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Ethanol and Hydrogen Gas-Sensing Properties of CuO-CuFe2O4 Nanostructured Thin Films
De S., Venkataramani N., Prasad S., Dusane R.O., Presmanes L., Thimont Y., Tailhades P., Baco-Carles V., Bonningue C., Pisharam S.T.Show More
Published in Institute of Electrical and Electronics Engineers Inc.
Volume: 18
Issue: 17
Pages: 6937 - 6945
Nanocrystalline CuO-CuFe2O4 composite thin films were developed from CuFeO2 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 (τres) 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. © 2001-2012 IEEE.
About the journal
JournalData powered by TypesetIEEE Sensors Journal
PublisherData powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
Open AccessNo