In order to create more sensitive and accurate gas sensors, we have
studied the interactions of gas mixtures on metal oxide nanoparticle
decorated porous silicon interfaces. The nanoparticles control the
magnitude and direction of electron transduction from the interaction of
analyte gases to an extrinsic porous silicon semiconductor. These
interactions can be predicted by the Inverse Hard Soft Acid Base (IHSAB)
principle. Moreover, the metal oxide nanoparticles can be functionalized
with nitrogen and sulfur, modifying the oxide’s band structure. These
modifications are demonstrated to change analyte interactions in line
with the IHSAB concept and allow for light enhanced sensors. Further we
looked at how the analyte gases interact with other analyte gases on the
surface of these sensors. Studying these systems does two things, first
the research will lead to cheaper, more accurate gas sensors, and second
it helps explore the role of nanoparticles in modifying the interactions
between bulk materials (porous silicon) and molecules (analyte gases).
| Identifer | oai:union.ndltd.org:GATECH/oai:smartech.gatech.edu:1853/53877 |
| Date | 21 September 2015 |
| Creators | Laminack, William I. |
| Contributors | Gole, James L. |
| Publisher | Georgia Institute of Technology |
| Source Sets | Georgia Tech Electronic Thesis and Dissertation Archive |
| Language | en_US |
| Detected Language | English |
| Type | Dissertation |
| Format | application/pdf |
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