title: 290 and 340 nm UV LED arrays for fluorescence detection from single airborne particles.
abstract: We demonstrate a compact system, incorporating a 32-element linear array of ultraviolet (290 nm and 340 nm) light-emitting diodes (LEDs) and a multi-anode photomultiplier tube, to the in-flight fluorescence detection of aerosolized particles, here containing the biological molecules tryptophan and NADH. This system illustrates substantial advances in the growth and fabrication of new semiconductor UV light emitting devices and an evolution in packaging details for LEDs tailored to the bio-aerosol warning problem. Optical engineering strategies are employed which take advantage of the size and versatility of light-emitting diodes to develop a truly compact fluorescence detector.
authors.forename: Kristina
authors.initials: K
authors.lastname: Davitt
authors.forename: Yoon-Kyu
authors.initials: YK
authors.lastname: Song
authors.forename: William
authors.initials: W
authors.lastname: Patterson Iii
authors.forename: Arto
authors.initials: A
authors.lastname: Nurmikko
authors.forename: Maria
authors.initials: M
authors.lastname: Gherasimova
authors.forename: Jung
authors.initials: J
authors.lastname: Han
authors.forename: Yong-Le
authors.initials: YL
authors.lastname: Pan
authors.forename: Richard
authors.initials: R
authors.lastname: Chang