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Author: search.filters.author.Cheirsirikul, S.Subject: search.filters.subject.Gas sensor

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    SiO2-Multiwalled carbon nanotube base gas sensor
    (2008-12-01)
    Jesen, S.
    ;
    Ruangphet, S.
    ;
    Cheirsirikul, S.
    The gas sensors are fabricated from multiwalled carbon nanotube-based. The electrode is constructed from platinum (Pt) and titanium (Ti). The gas sensors are used for detecting oxygen (O<inf>2</inf>), ethyl alcohol (C <inf>2</inf>H<inf>5</inf>OH) and ammonia (NH<inf>3</inf>) by measuring the charge of their electrical capacitance. In the ratio silicon dioxide (SiO <inf>2</inf>) : carbon nanotube (MWCNTs) = 100:1 by weight, the electrical capacitance of the film layer has changed at the highest rate. The response of oxygen with concentration of 10,000 ppm, 20% of ethyl alcohol and 20% of ammonia, it is found that the electrical capacitance of thin layer has change about 34%, 60% and 70%. © 2008 Trans Tech Publications, Switzerland.