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Dielectrophoretic columnar focusing device

United States Patent

May 11, 2010
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A dielectrophoretic columnar focusing device uses interdigitated microelectrodes to provide a spatially non-uniform electric field in a fluid that generates a dipole within particles in the fluid. The electric field causes the particles to either be attracted to or repelled from regions where the electric field gradient is large, depending on whether the particles are more or less polarizable than the fluid. The particles can thereby be forced into well defined stable paths along the interdigitated microelectrodes. The device can be used for flow cytometry, particle control, and other process applications, including cell counting or other types of particle counting, and for separations in material control.
James; Conrad D. (Albuquerque, NM), Galambos; Paul C. (Albuquerque, NM), Derzon; Mark S. (Tijeras, NM)
Sandia Corporation (Albuquerque, NM)
11/ 401,714
April 11, 2006
STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under contract no. DEAC04-94AL85000 awarded by the U.S. Department of Energy to Sandia Corporation. The Government has certain rights in the invention.