Bomb Detecting Device From Ink Jet Printers

A new inexpensive bomb detection device made from ink jet printers has been developed thanks to scientists from Georgia Tech. Techeater reports: 

"The amonia detecting sensor is constructed from silver nanoparticles, which are transformed into carbon nanotubes which attract ammonia (a component of explosives) in trace amounts. The nanoparticles are found in the ink, which is treated with ultrasonic waves during a process known as sonification. This process alters the viscosity, thus making the solution more homogeneous for greater effectiveness. Once the ink is set it then forms into nanotubes."