Metals Absorb Light, Repel Water after Laser Conditioning

January 20, 2015 4:38 PM

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ROCHESTER, N.Y., JAN. 20, 2015 — A new laser micropatterning technique turns normally shiny metals black and makes them so hydrophobic that water droplets bounce off.

University of Rochester researchers carved microgrooves into sheets of platinum, titanium and brass using an 800-nm laser firing 65-fs pulses. Nanostructures spontaneously form on top of the grooves, giving the metals high optical absorption properties, as well as superhydrophobicity.

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