  We report a versatile method for executing controllable high-speed rotation
of nanowires by AC voltages applied to multiple electrodes. The rotation of the
nanowires can be instantly switched on or off with precisely controlled
rotation speed (to at least 1800 rpm), definite chirality, and total angle of
rotation. We have determined the torque due to the fluidic drag force on
nanowire of different lengths. We also demonstrate a micromotor using a
rotating nanowires driving a dust particle into circular motion. This method
has been used to rotate magnetic and nonmagnetic nanowires as well as carbon
nanotubes.
