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Functionalized single wall carbon nanotube sensor in a perturbed microwave resonant cavity based toxin/pollutant gas pressure sensor

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1 Author(s)
Tooski, S.B. ; Department of Physics, Laboratory of Materials and Nanotechnology and Laboratory of Applied Physics, Amirkabir University of Technology (Tehran Polytechnic), Tehran P.O. Box 15875-4413, Iran

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The Vlasov and Maxwell’s equations are established and solved numerically to describe the effects of toxin/pollutant gas pressure and functionalized single wall carbon nanotube (SWCNT) sensor in a perturbed microwave resonant cavity. The dependence of the absorption coefficient on incident frequency, toxin/pollutant gas pressure, electron density, and collision frequency is presented. The numerical results illustrate that the resonant frequency shifts by a suitable amount for modest changes in toxin/pollutant gas pressure. It is also illustrated that high density and low collision of the blend of toxin/pollutant gas and SWCNT sensor in a microwave resonant cavity can be employed as broadband absorption of microwave and the detection of toxin/pollutant gas characteristics through adjustments of the amount of toxin/pollutant gas pressure and functionalized SCWNT sensor. The numerical results additionally illustrate that the microwave absorption spectra of the blend of toxin/pollutant gas and SWCNT sensor in a microwave resonant cavity are in good agreement with the available experimental data. The present method is, in principle, applicable to any kind of a single nanofiber, nanowire, silica gel, cotton fiber, and even various types of nanotubes.

Published in:

Journal of Applied Physics  (Volume:107 ,  Issue: 3 )