Image courtesy of Xi Yao, Harvard University.
When stretched, the new material confers the ability to reversibly “pin” droplets of water, stopping them in their tracks.
If you dig action-packed films, you’ll love this one!
This is Sandra Tsing Loh with the Loh Down on Science.
Materials scientists from Harvard University have created a seemingly magical membrane. Why magical? You can change how transparent or how water-repellant it is, just by stretching it!
The magic is its three layers. You begin with an elastic base. Add a slab of flexible Teflon riddled with nanosized pores. Last comes a coating of special lubricant with otherworldly properties. It never dries up or drips. And it makes the Teflon even slicker. Liquids roll off with ease.
But now . . . Stretch it. The nanopores widen and swallow the lube. Presto! The once-smooth surface is now pitted—and rougher and stickier than a cat’s tongue. Liquids are stopped in their tracks. The film also turns from translucent to opaque—because the rough surface scatters light.
Picture airy, sun-blocking tents that turn transparent and waterproof with darkness and rain.
Watch a video of it being tested. Just go to our website and search for "nanofilm."
I can't wait til they make a slip 'n slide from it! Just sayin’
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