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Watch Droplets Bounce Off Amazing New Water-Repellent Metal

Jan 22, 2015

Scientists have used lasers to create a water-repelling metal surface that acts like a trampoline for water droplets.

Researchers at the University of Rochester, who published an article in the Journal of Applied Physics this week, used lasers to etch micro- and nanoscale structures into a metal surface that make it almost completely water-repellent, or hydrophobic.

The material could have a transformative impact on everything from aviation to sanitation, Chunlei Guo, a professor of optics and co-author of the study said in a press release and accompanying explanatory video. Airplane surfaces, for example, could use the material to repel water and prevent surface freezing.

The metal surface is more effective than traditional chemical-based surfaces like Teflon and, because it’s a structural alteration, doesn't wear off.

“The material is so strongly water-repellent, the water actually gets bounced off,” Guo said in a statement. “Then it lands on the surface again, gets bounced off again, and then it will just roll off from the surface.”

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