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Metal pumps liquid uphill

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2 Author(s)
Vorobyev, A.Y. ; The Institute of Optics, University of Rochester, Rochester, New York 14627, USA ; Guo, Chunlei

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The behavior of liquids on a solid surface is determined by the surface wettability. In this work, by structuring metal surfaces with high-intensity femtosecond laser pulses, we engineer a unique surface pattern that dramatically modifies surface wetting properties. In a gravity-defying way, the treated metal surfaces make liquids sprint vertically uphill at an unprecedented speed of 1 cm/s. Furthermore, the surface structures we create here rapidly transport a significant amount of liquid against gravitation to an elevated point above the reservoir level, thus bringing this effect to potential real-life applications.

Published in:

Applied Physics Letters  (Volume:94 ,  Issue: 22 )

Date of Publication:

Jun 2009

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