Abstract
Fluid-solid interfacial friction and adhesion behaviors play critical roles in microfluidic control systems. In this paper, the responses of fluid-solid interfacial friction force and adhesion force to voltage were studied under electrowetting conditions. Results showed that the fluid-solid interfacial friction force increased two orders of magnitude by voltage in the electrowetting transition region. The responses of friction force and adhesion force to the voltage were almost instantaneous on the time scale. It is indicated that the friction force and adhesion force can be manipulated over a wide range in real-time by voltage. The findings are helpful to provide a method for manipulating the fluid-solid interfacial friction force and adhesion force in real-time using voltage.
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