Smartdust is a hypothetical system of many tiny microelectromechanical systems (MEMS) such as sensors, robots, or other devices, that can detectfor example, light, temperature, vibration, magnetism, or chemicals.
They are usually operate on a computer network wirelessly and are distributed over some area to perform tasks, usually sensing through radio-frequency identification. Without an antenna of much greater size the range of tiny smart dust communication devices is measured in a few millimeters and they may be vulnerable to electromagnetic disablement and destruction by microwave exposure.
http://en.wikipedia.org/wiki/Smartdust
The smartdust concept was introduced, developed, and funded by DARPA due to the potential military applications of the technology.[3] The concept was later expanded upon by Kristofer S. J. Pister in 2001.[4] A recent review discusses various techniques to take smartdust in sensor networks beyond millimeter dimensions to the micrometre level.[citation needed]
The Ultra-Fast Systems component of the Nanoelectronics Research Centre at the University of Glasgow is a founding member of a large international consortium which is developing a related concept: smart specks
In Chemtrails but with nanotech
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