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Sensors 2014, 14(3), 5502-5515; doi:10.3390/s140305502
Article

Analytical Calculation of Sensing Parameters on Carbon Nanotube Based Gas Sensors

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Received: 8 January 2014; in revised form: 19 February 2014 / Accepted: 5 March 2014 / Published: 20 March 2014
(This article belongs to the Section Physical Sensors)
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Abstract: Carbon Nanotubes (CNTs) are generally nano-scale tubes comprising a network of carbon atoms in a cylindrical setting that compared with silicon counterparts present outstanding characteristics such as high mechanical strength, high sensing capability and large surface-to-volume ratio. These characteristics, in addition to the fact that CNTs experience changes in their electrical conductance when exposed to different gases, make them appropriate candidates for use in sensing/measuring applications such as gas detection devices. In this research, a model for a Field Effect Transistor (FET)-based structure has been developed as a platform for a gas detection sensor in which the CNT conductance change resulting from the chemical reaction between NH3 and CNT has been employed to model the sensing mechanism with proposed sensing parameters. The research implements the same FET-based structure as in the work of Peng et al. on nanotube-based NH3 gas detection. With respect to this conductance change, the I–V characteristic of the CNT is investigated. Finally, a comparative study shows satisfactory agreement between the proposed model and the experimental data from the mentioned research.
Keywords: carbon nanotubes (CNTs); NH3 gas sensor; I–V characteristic; field effect transistor (FET) carbon nanotubes (CNTs); NH3 gas sensor; I–V characteristic; field effect transistor (FET)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Akbari, E.; Buntat, Z.; Ahmad, M.H.; Enzevaee, A.; Yousof, R.; Iqbal, S.M.Z.; Ahmadi, M.T.; Sidik, M.A.B.; Karimi, H. Analytical Calculation of Sensing Parameters on Carbon Nanotube Based Gas Sensors. Sensors 2014, 14, 5502-5515.

AMA Style

Akbari E, Buntat Z, Ahmad MH, Enzevaee A, Yousof R, Iqbal SMZ, Ahmadi MT, Sidik MAB, Karimi H. Analytical Calculation of Sensing Parameters on Carbon Nanotube Based Gas Sensors. Sensors. 2014; 14(3):5502-5515.

Chicago/Turabian Style

Akbari, Elnaz; Buntat, Zolkafle; Ahmad, Mohd H.; Enzevaee, Aria; Yousof, Rubiyah; Iqbal, Syed M.Z.; Ahmadi, Mohammad T.; Sidik, Muhammad A.B.; Karimi, Hediyeh. 2014. "Analytical Calculation of Sensing Parameters on Carbon Nanotube Based Gas Sensors." Sensors 14, no. 3: 5502-5515.



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