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Nano-cone textures generate extremely 'robust' water-repellent surfaces
Date:10/21/2013

at speeds up to 10 meters per second, which is faster than the speed of a falling raindrop."

Next steps

The team is working on extending this technique to other materials, including glass and plastics, and on fabricating surfaces that are also oil-repellent by further tweaking the feature shape.

They are also studying the resistance of different nanotextures to water penetration using intense beams of x-rays available at Brookhaven's National Synchrotron Light Source (NSLS). "The goal is to understand quantitatively how the forced liquid infiltration depends on the texture size and geometry. This will assist the design of even more resilient superhydrophobic coatings," Checco said.

The nanopatterning technique used in this study also enables the design of a wide variety of materials with different texturing-and therefore different water-repelling properties-on different parts of a single surface. This approach could be used, for example, to fabricate nanoscale channels with self-cleaning and low fluid friction properties for diagnostic applications such sensing the presence of DNA, proteins, or biotoxins.

"This result is an excellent example of the type of project that can be done collaboratively with the DOE's Nanoscale Science Research Centers," said Black. "Previously, we have been pursuing similar structures for an entirely different scientific purpose. We are happy to work with Antonio through the CFN User program to help him accomplish his research goals."


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Contact: Karen McNulty Walsh
kmcnulty@bnl.gov
631-344-8350
DOE/Brookhaven National Laboratory
Source:Eurekalert  

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