous three-dimensional (3-D) ceramics made from inorganic metal oxide nano- and micro-structures are going to be material candidates for future nanotechnologies. In the present work an attempt in this direction ...
  • Photoluminescence of chemical bath deposited ZnO:Al films treated by rapid thermal annealing 
    SHISHIYANU, S. T.; LUPAN, O. I.; MONAICO, E. V.; URSAKI, V. V.; SHISHIYANU, T. S.; TIGINYANU, I. M. (ELSEVIER, 2005)
    Aluminum-doped zinc oxide (ZnO:Al) films fabricated by chemical bath deposition are characterized using scanning electron microscopy and photoluminescence (PL) spectroscopy. The impact of rapid thermal annealing (RTA) upon ...
  • Rapid thermal annealing induced change of the mechanism of multiphonon resonant Raman scattering from ZnO nanorods 
    URSAKI, V. V.; LUPAN, O. I.; CHOW, L.; TIGINYANU, I. M.; ZALAMAI, V. V. (ELSEVIER, 2007)
    Multiphonon Resonant Raman scattering (RRS) excited by 351.1 and 363.8 nm lines of an Ar+ laser was studied at temperatures from 10 to 300 K in as-grown and rapid thermal annealed (RTA) aluminum doped ZnO nanorods synthesized ...
  • Growth of tetragonal SnO2 microcubes and their characterization 
    LUPAN, O.; CHOW, L.; CHAI, G.; HEINRICH, H.; PARK, S.; SCHULTE, A. (ELSEVIER, 2008)
    Single-crystalline SnO2 microcubes were grown using the hydrothermal method without any catalyst. X-ray diffraction (XRD) patterns and energy dispersive X-ray (EDX) analysis verified that the cubes are tin dioxide SnO2. ...
  • Sacrificial template synthesis and properties of 3D hollow-silicon nano- and microstructures 
    HÖLKEN, Iris; NEUBÜSER, Gero; POSTICA, Vasile; BUMKE, Lars; LUPAN, Oleg; BAUM, Martina; MISHRA, Yogendra Kumar; KIENLE, Lorenz; ADELUNG, Rainer (The Royal Society of Chemistry, 2016)
    Novel three-dimensional (3D) hollow aero-silicon nano- and microstructures, namely, Si-tetrapods (Si-T) and Si-spheres (Si-S) were synthesized by a sacrificial template approach for the first time. The new Si-T and Si-S ...
  • PdO/PdO2 functionalized ZnO:Pd films for lower operating temperature H2 gas sensing 
    LUPAN, Oleg; POSTICA, Vasile; HOPPE, Mathias; WOLFF, Niklas; POLONSKYI, Oleksandr; PAUPORTÉ, Thierry; VIANA, Bruno; MAJÉRUS, Odile; KIENLE, Lorenz; FAUPEL, Franz; ADELUNG, Rainer (The Royal Society of Chemistry, 2018)
    Through this work, we propose a novel strategy to grow and modulate the density of PdO/PdO2 nanoparticles uniformly on nanostructured Pd-doped ZnO (ZnO:Pd) films by a one-step solution approach followed by thermal annealing ...
  • Fabrication and characterization of an individual ZnO microwire-based UV photodetector 
    CHAI, G. Y.; CHOW, L.; LUPAN, O.; RUSU, E.; STRATAN, G. I.; HEINRICH, H.; URSAKI, V. V.; TIGINYANU, I. M. (ELSEVIER, 2011)
    In this paper, a single ZnO microwire-based photodetector for the monitoring of ultraviolet (UV) radiation is described. Single crystal ZnO microwires were synthesized using a chemical vapor deposition (CVD) on the Si or ...
  • Chemical bath deposition of SnO2 and Cd2SnO4 thin films 
    KHALLAF, Hani; CHEN, Chia-Ta; CHANG, Liann-Be; LUPAN, Oleg; DUTTA, Aniruddha; HEINRICH, Helge; HAQUE, Firoze; DEL BARCO, Enrique; CHOW, Lee (ELSEVIER, 2012)
    A new approach of chemical bath deposition (CBD) of SnO2 thin films is reported. Films with a 0.2μm thickness are obtained using the multi-dip deposition approach with a deposition time as little as 8–10min for each dip. ...

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