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PhD Oral Preliminary Examination – Xinyuan Chong


Tuesday, July 19, 2016 2:00 PM - 4:00 PM

Carbon Dioxide Infrared Absorption Sensing Enhanced by Metal-Organic Framework
Carbon dioxide (CO2) is the most important greenhouse gas and the major product of combustion. Detecting CO2 is critical for many practical applications such as combustion control and pollution monitoring. Of all existing gas sensor technologies, infrared (IR) absorption is widely used as a simple and reliable technique for both detection and identification of hazardous and greenhouse gases. IR spectroscopy relies on the optical absorption of molecular vibration bands, which represent the signatures of various gas molecules. However, conventional sensing systems, such as Fourier transform infrared spectroscopy (FTIR), are bulky, expensive and unsuitable for portable sensing. To realize the on-site or portable sensing, we develop two types of miniaturized CO2 sensors based on optical fiber and plasmonic nanostructure. In addition, in order to enhance the sensitivity, we apply a new class of porous material --- metal-organic framework to selectively adsorb and concentrate CO2. The results show that both sensors have high sensitivity and potential for real field sensing.

Major Advisor: Alan Wang
Committee: Larry Cheng
Committee: Matthew Johnston
Committee: Chih-Hung Chang
GCR: William Warnes


Kelley Engineering Center (campus map)
2057
Nicole Thompson
1 541 737 3617
Nicole.Thompson at oregonstate.edu
Sch Elect Engr/Comp Sci
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