Patent ID: 8524064

Claim:
A dielectrophoresis apparatus for separating particles from a sample fluid containing the particles by directing the particles into a recovery fluid, comprising: an apparatus body; a dielectrophoresis channel in said apparatus body, said dielectrophoresis channel having a central axis, a bottom, a top above said bottom, a first side, and a second side; a recovery fluid channel connected to said dielectrophoresis channel that directs the recovery fluid into said dielectrophoresis channel, along said central axis of said dielectrophoresis channel, and out of said dielectrophoresis channel; a sample fluid channel connected to said dielectrophoresis channel that directs the sample fluid into said dielectrophoresis channel adjacent the recovery fluid and along said central axis of said dielectrophoresis channel; a first glass, silicon, or plastic mesa projecting into said dielectrophoresis channel from said bottom and extending from said first side across said dielectrophoresis channel to said second side, said first glass, silicon, or plastic mesa extending perpendicular to said central axis of said dielectrophoresis channel but at an angle to said central axis of said dielectrophoresis channel; a first electrode extending along said first glass, silicon, or plastic mesa; a second glass, silicon, or plastic mesa projecting into said dielectrophoresis channel from said bottom and extending from said first side across said dielectrophoresis channel to said second side, said second glass, silicon, or plastic mesa extending perpendicular to said central axis of said dielectrophoresis channel but at an angle to said central axis of said dielectrophoresis channel; a second electrode extending along said second glass, silicon, or plastic mesa; a first space between said first electrode and said top of said dielectrophoresis channel; a second space between said second electrode and said top of said dielectrophoresis channel; and a gap between said first electrode and said second electrode; wherein the sample fluid containing the particles is directed through said first space and said second space and the particles are drawn from the sample fluid into the recovery fluid.