Nano Archive

An electrothermal carbon nanotube gas sensor

Kawano, Takeshi and Chiamori, Heather C. and Suter, Marcel and Zhou, Qin and Sosnowchik, Brian D. and Lin, Liwei (2007) An electrothermal carbon nanotube gas sensor. NANO LETTERS, 7 (12). pp. 3686-3690.

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We show both gas pressure and species sensing capabilities based on the electrothermal effect of a multiwalled carbon nanotube (MWCNT). Upon exposure to gaseous environments, the resistance of a heated MWCNT is found to change following the conductive heat-transfer variances of gas molecules. To realize this mechanism, a suspended MWCNT is constructed by synthesis and assembly in localized chemical vapor deposition that is accomplished within seconds via real-time electrical feedback control. Vacuum pressure sensitivity and gas species differentiability are observed and analyzed. Such MWCNT electrothermal sensors are compact, fast and reversible in responses, and fully integratable with microelectronics.

Item Type:Article
Subjects:Analytical Science > Nanotechnology for sensing and actuating
ID Code:271
Deposited By:Lesley Tobin
Deposited On:21 Nov 2008 17:08
Last Modified:03 Feb 2009 11:48

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