  We study the dynamics of a chemical nanoswimmer in a ratchet potential, which
is periodically rocked in the transverse direction. As a result of the
mechanochemical coupling, the self-propulsion velocity becomes force-dependent
and particle trajectories are rectified in the direction of the ratchet
modulation. The magnitude and direction of the nanoswimmer mean velocity depend
upon both the rocking amplitude and the frequency. Remarkably, for frequencies
larger than the inverse correlation time of the rotational diffusion, the
velocity exhibits oscillatory behaviour as a function of the amplitude and the
frequency with multiple reversals of the sign. These findings suggest that
mechanochemical coupling can be utilized for controlling the motion of
chemically active particles at the nanoscale.
