Something interesting.....

[Seeker]

SniffEx, developed by Thomas Thundat, Lal Pinnaduwage, Tony Gehl, Vassil Boiadjiev and Eric Hawk of ORNL; David Hedden of the University of Tennessee; Eric Houser of the Naval Research Laboratory; Linda Deel of the Bureau of Alcohol, Tobacco, Firearms, and Explosives; and Richard Lareau of the Transportation Security Administration

SniffEx is a compact, low-cost explosive vapor sensor for detecting and locating a variety of explosives, including plastic-based explosives. A micromechanical transducer, no wider than a human hair and with a mass of only a few nanograms, allows only explosive molecules to chemically adsorb to a sensor that can identify the molecule. SniffEx is an improvement over other explosive detection products (such as gas chromatography/mass spectrometry and gas chromatography/surface acoustic wave devices) because of its sub-part-per-trillion sensitivity and high selectivity, direct vapor sensing, low power consumption (the instrument uses a 9-volt battery), less than one-second response time, stability, compact size, and low cost. SniffEx will have applications in counterterrorism, law enforcement, airport safety and humanitarian efforts such as landmine removal.

ORNL is managed by UT-Battelle for the Department of Energy.

Source: Oak Ridge National Laboratory

So, imagine if Sniffex detect gold or silver ?! Think .....
Look at the picture.In the left hand is sniffex.