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Measuring UV-excited fluorescence from individual airborne particles is a leading technique for fast, non-specific detection of biological threat aerosols. UV-LEDs, available at several wavelengths, enable cost reduction of these detectors while presenting additional design challenges.
A prototype instrument has been constructed to measure individual airborne particles based on their aerodynamic size and their intrinsic fluorescence at selected excitation and emission wavelength bands. The instrument combines features of an aerodynamic particle sizing device with capabilities similar to those of a liquid flow cytometer. The goal of the instrument is to provide real-time data indicative...
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