Browsing Conferinţe by Subject "gas sensors"

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  • Al2O3/CuO non-planar heterostructures for VOCs vapors detection 
    MAGARIU, Nicolae; ABABII, Nicolai; POSTICA, Vasile; MANI, Teja Bodduluri; LUPAN, Oleg; ADELUNG, Rainer; HANSEN, Sandra (Technical University of Moldova, 2021)
    In this work, the gas sensing properties of the non-planar heterostructures based on CuO thin films, grown by the direct ink writing and covered with an ultrathin Al2O3 layer, are presented as a function of the operating ...
  • Chalcogenide semiconductors as gas sensors 
    TSIULYANU, Dumitru (Technical University of Moldova, 2005)
    A brief survey of experimental results to gas sensing with chalcogenide semiconductor based devices is given. It is pointed out that physical phenomena such as electrical conductivity can be coupled to chemical reactions ...
  • Conductance and Photoconductance of Indium Oxide-Zinc Oxide Composites in the Hydrogen-Containing Atmosphere 
    ILIN, A. S.; FORSH, P. A.; IKIM, M. I.; KOROLEVA, A. V.; MARTYSHOV, M. N.; TRAKHTENBERG, L. I.; KASHKAROV, P. K. (Tehnica UTM, 2019)
    Photovoltaic properties of composites based on nanocrystalline indium and zinc oxides, promising as sensitive elements of gas sensors, were investigated. It is shown that under visible light the conductivity of composites ...
  • CuO-plate decorated ZnO nanostructures and their sensing performances 
    LITRA, Dinu; LUPAN, Cristian; ZADOROJNEAC, Tudor; CHIRIAC, Maxim; DEPRI, Nadine; LUPAN, Oleg; ADELUNG, Rainer; SIEBERT, Leonard (Technical University of Moldova, 2022)
    In this paper, we report on the gas sensing properties of mixed oxide Zn-Cu nanostructures obtained by self-organized chemical deposition are presented. The nanosensors are made from individual ZnO whiskers and are coated ...
  • The Device for Conversion and Displaying Ecological Information Using Sensors on the Base of ZnO Films 
    SHISHIANU, S.; VERJBITKI, V.; SHISHIANU, T.; MACHIDON, A. (Technical University of Moldova, 2013)
    Gas-sensors based on ZnO films give an opportunity to measure some parameters of gase-medium in a large band of temperature and pressure. In this article is described the device which allows measuring and imaging on display ...
  • Effect of contacts and thickness on the NO2 sensing properties of tellurium based films 
    TSIULYANU, Alexantru (Technical University of Moldova, 2005)
    The influence of contacting materials, and thickness of the tellurium based films on their electrical conductivity and sensitivity to NO2 is given. It is shown that until thickness is below 100 nm the conductivity increases ...
  • Effect of Dopant on Selectivity of CuO Nanostructured Films – Based Sensors 
    CRETU, V.; POSTICA, V.; ABABII, N.; MAGARIU, N.; SONTEA, V.; SCHÜTT, F.; ADELUNG, R.; LUPAN, O. (Tehnica UTM, 2015)
    In this work, the effect of different dopants on selectivity performance of gas sensor structures based on CuO nano-structured films that were synthesized from aqueous chemical solutions SCS is reported.
  • Effects of Heat Treatment on Palladium-doped Zinc Oxide on Sensory Selectivity 
    MAGARIU, N. (Tehnica UTM, 2019)
    In this paper I investigated the sensor response based on palladium-doped zinc oxide. How did the hydrogen and ethanol response change to a simple sensor that was not treated quickly and a heat treatment at 650 oC.
  • Epitaxial In2O3 layers for chemical sensors: structural and surface characterization 
    BRINZARI, V.; KOROTCENKOV, G.; MASEK, K.; MATOLIN, V.; LIBRA, J.; KAMEI, M. (Technical University of Moldova, 2005)
    Indium oxide is one of the basic oxides, which have been extensively studied [1-3] due to its prominent applications for gas sensor design, and as modeling material, possessed of some interesting chemical and structural ...
  • Fabrication MEMS Platform for Sensors Applications by Laser Micro Engraving 
    IVANOVA, A. V.; OBLOV, K. Y.; SOLOVIEV, S. A.; SAMOTAEV, N. N.; GURKOVSKIY, B. V.; MIRONOV, V. D. (Tehnica UTM, 2015)
    The target of this work is the demonstration of advanced novel approaches able to provide rapid prototyping by using laser technology ceramic MEMS platforms for chemical sensor operating under harsh environmental conditions ...
  • Gamma Radiation Sensitization of ZnO/Al2O3 Sensors Based on Nanoheterostructures 
    LUPAN, Cristian; BÎRNAZ, Adrian; BUZDUGAN, Artur; MAGARIU, Nicolae; LUPAN, Oleg (Springer Nature Switzerland, 2023)
    A study of the influence of gamma radiation on the electrical and sensing properties of ZnO/Al2O3 core@shell heterostructure has been carried out in this work. Using as radiation source Cs-137, a low level of ionizing ...
  • Gas sensor performances of α-MoO3 belts nanostructured with Pd 
    CRETU, V.; POSTICA, V.; ABABII, N.; TROFIM, V.; RAILEAN, S.; LUPAN, O. (Technical University of Moldova, 2016)
    Molybdenum trioxide (MoO3) due to its unique physical and chemical properties is one of the most attractive candidates for different promising technological applications]. (MoO3 has a unique morphology that resembles a ...
  • Gas sensors based on optical fiber coated with nanocrystalline TiO2 and nanofibrous ZnO 
    GHIMPU, Lidia; PLESCO, Irina; URSACHI, Veaceslav; TIGINYANU, Ion; ZARRELLI, Mauro; ZOTTI, Aldobeneddetto; BORRIELLO, Anna (Technical University of Moldova, 2017)
    The paper is divided into two main sections: first, we report on magnetron sputtering of zinc oxide and titanium dioxide; second, the results of the investigation of the morphology and sensing characteristics of the optical ...
  • Gas sensors research and control system 
    BRAGARENCO, A.; PLOTNIC, P.; SONTEA, V. (2005)
    An installation for the gas sensors research has been made. The installation is connected to the computer by AT90S8535 microprocesor. The device allows obtaining the following dependences simultaneously: sensibility ...
  • Hydrogen detection by individual Pd-modified ZnO nanowire 
    LUPAN, Oleg; PAUPORTÉ, Thierry; POSTICA, Vasile; VIANA, Bruno; ADELUNG, Rainer; CHOW, Lee; TIGINYANU, Ion (Technical University of Moldova, 2017)
    In this work an individual Pd-modified ZnO nanowire (Pd/ZnO NW) was integrated into a nanosensor device using focused ion beam (FIB)/scanning electron microscopy (SEM) system. The Pd/ZnO arrays were synthesized by ...
  • Hydrogen detector based on GaN nanocones 
    POPA, V.; VOLCIUC, O.; SONTEA, V.; TIGINYANU, I. M. (Technical University of Moldova, 2005)
    In this paper, we demonstrate that using GaN nanocone morphology obtained by photo electrochemical etching, it is possible to obtain very stable and easy in manufacturing gas sensors, in particular for hydrogen detection.
  • Hydrogen Gas Sensor Based on Nanograined Pd/α-MoO3 belts 
    CRETU, V.; POSTICA, V.; STOIANOV, D.; TROFIM, V.; SONTEA, V.; LUPAN, O. (Tehnica UTM, 2015)
    In this work, a simple and cost-effective method for nanostructurization of α-MoO3 micro-belts by using an aqueous solution of PdCl2 is reported. Obtained nanograined Pd/α-MoO3 belts, with 70-80 nm average diameters of ...
  • Impedance Characterization of Gas Sensitive S - Te Based Quaternary Chalcogenides 
    TSIULYANU, D.; CIOBANU, M. (Tehnica UTM, 2015)
    Impedance spectra of quaternary S -Te based alloys were investigated in both dry synthetic air and mixture with nitrogen dioxide in order to assess their use in future gas sensors working at room temperature. To elucidate ...
  • Influence of TiO2 Ultra-Thin Films on Gas Sensing Properties of CuO:Zn 
    ABABII, Nicolai; REIMER, Tim; POSTICA, Vasile; HOPPE, Mathias; CHEMNITZ, Steffen; SONTEA, Victor; BENECKE, Wolfgang; ADELUNG, Rainer; LUPAN, Oleg (Technical University of Moldova, 2017)
    Copper oxide is a p-type metal oxide with remarkable optical, electrical, thermal and sensing properties. The oxidation of Cu2O to CuO can be performed by thermal annealing at relatively low temperatures. The present study ...
  • Measuring approach for semiconductor nanostructured gas sensors parameters 
    VERJBITKI, Valeriu; RAILEAN, Serghei; LUPAN, Oleg (Tehnica UTM, 2019)
    The development of new technologies for extracting and testing the parameters of nanostructures based on semiconductor oxides required the development of special instruments for measuring the parameters of such structures ...

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