  Induced charge electrophoresis of a conducting cylinder suspended in a
non-conducting cylindrical pore is theoretically analyzed, and a micromotor is
proposed utilizing the cylinder rotation. The cylinder velocities are
analytically obtained in the Dirichlet and the Neumann boundary conditions of
the electric field on the cylindrical pore. The results show that the cylinder
not only translates but also rotates when it is eccentric with respect to the
cylindrical pore. The influences of a number of parameters on the cylinder
velocities are characterized in detail. The cylinder trajectories show that the
cylinder approaches and rests at certain positions within the cylindrical pore.
The proposed micromotor is capable of working under a heavy load with a high
rotational velocity when the eccentricity is large and the applied electric
field is strong.
