Functionalized Nanomaterials to Sense Toxins/Pollutant Gases Using Perturbed Microwave Resonant Cavities
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This chapter provides an overview of the techniques and methods involving electromagnetic resonators to study the interactions of gas molecules with nanomaterials substrates. A resonant cavity operating in TE011 mode was employed by the author(s) to characterize the nature of interactions of a range of weakly polar to nonpolar gas molecules with carbon nanotubes loaded in the cavity. Microwave resonant cavities are special electromagnetic resonators that can have a very high quality factor, which enhances the sensitivity of the apparatus as compared to standard electrical tank circuits. By measuring shifts in the resonant frequency of these circuits and by calculating the pressure broadening of the resonant peaks, the technique developed offers a highly effective means to quantify the amount of foreign agents perturbing these resonant cylinders. By functionalizing the nanomaterials with specific antibodies and loading them as wicks in these cylinders, the technique can be engineered into a very sensitive and unique chemical and biological sensor prototype.
KeywordsCarbon nanotubes chemical and biological sensors microwave resonance resonant cavities
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- Anand A (2007) studying interactions of gas molecules with nanomaterials loaded in a microwave resonant cavity, Ph.D. dissertation, University of North Texas, Texas, USA.Google Scholar
- Harvey AF (1963) Microwave engineering. Academic Press, London, Ch. 5, p. 196. Google Scholar
- Hong KH (1974) Microwave Properties of Liquids and Solids Using a Resonant Microwave Cavity as a Probe, Ph.D. dissertation, University of North Texas, Texas, USA.Google Scholar
- Microwave network analyzer purchased through Naval Grant number - ONR-N00013-03-0880 Montgomery CG (1947) Technique of microwave measurement. McGraw-Hill, Cleveland, p. 294.Google Scholar
- Radar Circuit Analysis, U.S. Air Force radar manual. Washington, 1950, Ch. 10.Google Scholar
- Slater JC (1941) Microwave electronics. Rev. Mod. Phys. 441.Google Scholar
- Zeke Insepov, Dieter Wolf, and Ahmed Hassanein (2006) Nanopumping using carbon nanotubes. Nanoletters 6 (9): 1893.Google Scholar
- Zhao, J. (2001) Gas molecules adsorption on carbon nanotubes. Mat. Res. Soc. Symp. Proc. 633: A13.48.1.Google Scholar