Novel dielectrophoretic filtration methods and designs

Benjamin Y. Park; Alan Paradiso; Matt Kawabe; Marc J. Madou

doi:10.1117/12.658884

31 March 2006 Novel dielectrophoretic filtration methods and designs

Benjamin Y. Park, Alan Paradiso, Matt Kawabe, Marc J. Madou

Proceedings Volume 6172, Smart Structures and Materials 2006: Smart Electronics, MEMS, BioMEMS, and Nanotechnology; 61720C (2006) https://doi.org/10.1117/12.658884
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

A dielectrophoretic oil filter concept utilizing three-dimensional electrode geometries for electric and flow field shaping is introduced. Dielectrophoretic separation systems that incorporate planar microelectrodes cannot effectively filter large amounts of fluids because the dielectrophoretic force rapidly decays as the distance from the electrodes increases. 3D electrode designs for flow-through dielectrophoretic separation/concentration/filtration systems are advantageous because 1) The 3D electrodes extend the electric field within the fluid. 2) The electrodes can be designed so that the velocity field as well as the electric field is shaped for maximum efficiency. and 3) Filtration of particles that are too small to be physically filtered is possible. Three novel electrode designs that are not based on 2D electrode designs are introduced. Initial experimental results from particle count analysis that suggest that a reduction of up to 90% of particulate contaminants could be achieved are presented (It is important to note that the standard deviation was large due to the small number of particles within view and the uneven distribution of particles within the oil).

Citation Download Citation

Benjamin Y. Park, Alan Paradiso, Matt Kawabe, and Marc J. Madou "Novel dielectrophoretic filtration methods and designs", Proc. SPIE 6172, Smart Structures and Materials 2006: Smart Electronics, MEMS, BioMEMS, and Nanotechnology, 61720C (31 March 2006); https://doi.org/10.1117/12.658884

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