Noncontact optical detection of explosive particles via photodissociation followed by laser-induced fluorescence | Zendy

Charles M. Wynn | Zendy; S. T. Palmacci | Zendy; Roderick R. Kunz | Zendy; Matthew J. Aernecke | Zendy

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Noncontact optical detection of explosive particles via photodissociation followed by laser-induced fluorescence

Author(s) -

Charles M. Wynn,

S. T. Palmacci,

Roderick R. Kunz,

Matthew J. Aernecke

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.018671

Subject(s) - explosive material , materials science , photodissociation , fluorescence , optics , laser induced fluorescence , trinitrotoluene , laser , stray light , explosive detection , analytical chemistry (journal) , chemistry , photochemistry , physics , organic chemistry , chromatography

High-sensitivity (ng/cm²) optical detection of the explosive 2,4,6-trinitrotoluene (TNT) is demonstrated using photodissociation followed by laser-induced fluorescence (PD-LIF). Detection occurs rapidly, within 6 laser pulses (~7 ns each) at a range of 15 cm. Dropcasting is used to create calibrated samples covering a wide range of TNT concentrations; and a correspondence between fractional area covered by TNT and PD-LIF signal strength is observed. Dropcast data are compared to that of an actual fingerprint. These results demonstrate that PD-LIF could be a viable means of rapidly and remotely scanning surfaces for trace explosive residues.

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