Project 5: Dielectrophoresis for Particle Subpopulation Analysis (Prof. Stuart Williams, ME)

Dielectrophoresis (DEP) is the movement of polarizable particles when subjected to a uniform electric field. The magnitude and direction of their translation is a function of the applied AC frequency and the  dielectric properties of the particle and fluid. For this project the participant work will fabricate a unique 3D dielectrophoresis device that incorporates extruded electrode features. Subsequent particle analysis  will be conducted via particle tracking velocimetry.

 

 

Figures: The manipulation of 3 mm polystyrene beads using dielectrophoresis with 20 mm interdigitated planar electrodes. (top) Negative (repulsive) dielectrophoresis and (bottom) attractive positive dielectrophoresis.