Abstract
A bi-directional microfluidic driving system was developed experimentally in this work. The bi-directional driving module combines two individual components for suction and exclusion. The individual components can be combined using a T-shape connection as well as in parallel. Modular devices with a parallel connection, presented herein, can provide flexible, predictable and linear control of bi-directional microfluid pumping. This work demonstrated the driving system and investigated the influences of the characteristics of the working liquids. The driving force, both suction and exclusion, for the liquid with the lower viscosity is stronger than those with the higher viscosity. Furthermore, the required flow rate at the suction component is quite large due to the strong surface tension of water.
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