Selective gas detection using a carbon nanotube sensor

Applied Physics Letters

Volumn 83, Issue 11, 2003, Pages 2280-2282

  Chopra, S ^a   McGuire, K ^a   Gothard, N ^a   Rao, A M ^a   Pham, A ^b  

^a CLEMSON UNIVERSITY   (United States)

^b University of California   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRIC ARCS; ELECTRIC CONDUCTIVITY; GAS DETECTORS; NATURAL FREQUENCIES; SENSORS;

NONPOLAR GASES;

CARBON NANOTUBES;

EID: 0142089966     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1610251     Document Type: Article

References (16)

1. D. Schuetzle and R. Hammerle, Fundamentals and Applications of Chemical Sensors (American Chemical Society, Washington DC, 1986).
2. M. Cinke, J. Li, B. Chen, A. Cassell, L. Delzeit, J. Han, and M. Meyyappan, Chem. Phys. Lett. 365, 69 (2002).
3. C. K. W. Adu, G. U. Sumanasekera, B. K. Pradhan, H. E. Romero, and P. C. Eklund, Chem. Phys. Lett. 337, 31 (2001).
4. J. Kong, N. R. Franklin, C. Zhou, M. G. Chapline, S. Peng, K. Cho, and H. Dai, Science 287, 622 (2000).
5. O. K. Varghese, P. D. Kichambre, D. Gong, K. G. Ong, E. C. Dickey, and C. A. Grimes, Sens. Actuators B 81, 32 (2001).
6. G. U. Sumanasekera, C. K. W. Adu, S. Fang, and P. C. Eklund, Phys. Rev. Lett. 85, 1096 (2000).
7. T. W. Savage, M. S. thesis, Clemson University, Clemson, South Carolina, 2002.
8. S. Chopra, A. Pham, J. Gaillard, A. Parker, and A. M. Rao, Appl. Phys. Lett. 80, 4632 (2002).
9. K. G. Ong, K. Zeng, and C. A. Grimes, IEEE Sensors J. 2, 82 (2002).
10. R. E. Collin, Foundations of Microwave Engineering (McGraw-Hill, New York, 1992).
11. In preliminary experiments for the detection of organic solvents using this configuration, we have seen much better sensitivity in the ppb range. This work is still in progress.
12. K. J. Button, Infrared and Millimeter Waves (Academic, New York, 1983).
13. N. E. Hill, Dielectric Properties and Molecular Behavior (Van-Nostrand Reinhold, New York, 1969).
14. C. P. Smyth, Dielectric Behavior and Structure (McGraw-Hill, New York, 1955).
15. J. Zhao, A. Buldum, J. Han, and J. P. Lu, Nanotechnology 13, 195 (2002).
16. It should be noted that the soot and metal particles present in the as-prepared sample would affect the initial value of the resonant frequency, (dielectric constant). However, since the same sample is used in successive measurements, the presence of soot/particles does not affect the magnitude of resonant frequency shift.