Patent ID: 7204923
Filing Date: 2007-04-17
Classification: B03C,G01N

Abstract:
1. A method for spatial separation of particles, comprising: providing a fluid flow channel having first and second ends, a fluid inlet port at the first end, a filtered output port and a concentrate output port at the second end in fluid communication with the flow channel, and electrodes in electric communication with the inlet and outlet ports, wherein the flow channel is disposed on a substrate, and wherein the flow channel has a plurality of insulating posts disposed therein between the inlet and output ports; admitting a fluid containing a suspension of particles to the flow channel through the fluid inlet port; applying an electric field to the suspension to effect continuous flow dielectrophoretic separation of the particles; and extracting the separated particles from the concentrate output port, wherein the plurality of insulating posts are arranged in an array having a primary principal axis, and wherein the primary principal axis of the array is tilted relative to the applied electric field.