Abstract
The study of electrically driven droplets has become an important aspect in microfluidics during the past decades. Yet a limited volume of research has been published regarding to the phenomenon when droplet, driven under the motion of electrophoresis, discharges with grounded electrode. On this account, this article firstly, based on our initial results, formulated one theoretical model to describe the relationship between droplets’ moving frequency and electric field. Thoroughly we comparing the experimental results with theoretical ones, can the deduction of droplet carrying large amount of charges during the motion of electrophoresis be ascertained with the conclusion that the larger the droplet is the more charges it can carry and the stronger the electric filed is the faster the droplet can move. After designing the circuit to capture the signal when discharge happens, this article successfully interpreted different kinds of signals in accords with various situations of droplet under varied DC-driven electric field. The article briefly comes up with two kinds of improvement of experimental set-up concerning different objectives in the last paragraph.