Microfluidic system for controlled displacement of a liquid

摘要

The device has a microchannel (10) i.e. microtube, partially filled with electrically conductive liquid (F1) and dielectric fluid (F2) e.g. silicone oil. The dielectric fluid is situated in downstream of the liquid in a longitudinal direction of the microchannel, and forms interfaces (I1) and another interface with the liquid and the fluid, respectively. A displacement unit displaces the liquid by electrowetting. A control system is provided with a capacitive measurement device to control displacement of the liquid based on a measured capacity value.