Parametric Analysis of NO2 Gas Sensor Based on Carbon Nanotubes

Asama N. Naje; Russul R. Ibraheem; Fuad T. Ibrahim

doi:10.1007/s13320-016-0304-1

Photonic Sensors ›› 2015, Vol. 6 ›› Issue (2) : 153 -157. DOI: 10.1007/s13320-016-0304-1

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Parametric Analysis of NO₂ Gas Sensor Based on Carbon Nanotubes

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Abstract

Two types of carbon nanotubes [single walled nanotubes (SWCNTs) and multi walled carbon nanotubes (MWCNTs)] are deposited on porous silicon by the drop casting technique. Upon exposure to test gas mixing ratio 3% NO2, the sensitivity response results show that the SWCNTs’ sensitivity reaches to 79.8%, where MWCNTs’ is 59.6%. The study shows that sensitivity response of the films increases with an increase in the operating temperature up to 200° and 150° for MWCNTs and SWCNTs. The response and recovery time is about 19 s and 54 s at 200° for MWCNTs, respectively, and 20 s and 56 s at 150° for SWCNTs.

Keywords

SWCNTs / MWCNTs / NO₂ gas / sensitivity / response time

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Asama N. Naje, Russul R. Ibraheem, Fuad T. Ibrahim. Parametric Analysis of NO₂ Gas Sensor Based on Carbon Nanotubes. Photonic Sensors, 2015, 6(2): 153-157 DOI:10.1007/s13320-016-0304-1

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