  Using numerical simulations, we study how a solution of small active disks,
acting as depletants, induces effective interactions on large passive colloids.
Specifically, we analyze how the range, strength, and sign of these
interactions are crucially dependent on the shape of the colloids. Our findings
indicate that while colloidal rods experience a long-ranged predominantly
attractive interaction, colloidal disks feel a purely repulsive force that is
short-ranged in nature and grows in strength with the size ratio between the
colloids and active depletants. For colloidal rods, simple scaling arguments
are proposed to characterize the strength of these induced interactions.
