Cantilevers detect trace amounts of explosives.(Bomb Sniffer)

Science News | August 23, 2003| | Copyright

Plastic explosives are difficult to detect because a bomb maker can mold them into concealable or inconspicuous objects. Consider shoe bombs. Existing technologies for sensing explosives are bulky and expensive. Now, however, researchers have fabricated a cheap sensor that can detect the barest whiff of these materials in the air and do so in a matter of seconds.

At the heart of the device is a V-shaped silicon cantilever, 180 micrometers long by 25 micrometers wide, Researchers already use such microcantilevers for detecting minute quantities of biological molecules ...

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