Growth confinement techniques for multi walled carbon nanotubes on Au/SiO2 surfaces was studied and incorporated into a gas sensor design. A device framework was conceived and a sensor was built to achieve this structure. The fabrication results were analyzed using scanning electron microscopy which confirmed the achievement of highly site-selective growth of carbon nanotubes, exclusively between the interdigitated electrodes. The sensor was then evaluated for its capacitance and conductance response when exposed to NO2 gas. Variation in sensitivities with frequency and flow rate were analyzed. A mathematical model was derived for such a device structure and the predictions of the model were compared with experimental results.
| Identifer | oai:union.ndltd.org:uky.edu/oai:uknowledge.uky.edu:gradschool_theses-1091 |
| Date | 01 January 2011 |
| Creators | Durgamahanty, Srikanth |
| Publisher | UKnowledge |
| Source Sets | University of Kentucky |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | University of Kentucky Master's Theses |
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