Abstract
Droplet transport technology is a new technology which doesn’t need channels to control fluids. It has some advantages, such as simple fabrication, minute volume controlling, easy mix, low cost, and so on. Its device satisfied two physical phenomena which affects fluids: electrowetting on dielectrics (EWOD), and dielectrophoretic effect (DEP). We design an experiment to identify the phenomenon which makes the droplet moving. By using Pellat’s two parallel electrodes experiment model, our experiment shows when we used DC power, the height of liquid-air interface is the same as expectancy of EWOD phenomenon. T. B. Jones’ group discovered when used AC power, frequency would influence the height of liquid-air interface. To analyze the circuit, we know how frequency effect the distribution of voltage, and partial voltage affect physical phenomena and the force. At last, we discuss the influences of some important parameters to design a better microfluidic transport device.