Browsing by Subject "gas sensors"

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  • Effect of annealing and temperature on the NO2 sensing properties of tellurium based films 
    TSIULYANU, D.; MARIAN, S.; LIESS, H.-D.; EISELE, I. (Elsevier, 2004)
    Influences of temperature and annealing on the electrical and sensing properties toward NO2 of tellurium based films were investigated. The annealing at temperatures more than 100°C causes a sharp decrease both of electrical ...
  • 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 ...
  • Fabrication of ZnO nanorod-based hydrogen gas nanosensor 
    LUPAN, Oleg; CHAI, Guangyu; CHOW, Lee (ELSEVIER, 2007)
    We report a first work on nanofabrication of hydrogen nanosensor from single ZnO branched nanorods (tripod) using in-situ lift-out technique and performed in the chamber of focused ion beam (FIB) system. Self-assembled ZnO ...
  • Functionalization process of ZnO nanowire surface with Pd and PdO/PdO2 
    POSTICA, Vasile; PAUPORTÉ, Thierry; TROFIM, Viorel; ABABII, Nicolai; LUPAN, Oleg (Technical University "Gheorghe Asachi" of Iași, 2019)
    Invenţia se referă la nanotehnologia semiconductorilor oxizi, în particular la electrodepunerea nanofirelor de ZnOfuncționalizate cu nanoparticule din paladiu (Pd) și oxizi micști de PdO/PdO2, într-un singură ...
  • 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 ...
  • 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 and Pressure Sensors 
    GHIMPU, Lidia (Romanian Inventors Forum, 2020)
    This invention relates to the manufacture of gas and pressure sensors based on thin oxide layers. The oxide thin layers were obtained by the RF magnetron sputtering method. Carbon substrates and fiber optics were used in ...
  • Gas sensor based on MoO3 
    CREȚU, Vasilii; TROFIM, Viorel; SONTEA, Victor; LUPAN, Oleg (Technical University "Gheorghe Asachi" of Iași, 2018)
    Invenția se referă la tehnica semiconductorilor oxizi, in particular la senzori de gaze pe bază de oxid de molibden.Senzorul de gaze pe bază de MoO3 include un substrat dielectric, pe una din suprafețele căruia este amplasat ...
  • 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 ...
  • Ge–As–Te-based gas sensor selective to low NO2 concentrations 
    MARIAN, S.; TSIULYANU, D.; LIESS, H.-D. (Elsevier, 2001)
    A new kind of gas sensor based on chalcogenide glassy semiconductors for the detection of nitrogen dioxide has been investigated. It contains a sandwich metal–semiconductor (Ge–As–Te ternary alloys)–metal structure which ...
  • 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, ...
  • Heterostructure-based devices with enhanced humidity stability for H2 gas sensing applications in breath tests and portable batteries 
    LUPAN, Oleg; ABABII, Nicolai; MISHRA, Abhishek Kumar; BODDULURI, Mani Teja; MAGARIU, Nicolae; Alexander VAHL, Alexander VAHL; KRÜGER, Helge; WAGNER, Bernhard; FAUPEL, Franz; ADELUNG, Rainer; LEEUW, Nora H. de; HANSEN, Sandra (Elsevier, 2021)
    Semiconducting metal oxide - based gas sensors exhibit outstanding sensitivity, although humidity in the analyte typically hampers precise measurements. In this work it was shown that a 5−6 nm thin Al2O3 nano-layer is ...
  • High sensitive tellurium based NO2 gas sensor 
    TSIULYANU, D.; MARIAN, S.; MIRON, V.; LIESS, H.-D. (Elsevier, 2001)
    For the first time it is shown, that tellurium based thin films exhibit high sensitivity to nitrogen dioxide at room temperature. The resistance of the tellurium films decreases reversibly in the presence of NO2. The ...
  • High-Performance Gas Sensors Using Heterostructures based on Binary and Ternary Metal Oxides 
    ABABII, Nicolai; BODDULURI, Mani Teja; KRÜGER, Helge; HANSEN, Sandra; POSTICA, Vasile; LUPAN, Oleg; ADELUNG, Rainer (IEEE, 2021)
    The gas sensing properties of heterojunctions based on binary and ternary metal oxides (CuAl 2 O 4 /Al 2 O 3 /CuO/Cu 2 O, ZnAl 2 O 4 /ZnO and Zn 2 SnO 4 ) were investigated in detail and demonstrated excellent sensitivity ...

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