Abstract
Behaviors of magnetic fluid have been widely studied due to the potential for developing biochips and other micro devices. In this study, magnetic films are deposited on the capillary, and the influences of capillary gap distance and magnetic film thickness on the magnetocapillary phenomenon are investigated. It is observed that in a wider gap a larger liquid height drop occurs due to the stronger magnetic attraction in magnetic fluids. Film thickness is found to affect the solid-liquid interfacial tension, and it significantly influences the behavior of magnetic fluid in a capillary.
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