Articole din publicaţii internaţionale: Recent submissions

  • Effect of rapid thermal annealing on properties of ZnO:Ag nanostructures 
    POSTICA, Vasile; LUPAN, Oleg; ADELUNG, Rainer; PAUPORTÉ, Thierry (Society of Photo-Optical Instrumentation Engineers, SPIE, 2017)
    Previous reports clearly demonstrates that Ag-doping of ZnO lead to the diminution of the concentration of donor defects for the compensation of the n-type conductivity [1], while thermal annealing (TA) and rapid treatment ...
  • H2 gas sensing properties of a ZnO/CuO and ZnO/CuO/Cu2O Heterostructures 
    ABABII, N.; POSTICA, V.; HOPPE, M.; ADELUNG, R.; LUPAN, O.; RAILEAN, S.; PAUPORTÉ, T.; VIANA, B. (Society of Photo-Optical Instrumentation Engineers, SPIE, 2017)
    The most important parameters of gas sensors are sensitivity and especially high selectivity to specific chemical species. To improve these parameters we developed sensor structures based on layered semiconducting oxides, ...
  • Single nanowire nanosensors: Fabrication and detailed studies 
    LUPAN, O.; POSTICA, V.; LAZARI, E.; GRÖTTRUP, J.; KAIDAS, V.; ADELUNG, R. (IEEE, 2017)
    Individual metal oxide nanostructures are ideal building blocks for ultra-low-power and high performance sensing devices. Due to their multifunctionality, they are promising candidates for future optoelectronic and gas ...
  • Synthesis and optical properties of Ga2O3 nanowires grown on GaS substrate 
    LEONTIE, Liviu; SPRINCEAN, Veaceslav; UNTILA, Dumitru; SPALATU, Nicolae; CARAMAN, Iuliana; COJOCARU, Ala; ŞUŞU, Oana; LUPAN, Oleg; EVTODIEV, Igor; VATAVU, Elmira; TIGINYANU, Ion; CARLESCU, Aurelian; CARAMAN, Mihail (ELSEVIER, 2019)
    Gallium oxide (β-Ga2O3) nanowires were synthesized by heat treatment of single crystal β-GaS plates in air. Crystal structure and composition of synthesized materials were studied by X-ray diffraction, energy dispersive ...
  • ZnO nanowires grown by chemical deposition and rapid photothermal processing 
    SHISHIYANU, T.; LUPAN, O.; CHOW, L.; SHISHIYANU, S.; RAILEAN, S. (Institutul de Inginerie Electronică şi Nanotehnologii "D. Ghiţu" al AŞM, 2008)
    Chemical deposition aqueous method has been developed to synthesize a new generation of smart and functional nanostructured zinc oxide thin films. This chemical process uses stable and inexpensive metal inorganic salts and ...
  • Nanofibrous zinc oxide films synthesized by magnetron sputtering 
    GHIMPU, L.; LUPAN, O.; POPESCU, S.; URSAKI, V.; TIGINYANU, I.; CHOW, L.; CHAI, G.; PARK, S.; SCHULTE, A. (IEEE, 2011)
    ZnO nanofibrous-based materials required for sensors and dye-solar cells have been grown on tin oxide/glass substrates by magnetron sputtering. Synthesis regimes have been identified that give nanoporous and nanofibrous ...
  • ZnO Hydrogen Nanoscale Sensors 
    LUPAN, Oleg; CHOW, Lee (Springer International Publishing Switzerland, 2013)
    Hydrogen has the potential to play an important role in energy and automobile industries in our society. Being an explosive gas, hydrogen is also a colorless and odorless gas; therefore, there is a great need to develop ...
  • Blue-red electroluminescence from hybrid Eu:phosphors/ZnO-nanowires/p-GaN LED 
    VIANA, B.; PAUPORTE, T.; LUPAN, O.; DEVIS, L.; GACOIN, T. (SPIE, Society of Photo-Optical Instrumentation Engineers, 2014)
    Nanowire (NW) based light emitting diodes (LEDs) have drawn great research interest due to many advantages compared to thin film based devices. Marked improved performances are expected from nanostructured active layers ...
  • UV radiation and CH4 gas detection with a single ZnO:Pd nanowire 
    LUPAN, O.; ADELUNG, R.; POSTICA, V.; ABABII, N.; SHOW, L.; VIANA, B.; PAUPORTÉ, T. (SPIE, Society of Photo-Optical Instrumentation Engineers, 2017)
    There is an increasing demand for sensors to monitor environmental levels of ultraviolet (UV) radiation and pollutant gases. In this work, an individual nanowire of Pd modified ZnO nanowire (ZnO:Pd NW) was integrated in a ...
  • Individual CdS-covered aerographite microtubes for room temperature VOC sensing with high selectivity 
    GHIMPU, Lidia; LUPAN, Oleg; POSTICA, Vasile; STROBEL, Julian; KIENLE, Lorenz; TERASA, Maik-Ivo; MINTKEN, Mona; TIGINYANU, Ion; MARX, Janik; FIEDLER, Bodo; ADELUNG, Rainer (ELSEVIER, 2019)
    The synthesis of new nanomaterials with a large surface-to-volume ratio is of high interest for sensing applications, and especially for gas sensors with high performances. In this work, a thin layer of CdS is deposited ...
  • Electrochemical synthesis and properties of ceria films grown on stainless steel 
    ŽIVKOVIC, Lj. S.; LAIR, V.; LUPAN, O.; RINGUEDE, A. (Springer Link, 2011)
    Electrochemical synthesis of ceria films was performed on a stainless steel substrate in view of Solid Oxide Fuel Cells (SOFC) applications. Films were obtained from aqueous nitrate solutions via cathodic deposition method ...
  • Toward blue emission in ZnO based LED 
    VIANA, Bruno; PAUPORTÉ, Thierry; LUPAN, Oleg; LE BAHERS, Tangui; CIOFINI, Ilaria (SPIE, 2013)
    The bandgap engineering of ZnO nanowires by doping is of great importance for tunable light emitting diode (LED) applications. We present a combined experimental and computational study of ZnO doping with Cd or Cu atoms ...
  • Electrodeposited ZnO nanowire-based light-emitting diodes with tunable emission from near-UV to blue 
    PAUPORTÉ, Thierry; LUPAN, Oleg; VIANA, Bruno (SPIE, Society of Photo-Optical Instrumentation Engineers, 2013)
    The bandgap control of doped-ZnO nanowires is important for tunable light emitting diodes (LEDs). Ultraviolet (UV), blue and violet LED structures based on Ag-doped ZnO /p-GaN and Cd-alloyed ZnO (Zn1-xCdxO) nanorods/p-GaN ...
  • Electrochemical and Hydrothermal Synthesis of Epitaxial Arrays of Doped Zn Nanowire Emitters for Light Emitting Diodes With Tunable Emission From Near-UV to Blue 
    PAUPORTE, T.; LUPAN, O.; VIANA, B. (The Electrochemical Society, 2013)
    The bandgap control of doped-ZnO nanowires is important for tunable light emitting diodes (LEDs). Ultraviolet (UV), violet, blue and near-white LED structures based on Cu- or Ag-doped ZnO /p-GaN and Cd-alloyed ZnO (Zn1-xCdxO) ...
  • Effect of Al Sn — Doping on properties of zinc oxide nanostructured films grown by magnetron sputtering 
    GHIMPU, Lidia; TIGINYANU, Ion; LUPAN, Oleg; MISHRA, Yogendra Kumar; PAULOWICZ, Ingo; GEDAMU, Dawit; COJOCARU, Ala; ADELUNG, Rainer (IEEE, 2013)
    Metal doping in nanostructured zinc oxide is important for device applications. To obtain improved performances for practical applications, Aluminum (Al) and Tin (Sn)-doping in zinc oxide nanostructured layers were ...
  • Integration of metal and metal oxide nanowires directly on chip by top-down technology and their electrical characteristics 
    GEDAMU, Dawit; LUPAN, Oleg; MISHRA, Yogendra Kumar; ADELUNG, Rainer (American Scientific Publishers, 2014)
    In this work we present the fabrication of metal and metal oxide nanowires directly on chip by a new top-down technique based on thin film fracture (TFF) approach. Developed procedure works in a simple principle of ...
  • Concept and modelling of memsensors as two terminal devices with enhanced capabilities in neuromorphic engineering 
    VAHL, Alexander; CARSTENSEN, Jürgen; KAPS, Sören; LUPAN, Oleg; STRUNSKUS, Thomas; ADELUNG, Rainer; FAUPEL, Franz (Springer Nature Limited, 2019)
    We report on memsensors, a class of two terminal devices that combines features of memristive and sensor devices. Apart from a pinched hysteresis (memristive property) and stimulus dependent electrical resistance (sensing ...
  • Electric Field Assisted-Assembly of Perpendicular Oriented ZnO Nanorods on Si Substrate 
    LUPAN, O.; CHOW, L.; CHAI, G.; PARK, S.; SCHULTE, A. (NSTI, 2008)
    In this work, we report a new electric-field assisted assembly technique used to vertically-align ZnO nanorods on the Si substrate during their growth. In the assembly process, the forces that induce the alignment are a ...
  • Ethanol Sensing Performances of Zinc-doped Copper Oxide Nano-crystallite Layers 
    CRETU, V.; POSTICA, V.; ABABII, N.; SCHÜTT, F.; HOPPE, M.; SMAZNA, D.; TROFIM, V.; SONTEA, V.; ADELUNG, R.; LUPAN, O. (Sumy State University, 2015)
    The synthesis via chemical solutions (aqueous) (SCS) wet route is a low-temperature and cost-effective growth technique of high crystalline quality oxide semiconductors films. Here we report on morphology, chemical ...
  • Low temperature preparation of Ag-doped ZnO nanowire arrays for sensor and light-emitting diode applications 
    LUPAN, O.; VIANA, B.; CRETU, V.; POSTICA, V.; ADELUNG, R.; PAUPORTÉ, T. (SPIE, Society of Photo-Optical Instrumentation Engineers, 2016)
    Transition metal doped-oxide semiconductor nanostructures are important to achieve enhanced and new properties for advanced applications. We describe the low temperature preparation of ZnO:Ag nanowire/nanorod (NW/NR) arrays ...

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