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Investigation of optimal separation condition in negative dielectrophoresis force based particle sorting platform

J.H. Lee, Y.H. Kim, Y.H. Kim, B.K. Kim
Korea Aerospace University, KR

Keywords: dielectrophoresis, hydrodynamic force, gravitation, sorting platform

Abstract:

we investigate an optimal separation condition regarding the gravitation, the hydrodynamic force and the n-DEP force acting on particles in the sorting platform since contribution of each force is the main parameter to determine SE. The hydrodynamic force depends on the size of particle and fluid flow rate. The n-DEP force, on the other hand, depends on the size of particle and applied signal as well as the dielectric material properties of a particle. Accordingly, based on the simulation and experimental studies, we investigated the optimal separation condition by comparing the n-DEP force with the hydrodynamic force. Conclusively, the 10 um particles are most effectively deflected under the condition of low voltage (5Vp-p with 30MHz) and low fluid flow rate of 5 uL/min as drain condition of water pool.
 
 
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