NANOTECHNOLOGY? This is close:

“It’s the smallest synthetic motor that’s ever been made,” Alexander Zettl of the University of California at Berkeley said in a statement released last week. “Nature is still a little bit ahead of us — there are biological motors that are equal or slightly smaller in size — but we are catching up.”

The device measures about 500 nanometers across, which is about 300 times smaller than the diameter of a human hair. The rotor is between 100 and 300 nanometers long, while the carbon shaft is just a few atoms across.

Interesting.