Development and Characterization of a Multi-angle Dual Beam Thermal Lens Spectroscopy System

Development and Characterization of a Multi-angle Dual Beam Thermal Lens Spectroscopy System

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A dual beam multi-angle thermal lens spectroscopy system was successfully designed and developed for the future application of standoff detection of chemical species. Photoacoustic spectroscopy was used as a confirmatory technique during the initial setup to ensure the thermal lens system was analytically detecting chemical species accurately. Full spectra of fluorescein in addition to rhodamine B were obtained from the system collecting photoacoustic and thermal lens data concurrently with comparable results. Calibrations in both the collinear and crossed beam geometry were generated with crossed beam geometry having only a slight decrease in limits of detection but an overall improvement in spatial resolution over collinear geometry, which will be a main advantage of this system in comparison to currently available technologies for standoff detection.Photoacoustic spectroscopy (PAS) was chosen as a complimentary technique for the initial setup of the TLS system to ... With PAS, the heat causes the sample to expand and upon cooling the sample compresses creating a sound wave that is anbsp;...


Title:Development and Characterization of a Multi-angle Dual Beam Thermal Lens Spectroscopy System
Author: Tasha Noel Messenger
Publisher:ProQuest - 2008
ISBN-13:

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