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Sensing Properties of CNT hybrid MOS-based Sensors

Published online by Cambridge University Press:  01 February 2011

Wei-Jen Liou ,
Tsung-Yeh Yang ,
Kuang-Nan Lin ,
Ching-Hong Yang  and
Hong-Ming Lin
Wei-Jen Liou
Affiliation:
Department of Materials Engineering, Tatung University, Taipei 104, Taiwan, R.O.C.
Tsung-Yeh Yang
Affiliation:
Department of Materials Engineering, Tatung University, Taipei 104, Taiwan, R.O.C.
Kuang-Nan Lin
Affiliation:
Department of Materials Engineering, Tatung University, Taipei 104, Taiwan, R.O.C.
Ching-Hong Yang
Affiliation:
Department of Materials Engineering, Tatung University, Taipei 104, Taiwan, R.O.C.
Hong-Ming Lin
Affiliation:
Department of Materials Engineering, Tatung University, Taipei 104, Taiwan, R.O.C.
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Abstract

The carbon nanotubes provide large surface that can enhance the gas adsorption properties and increase the conductivity at a lower temperature for gas sensing. The gas sensing properties of the hybrid TiO2/CNTs material are examined in this study. The sol-gel technique is used to prepare a thin layer of nano-TiO2 coated on CNTs. The structure of TiO2/CNTs hybrid materials is identified by X-ray diffraction (XRD) and Raman spectrum. The granules and surface morphology are analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrical properties of the hybrid TiO2/CNTs indicate that the operation temperature can be lowered to ambient temperature and this will enhance the gas sensitivity for detecting CO gas. The n-type or p-type behavior of hybrid TiO2/CNTs can be controlled by the coating thickness of hybrid TiO2. According to the image results, the mechanisms of the n-type and p-type behavior of hybrid TiO2/CNTs system are proposed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 828: Symposium A – Semiconductor Materials for Sensing , 2004 , A2.6
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

[1] Paz, I., Luo, Z., Radenberg, L., Haller, A., J. Materials Research, 10, 2842 (1995).Google Scholar
[2] Traversa, E., Gnappi, G., Montenero, A., Gusmano, G., Sensors and Acruators, B 31, 59 (1996).Google Scholar
[3] Iijima, S., Nature, 354, 56 (1991).Google Scholar
[4] Chambers, A. et al., J. Physical Chemistry, B 102, 4253 (1998).Google Scholar
[5] Dillon, A. C. et al., Nature 386, 377 (1997).Google Scholar
[6] Cheng, H. M., Yang, Q. H., and Liu, C.: Carbon, 39, 1447 (2001).Google Scholar
[7[ Lee, S. M., Park, K. S., Choi, Y. C., Park, Y. S., Bok, J. M., Bae, D. J., Nahm, K. S., Choi, Y. G., Yu, C., Kim, N. G., Frauenheim, T., and Lee, Y. H., Synthetic Metals, 113, 209 (2000).Google Scholar
[8] Fujiwara, A., Ishii, K., Suematsu, H., Kataura, H., Maniwa, Y., Suzuki, S., and Achiba, Y.: Chemical Physics Letters, 336, 205 (2001).Google Scholar
[9] Talapatra, S., Zambano, A. Z., Weber, S. E., and Migone, A. D., Physical Review Letters, 85, 138 (2000).Google Scholar
[10] Kuznetsova, A., Mawhinney, D. B., Naumenko, V., Yates, John T. Jr, Liu, J., and Smalley, R. E.: Chemical Physics Letters, 321, 292 (2000).Google Scholar
[11] Collins, P. G., Bradley, K., Ishigami, M., and Zettl, A., Science, 287, 1801 (2000).Google Scholar
[12] Sumanasekera, G. U., Adu, C. K.W., Fang, S., and Eklund, P. C., Physical Review Letters, 85, 1096 (2000).Google Scholar
[13] Wei, Bee-Yu, Hsu, Ming-Chih, Yang, Yu-Sheng, Chien, Shu-Hua, Lin, Hong-Ming, Materials Chemistry and Physics, 81, 126 (2003).Google Scholar
[14] Wei, B. Y., Lin, H. M., Lai, H. J., Yang, Y. S., and Chien, S. H., Reviews on Advanced Materials Science, 5, 306 (2003).Google Scholar
[15] Tsai, Meng-Hung, Lin, Hong-Ming, Tsai, Wen-Li, Hwu, Yeukuang, Reviews on Advanced Materials Science, 5, 302 (2003).Google Scholar
[16] Kong, J., Franklin, N. R., Zhou, C., Chapline, M. G., Peng, S., Cho, K., and Dai, H., Science, 287, 622 (2000).Google Scholar
[179] Wei, Bee-Yu, Lin, Ching-San, Lin, Hong-Ming, Sensors and Materials, 15(4), 177 (2003).Google Scholar
[18] Wei, Bee-Yu, Hsu, Ming-Chih, Su, Pi-Guey, Lin, Hong-Ming, Wu, Ren-Jang, Lai, Hong-Jen, Sensors and Actuators B , 101, 81 (2004).Google Scholar
[19] Wu, Chung-Yi, Lin, Hong-Ming, “Detection of NO2 and CO Gases by CNTs/WO3-Based Sensors”, Poster 4.B3, 7th International Conference on Nanostructured Materials, June 20–24, 2004, Wiesbaden, Germany.Google Scholar
[20] Collins, P.G., Bradley, K., Ishigami, M., Zettl, A., Science, 287, 1801 (2000).Google Scholar
[21] Kong, J., Franklin, N.R., Zhou, C., Chapline, M.G., Peng, S., Cho, K., Dai, H., Science, 287, 622 (2000).Google Scholar
[22] Martel, R., Schmidt, T., Shea, H.R., Hertel, T., Avouris, Ph., Applied Physics Letters, 73, 2447 (1998).Google Scholar