Gear and shaft operation

An example of a carbon nanotube gear and shaft operation with a powered gear. The gearshaft is a carbon nanaotube which may be just 1 to 10 nanometers in diameter. Benzyne molecules (as teeth) are attached to carbon nanotubes (shafts) to form gears that can operate at GHz frequencies.
  Category: Nanomanufacturing
  Source: NASA Ames Research Center