A theoretical analysis of the resolution due to diffusion and size-dispersion of particles in deterministic lateral displacement devices
arXiv:0711.0347 · doi:10.1088/0960-1317/18/7/075030
Abstract
We present a model including diffusion and particle-size dispersion for separation of particles in deterministic lateral displacement devices also known as bumper arrays. We determine the upper critical diameter for diffusion-dominated motion and the lower critical diameter for pure convection-induced displacement. Our model explains the systematic deviation, observed for small particles in several experiments, from the critical diameter for separation given by simple laminar flow considerations.
5 pages, 3 eps figures, revtex4