Abstract
In this study, ethanol gas sensors were fulfilled by utilizing the vertically aligned carbon nanotubes (CNTs). CNTs were synthesized by thermal chemical vapor deposition (CVD) at 700 °C under C2H2 atmosphere. From field-emission scanning electron microscope (FESEM), it was found that the average length and average diameter of the CNTs were about 4.52 μm and 45 nm, respectively. Further, carbon nanotube ethanol gas sensors were fabricated. Under 800 ppm ethanol vapor concentration and at room temperature, it was found that the sensitivity of the carbon nanotube ethanol gas sensor was 1.67 %.
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