Materials Science and Engineering Commons^™

Liquid-Gas Surface Tension Voltage Dependence During Electrowetting On Dielectric Of 5-90 Nm Gold Nanofluids, Saeid Vafaei, Karthik Chinnathambi, Theodorian Borca-Tasciuc

Materials Science and Engineering Faculty Publications and Presentations

This article investigates the effective liquid-gas surface tension changes of water and 5-90nm gold nanofluids measured during electrowetting on dielectric experiments. The Young-Laplace equation for sessile droplets in air was solved to fit the experimental droplet shape and determine the effective liquid-gas surface tension at each applied voltage. A good agreement between experimental droplet shapes and the predictions was observed for all the liquids investigated in applied range of 0-30V. The measured liquid-gas effective surface tensions of water and gold nanofluid decreased with voltage. At a given voltage, the effective liquid-gas surface tension of gold nanofluids initially decreased as the …