Nano Archive

A novel conductive humidity sensor based on field ionization from carbon nanotubes

Huang, Jia-Rui and Li, Min-Qiang and Huang, Zhong-Ying and Liu, Jin-Huai (2007) A novel conductive humidity sensor based on field ionization from carbon nanotubes. Sensors and Actuators A: Physical, 133 (2). 467 - 471.

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Official URL: http://www.sciencedirect.com/science/article/B6THG...

Abstract

A novel, high efficiency detector for humidity is described, in which the multiwall nanotubes grown on the silicon substrates serve as anode and ITO film glass plate as cathode are separated and insulated by a glass insulator. Application of a positive bias to the multiwall nanotubes generates high electric field sufficient to field-ionize passing gas-phase atoms especially for water vapor. By monitoring the prebreakdown current, relative humidity can be determined. The sensitivity factor (I75.8%/I12%) is about 229.4. The recovery time from 53.4 to 6.8% RH for the humidity sensor is about 10 s.

Item Type:Article
Additional Information:Selected Papers from the 9th International Conference on Materials for Advanced Technologies - ICMAT 2005 SI, Selected Papers from the 9th International Conference on Materials for Advanced Technologies
Uncontrolled Keywords:Humidity sensor; Prebreakdown current; Ionization gas sensor; MWNTs
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Physical Science > Nano objects
Material Science > Nanostructured materials
ID Code:4756
Deposited By:SPI
Deposited On:08 May 2009 12:52
Last Modified:08 May 2009 12:52

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