Negative charge dielectrophoresis by using different radius of electrodes for biological particles

Dielectrophoresis (DEP) is a force that is exerted on a dielectric field particle when it is subjected to a non-uniform electric field. There are many applications of DEP and one of them is the separation of particles. In this paper, there are four electrodes that are made of the same materials and same thickness but varying radius curvatures (0μm, 5μm, 10μm and 15μm) are used to identify the direction, maximum value and also the distribution of electric field. The electric field was analysed at z-axis by using COMSOL Multiphysics software for biological particles in an artificial kidney. Results showed that the electrode with 0μm radius curve has the highest electric field, 5.011×106 V/m and the 15μm radius curve electrode has the lowest electric field, 0.889×106 V/m. However, based on the simulation results, electrodes with 15 radiuses curve shows the electric fields are much more uniform as compared to the other three. Thus, the 15μm radius-curved electrodes are chosen for negative charge DEP in an artificial kidney.