Diffusion of Chiral Janus Particles in a Sinusoidal Channel
  We investigate the transport diffusivity of artificial microswimmers, a.k.a. Janus particles, moving in a sinusoidal channel in the absence of external biases. Their diffusion constant turns out to be quite sensitive to the self-propulsion mechanism and the geometry of the channel compartments. Our analysis thus suggests how to best control the diffusion of active Brownian motion in confined geometries. 
Xue Ao, Pulak Kumar Ghosh, Yunyun Li, Gerhard Schmid, Peter H\"anggi,   Fabio Marchesoni
cond-mat.soft physics.bio-ph