  Microscopic self-propelled swimmers capable of autonomous navigation through
complex environments provide appealing opportunities for localization, pick-up
and delivery of micro-and nanoscopic objects. Inspired by motile cells and
bacteria, man-made microswimmers have been fabricated, and their motion in
patterned surroundings has been experimentally studied. We propose to use
self-driven artificial microswimmers for separation of binary mixtures of
colloids. We revealed different regimes of separation including one with a
velocity inversion. Our finding could be of use for various biological and
medical applications.
