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Ethanol and Hydrogen Gas-Sensing Properties of CuO–CuFe2O4 Nanostructured Thin Films

De, Saptarshi and Venkataramani, Narayanan and Prasad, Shiva and Dusane, Rajiv Onkar and Presmanes, Lionel and Thimont, Yohann and Tailhades, Philippe and Baco-Carles, Valérie and Bonningue, Corine and Thondiyanoor Pisharam, Sumangala and Barnabé, Antoine Ethanol and Hydrogen Gas-Sensing Properties of CuO–CuFe2O4 Nanostructured Thin Films. (2018) IEEE Sensors Journal, 18 (17). 6937-6945. ISSN 1530-437X

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Official URL: https://doi.org/10.1109/JSEN.2018.2849330

Abstract

Nanocrystalline CuO-CuFe 2 O 4 composite thin films were developed from CuFeO 2 ceramic target using a radio-frequency sputtering method followed by a thermal oxidation process. This fabrication process helps to develop porous sensing layers which are highly desirable for solid-state resistive gas sensors. Their sensing properties toward ethanol and hydrogen gas in dry air were examined at the operating temperatures ranging from 250 °C to 500 °C. The electrical transients during adsorption and desorption of the test gases were fitted with the Langmuir single site gas adsorption model. A composite thin film with a total thickness of 25 nm showed highest response (79%) toward hydrogen (500 ppm) at the operating temperature of 400 °C. The shortest response time (τ res ) was found to be ~60 and ~90 s for hydrogen and ethanol, respectively. The dependence of the response of the sensor on gas concentration (10-500 ppm) was also studied.

Item Type:Article
HAL Id:hal-02319546
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Picardie Jules Verne (FRANCE)
Other partners > Indian Institute of Technology Bombay - IIT Bombay (INDIA)
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Deposited On:18 Oct 2019 07:34

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