Microcantilever detector for explosives

Details Microcantilever detector for explosives Microcantilever detector for explosives

1998-03-31

1999-06-29

Brock, Michael

Measuring and testing

Explosive

Electric sensor

73 3514, 73 3102, 73 3105, 422 88, 310306, G01N 2520, G01N 3096, H02N 1000

Patent

active

059182636

ABSTRACT:
Methods and apparatus for detecting the presence of explosives by analyzing a vapor sample from the suspect vicinity utilize at least one microcantilever. Explosive gas molecules which have been adsorbed onto the microcantilever are subsequently heated to cause combustion. Heat, along with momentum transfer from combustion, causes bending and a transient resonance response of the microcantilever which may be detected by a laser diode which is focused on the microcantilever and a photodetector which detects deflection of the reflected laser beam caused by heat-induced deflection and resonance response of the microcantilever.

REFERENCES:
patent: 5445008 (1995-08-01), Wachter
patent: 5719324 (1998-02-01), Thundat
Kirk-Othmer Encyclopedia of Chemical Technology, Third Edition vol. 9, "Explosives and Propellants," pp. 561-605.
Journal of Energetic Materials, 1992, 814, "TNT Vapour Measurements Above Buried Landmines", pp. 292-307.

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