Regular research article
19 Dec 2014
Regular research article | 19 Dec 2014
Room temperature carbon nanotube based sensor for carbon monoxide detection
A. Hannon1,2, Y. Lu1,3, J. Li1, and M. Meyyappan1
A. Hannon et al.
A. Hannon1,2, Y. Lu1,3, J. Li1, and M. Meyyappan1
- 1NASA Ames Research Center, Moffett Field, CA 94035, USA
- 2ERC at NASA Ames Research Center, Moffett Field, CA 94035, USA
- 3ELORET Corporation at NASA Ames Research Center, Moffett Field, CA 94035, USA
- 1NASA Ames Research Center, Moffett Field, CA 94035, USA
- 2ERC at NASA Ames Research Center, Moffett Field, CA 94035, USA
- 3ELORET Corporation at NASA Ames Research Center, Moffett Field, CA 94035, USA
Correspondence: M. Meyyappan (m.meyyappan@nasa.gov)
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Received: 24 Jul 2014 – Revised: 21 Oct 2014 – Accepted: 24 Nov 2014 – Published: 19 Dec 2014
Sulfonated single-walled carbon nanotubes have been used in an integrated electrode structure for the detection of carbon monoxide. The sensor responds to 0.5 ppm of CO in air at room temperature. All eight sensors with this material in a 32-sensor array showed good repeatability and reproducibility, with response and recovery times of about 10 s. Pristine nanotubes generally do not respond to carbon monoxide and the results here confirm sulfonated nanotubes to be a potential candidate for the construction of an electronic nose that requires at least a few materials for the selective detection of CO.
