Abstract
The climbing phenomenon of fluid driven by surface acoustic wave was discovered, and its climbing characteristic was experimentally studied. A steel ball was fixed on an YX-128° LiNbO3 piezoelectric substrate by help of polydimethylsiloxane at the bottom of the steel ball. The fluid was forced by the acoustic streaming force and the resistance from the steel ball, leading to climbing the steel ball. The climbing characteristic was investigated using red ink solution. Results show that 3 µL red ink solution can climb the top of the steel ball with 2 mm diameter at 28.7 dBm electric signal power.
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