The two states are named for the physicists who first described them. New sticky nano technology full#Liquid droplets on rough surfaces come in one of two states: Cassie, in which the liquid partially floats on a layer of air or gas, and Wenzel, in which the droplets are in full contact with the surface, trapping or pinning them. We have demonstrated for the first time experimentally that liquid droplets can be highly mobile when in the Wenzel state." Mobility of liquid droplets on rough surfaces is highly dependent on how the liquid wets the surface. "Our surfaces combine the unique surface architectures of lotus leaves and pitcher plants in such a way that these surfaces possess both high surface area and a slippery interface to enhance droplet collection and mobility. "This represents a fundamentally new concept in engineered surfaces," said Tak-Sing Wong, assistant professor of mechanical engineering and a faculty member in the Penn State Materials Research Institute. University Park, PA | Posted on August 31st, 2015Įnhancing the mobility of liquid droplets on rough surfaces could improve condensation heat transfer for power-plant heat exchangers, create more efficient water harvesting in arid regions, and prevent icing and frosting on aircraft wings. Now, Penn State researchers have developed nano/micro-textured, highly slippery surfaces able to outperform these naturally inspired coatings, particularly when the water is a vapor or tiny droplets.Īn engineered surface unsticks sticky water droplets As slippery as these surfaces are, however, tiny water droplets still stick to them. The leaves of the lotus flower, and other natural surfaces that repel water and dirt, have been the model for many types of engineered liquid-repelling surfaces. In contrast, the new slippery rough surface enables high mobility for Wenzel droplets.ĬREDIT: Xianming Dai and Tak-Sing Wong, Penn State In conventional superhydrophobic rough surfaces, tiny liquid droplets in the Wenzel state will remain pinned to the surface textures. They come in a size of 4 inches (10cm) and if you want to customize to fit a smaller area, simply trim the pad with regular scissors for a custom fit.Home > Press > An engineered surface unsticks sticky water droplets Thanks to the powerful built-in nanotechnology, you can reuse these sticky pads over and over for years with the same stickiness that you enjoyed from the first time.Ĭustomize the shape and size of your sticky pad. If they ever become greasy or dirty, just wash them with warm water, and they’ll return to their original stickiness. Put them anywhere that you want just a little bit of extra grip: These gel pads are safe to use on practically any surface. Stick a GPS system to your car’s dashboard Stick them to the wall and perfectly hold your phone for video calls. The possibilities are endless with these sticky gel pads! We offer them in a clean, stealth black, making them appropriate for a variety of spaces. Using innovative nanotechnology, these sticky gel pads will hold onto your phone, GPS, drinks, keys, or really anything for days without losing its grip.
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