[1] J. Kong, N. R. Franklin, C. Zhou, M. G. Chapline, S. Peng, K. Cho, et al., “Nanotube molecular wires as chemical sensors,” Science, 2000, 287(5453): 622-625.
[2] X. B. Yan, Z. J. Han, Y. Yang, and B. K. Tay, “NO2 gas sensing with polyaniline nanofibers synthesized by a facile aqueous/organic interfacial polymerization,” Sensors and Actuators B: Chemical, 2007, 123(1): 107-113.
[3] B. Ding, M. Wang, J. Yu, and G. Sun, “Gas sensors based on electrospun nanofibers,” Sensors, 2009, 9(3): 1609-1624.
[4] S. Chopra, K. McGuire, N. Gothard, A. M. Rao and A. Pham, “Selective gas detection using a carbon nanotube sensor,” Applied Physics Letters, 2003, 83(11): 2280-2283.
[5] M. Y. Faizah, “Room temperature multi gas detection using carbon nanotubes,” European Journal of Scientific Research, 2009, 35(1): 142-149.
[6] S. Dhall, N. Jaggi, and R. Nathawat, “Functionalized multiwalled carbon nanotubes based Hydrogen gas sensor,” Sensors and Actuators: A Physical, 2013, 201(10): 321-327.
[7] I. Sayago, E. Terrado, E. Lafuente, M. C. Horrillo, W. K. Maser, A.M. Benito, et al., “Hydrogen sensors based on carbon nanotubes thin films,” Synthetic Metals, 2005, 148(1): 15-19.
[8] G. Al-zaidi, A. M. Suhail, and W. R. Al-azawi, “Palladium - doped ZnO thin film hydrogen gas sensor,” Applied Physics Research, 2011, 3(1): 89-99.
[9] L. A. Patil, A. R. Bari, M. D.Shinde, V. V. Deo, and D. P. Amalnerkar, “Synthesis of ZnO nanocrystalline powder from ultrasonic atomization technique, characterization, and its application in gas sensing,” IEEE Sensor Journal, 2011, 11(4): 939-946.
[10] F. Y. Wu and H. M. Cheng, “Structure and thermal expansion of multi-walled carbon nanotubes before and after high temperature treatment,” Journal of Physics D: Applied Physics, 2005, 38(24): 4302-4307.