Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3117237
Keywords
laser beam effects; platinum; surface structure; surface treatment; wetting
Categories
Funding
- U.S. Air Force Office of Scientific Research
- National Science Foundation
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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.
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