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Browsing Articole ştiinţifice by Subject "gas sensors"

Browsing Articole ştiinţifice by Subject "gas sensors"

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  • Impedance Characterization of Gas Sensitive Chalcogenide Films 
    TSIULYANU, Dumitru; CIOBANU, Marina; MOCREAC, Olga (Springer Nature Switzerland, 2018)
    The gas sensing performance of chalcogenide thin films, investigated by the method of impedance spectroscopy is reported and discussed in order to assess their use in future gas sensors operating at room temperature.
  • Impedance Spectroscopy of Tellurium Thin Films Sensitive to NO2 
    TSIULYANU, D.; MOCREAC, O. (Springer Nature Switzerland, 2011)
    Impedance spectra of tellurium thin films with interdigital platinum electrodes have been measured in dry synthetic air and gaseous media with nitrogen dioxide. Analyses of Cole-Cole plots allowed to evaluate the characteristic ...
  • Improving gas sensing by CdTe decoration of individual Aerographite microtubes 
    STROBEL, Julian; GHIMPU, Lidia; POSTICA, Vasile; LUPAN, Oleg; ZAPF, Maximilian; SCHÖNHERR, Sven; RÖDER, Robert; RONNING, Carsten; SCHÜTT, Fabian; MISHRA, Yogendra Kumar; TIGINYANU, Ion; ADELUNG, Rainer; MARX, Janik; FIEDLER, Bodo; KIENLE, Lorenz (IOP Publishing Ltd, 2018)
    Novel gas sensors have been realized by decorating clusters of tubular Aerographite with CdTe using magnetron sputtering techniques. Subsequently, individual microtubes were separated and electrically contacted on a SiO2/Si ...
  • 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 ...
  • 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 ...
  • Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe2O3 Nanowire 
    LUPAN, Oleg; POSTICA, Vasile; WOLFF, Niklas; POLONSKYI, Oleksandr; DUPPEL, Viola; KAIDAS, Victor; LAZARI, Eugen; ABABII, Nicolai; FAUPEL, Franz; KIENLE, Lorenz; ADELUNG, Rainer (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2017)
    A composed morphology of iron oxide microstructures covered with very thin nanowires (NWs) with diameter of 15–50 nm has been presented. By oxidizing metallic Fe microparticles at 255 °C for 12 and 24 h, dense iron oxide ...
  • 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 ...
  • Low-Temperature Solution Synthesis of Au-Modified ZnO Nanowires for Highly Efficient Hydrogen Nanosensors 
    LUPAN, Oleg; POSTICA, Vasile; WOLFF, Niklas; SU, Jun; LABAT, Frédéric; CIOFINI, Ilaria; CAVERS, Heather; ADELUNG, Rainer; POLONSKYI, Oleksandr; FAUPEL, Franz; KIENLE, Lorenz; VIANA, Bruno; PAUPORTÉ, Thierry (American Chemical Society, 2019)
    In this research, the low-temperature single-step electrochemical deposition of arrayed ZnO nanowires (NWs) decorated by Au nanoparticles (NPs) with diameters ranging between 10 and 100 nm is successfully demonstrated for ...
  • Microsensor on single ZnO microwire 
    CHAI, G.; RUSU, E.; CHOW, L.; STRATAN, G. I.; HEINRICH, H.; PARK, S.; SCHULTE, A.; LUPAN, O.; TROFIM, V.; RAILEAN, S. (Institute of Electrical and Electronics Engineerings, IEEE, 2009)
    For development of individual ZnO microwire in hydrogen sensors an environmentally benign synthesis process and fabrication route are required. Here we report a synthesis route for ZnO microwires using vapour phase process. ...
  • Microtechnology with SILAR and RPP for semiconductor oxide gas sensors 
    SHISHIYANU, S. T.; SHISHIYANU, T. S.; LUPAN, O. I. (Institute of Electrical and Electronics Engineerings, IEEE, 2005)
    Microtechnology with Successive Ionic Layer Adsorption and Reaction (SILAR) technique and rapid photothermal processing (RPP) was elaborated and applied for semiconductor oxides gas sensors. The experimental results shown ...
  • Multifunctional Materials: A Case Study of the Effects of Metal Doping on ZnO Tetrapods with Bismuth and Tin Oxides 
    POSTICA, Vasile; GRÖTTRUP, Jorit; ADELUNG, Rainer; LUPAN, Oleg; MISHRA, Abhishek Kumar; LEEUW, Nora H. de; ABABII, Nicolai; CARREIRA, José F. C.; RODRIGUES, Joana; SEDRINE, Nebiha Ben; CORREIA, Maria Rosário; MONTEIRO, Teresa; SONTEA, Victor; MISHRA, Yogendra Kumar (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2017)
    Hybrid metal oxide nano- and microstructures exhibit novel properties, which make them promising candidates for a wide range of applications, including gas sensing. In this work, the characteristics of the hybrid ZnOBi2O3 ...
  • The nature of processes controlling the kinetics of indium oxide-based thin film gas sensor response 
    KOROTCENKOV, Ghenadii; BRINZARI, Vladimir; STETTER, Joseph R.; BLINOV, Iuri; BLAJA, Valeriu (Elsevier, 2007)
    This paper analyzes the processes controlling the rate of conductivity response of In2O3-based thin film sensors to both reducing and oxidizing gases. In2O3 films with a thickness from 20 to 400nm were deposited using a ...
  • Non-planar nanoscale p–p heterojunctions formation in ZnxCu1−xOy nanocrystals by mixed phases for enhanced sensors 
    LUPAN, Oleg; CRETU, Vasilii; POSTICA, Vasile; POLONSKYI, Oleksandr; ABABII, Nicolai; SCHÜTT, Fabian; KAIDAS, Victor; FAUPEL, Franz; ADELUNG, Rainer (ELSEVIER, 2016)
    The copper oxides are advanced materials due to their remarkable sensing, optical, electrical, thermal and magnetic performances. Nanostructuring and doping of copper oxides enhance further the possible features of these ...
  • Novel hydrogen gas sensor based on single ZnO nanorod 
    LUPAN, Oleg; CHAI, Guangyu; CHOW, Lee (ELSEVIER, 2008)
    For extensive use in an industrialized process of individual ZnO nano/microrods as building nanoblock in novel hydrogen sensors, a simple, inexpensive, and bio-safe synthesis process and nanofabrication route is required. ...
  • Optical and sensory properties of ZnO nanofibrous layers grown by magnetron sputtering 
    GHIMPU, L.; TIGINYANU, I. M.; URSAKI, V.; LUPAN, O.; CHOW, L.; RUDZEVICH, Y.; LIN, Y. (Institute of Electrical and Electronics Engineerings, IEEE, 2012)
    This paper presents optical and sensory properties of ZnO nanofirous layers grown by a cost-effective and fast fabrication method based on magnetron sputtering. The as-prepared nanofibrous layers show good conductive ...
  • Optimization of thin-film gas sensors for environmental monitoring through theoretical modeling 
    BRYNZARI, Vladimir I.; KOROTCHENKOV, Ghennadii S.; SCHWANK, Johannes W. (SPIE, 1999)
    The task of optimization of gas sensor characteristics such as absolute value and temperature range of sensitivity, time response and selectivity is one of the most important problems of gas sensor design. Unfortunately, ...
  • Oxide planar p–n heterojunction prepared by low temperature solution growth for UV-photodetector applications 
    LUPAN, O.; KOUSSI-DAOUD, S.; VIANA, B.; PAUPORTÉ, T. (The Royal Society of Chemistry, 2016)
    The paper presents the low temperature growth of a planar p-NiO/n-ZnO/FTO heterostructure for efficient detection of soft UV light. n-ZnO was prepared at 60°C using an aqueous bath of zinc nitrate precursor. The 2D layer ...
  • Pd-Functionalized ZnO:Eu Columnar Films for Room-Temperature Hydrogen Gas Sensing: A Combined Experimental and Computational Approach 
    LUPAN, Cristian; KHALEDIALIDUSTI, Rasoul; MISHRA, Abhishek Kumar; POSTICA, Vasile; TERASA, Maik-Ivo; MAGARIU, Nicolae; PAUPORTÉ, Thierry; VIANA, Bruno; DREWES, Jonas; VAHL, Alexander; FAUPEL, Franz; ADELUNG, Rainer (American Chemical Society, 2020)
    Reducing the operating temperature to room temperature is a serious obstacle on long-life sensitivity with long-term stability performances of gas sensors based on semiconducting oxides, and this should be overcome by new ...
  • Properties of ZnO:Fe nanostructured films grown by successive chemical synthesis 
    POSTICA, V.; HOPPE, M.; ABABII, N.; TROFIM, V.; RAILEAN, S.; ADELUNG, R.; LUPAN, O. (Institute of Electrical and Electronics Engineerings, IEEE, 2016)
    Rapid progress of nanotechnology in recent years and continuous minimization of portable devices created the necessity of multifunctional devices elaboration. In this work, the morphological, structural and sensing properties ...
  • Room temperature a.c. operating gas sensors based on quaternary chalcogenides 
    TSIULYANU, D.; CIOBANU, M. (Elsevier, 2016)
    Impedance spectra of quaternary As–Ge–S–Te based alloys were investigated in both dry synthetic air and mixture with nitrogen dioxide in order to assess the use of these materials in future gas sensors working at room ...

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