In microfluidic field, how to capture, manipulate and separate micro-particles suspended in liquid media has very important applications. Up to now, only seldom works focused on how to trap two particles with different sizes. In order to achieve this goal, a dielectrophoretic microfluidic chip was designed. The shape of electrode and flow channel was optimized; the electric field and the flow field were simulated. At last, the chip was fabricated to verify the design. The results show that the chip is able to realize the function of pairing two particles with different sizes.

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Soochow University; Xi′an University of Architecture ＆ Technology; Harbin Institute of Technology