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Sensors 2006, 6(5), 503-513;

CNT Sensors for Detecting Gases with Low Adsorption Energy by Ionization

Department of Electronic Engineering, Kyungnam University, Masan, Korea 631-701
Received: 29 March 2006 / Accepted: 4 May 2006 / Published: 5 May 2006
(This article belongs to the Special Issue Gas Sensors)
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In case of typical chemical gas sensors reacted by gas adsorption on surface of anactive layer, it is difficult to detect some gases which have low chemical adsorption energylike inert gases. In this paper, we report a gas sensor using carbon nanotube(CNT) array aselectron emitters for the purpose of detecting these gases. Specifically, sensors werefabricated with applications of glass patterning by a sand-blast process and of anodicbonding between glass and silicon to improve the compactness of the structure and thereliability in process. The proposed sensor, based on an electrical discharge theory known asPaschen's law, worked by figuring the changes of dark discharge current and initialbreakdown voltage depending on the concentration and the identity of gases. In this work,air and Ar gases were examined and discussed. View Full-Text
Keywords: carbon nanotubes; gas sensor; Paschen's law; ionization. carbon nanotubes; gas sensor; Paschen's law; ionization.
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Kim, S. CNT Sensors for Detecting Gases with Low Adsorption Energy by Ionization. Sensors 2006, 6, 503-513.

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