Chiral particle separation by a non-chiral micro-lattice
  We conceived a model experiment for a continuous separation strategy of chiral molecules (enantiomers) without the need of any chiral selector structure or derivatization agents: Micro-particles that only differ by their chirality are shown to migrate along different directions when driven by a steady fluid flow through a square lattice of cylindrical posts. In accordance with our numerical predictions, the transport directions of the enantiomers depend very sensitively on the orientation of the lattice relatively to the fluid flow. 
Lukas Bogunovic, Marc Fliedner, Ralf Eichhorn, Sonja Wegener, Jan   Regtmeier, Dario Anselmetti, Peter Reimann
cond-mat.stat-mech cond-mat.soft