28 October 2005 Separating hazardous aerosols from ambient aerosols: role of fluorescence-spectral determination, aerodynamic deflector and pulse aerodynamic localizer (PAL)
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Abstract
An aerosol deflection technique based on the single-shot UV-laser-induced fluorescence spectrum from a flowing particle is presented as a possible front-end bio-aerosol/hazardous-aerosol sensor/identifier. Cued by the fluorescence spectra, individual flowing bio-aerosol particles (1-10 um in diameter) have been successfully deflected from a stream of ambient aerosols. The electronics needed to compare the fluorescence spectrum of a particular particle with that of a pre-determined fluorescence spectrum are presented in some detail. The deflected particles, with and without going through a funnel for pulse aerodynamic localization (PAL), were collected onto a substrate for further analyses. To demonstrate how hazardous materials can be deflected, TbCl3⋅6H2O (a stimulant material for some chemical forms of Uranium Oxide) aerosol particles (2 μm in diameter) mixed with Arizona road dust was separated and deflected with our system.
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Yong-Le Pan, Yong-Le Pan, Patrick J. Cobler, Patrick J. Cobler, Scott A. Rhodes, Scott A. Rhodes, Justin Halverson, Justin Halverson, Richard K. Chang, Richard K. Chang, } "Separating hazardous aerosols from ambient aerosols: role of fluorescence-spectral determination, aerodynamic deflector and pulse aerodynamic localizer (PAL)", Proc. SPIE 5990, Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II, 59900Y (28 October 2005); doi: 10.1117/12.634335; https://doi.org/10.1117/12.634335
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