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Engineering Materials
Super-Slippery Coating Inspired by Carnivorous Plant
9/25/2013

An ultraslippery coating that repels oil and water even on vertical surfaces is created with a glass honeycomb-like structure with craters (left). This is coated with a Teflon-like chemical (purple) that binds to the honeycomb cells to form a stable liquid film. The film repels droplets of both water and oily liquids (right). Because it's a liquid, it flows, which helps the coating repair itself when damaged.   (Source: Nicolas Vogel, Wyss Institute)
An ultraslippery coating that repels oil and water even on vertical surfaces is created with a glass honeycomb-like structure with craters (left). This is coated with a Teflon-like chemical (purple) that binds to the honeycomb cells to form a stable liquid film. The film repels droplets of both water and oily liquids (right). Because it's a liquid, it flows, which helps the coating repair itself when damaged.
(Source: Nicolas Vogel, Wyss Institute)

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Elizabeth M
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Interesting stuff
Elizabeth M   9/25/2013 10:16:11 AM
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This is quite an interesting development, Ann, and the way scientists used their inspiration to create such a unique and useful material is fascinating. I wouldn't have even known about this plant, yet alone thought to use it to inspire a self-healing, durable material like this that could have a major impact on future product and device design. I am endlessly suprised by where researchers glean their creative inspiration for some of the inventions we cover.

Ann R. Thryft
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Re: Interesting stuff
Ann R. Thryft   9/25/2013 11:34:08 AM
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I agree, the creativity shown in this one meets part of my definition of innovation. What I also liked about it is the fact that the researchers have continued to pursue this line of inquiry and now have a third-generation or so implementation of the original material concept. The next-gen version after this one will most likely be a commercialized form.

NadineJ
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Re: Interesting stuff
NadineJ   9/25/2013 12:30:56 PM
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It's nice to see the progress being made here.  I can't wait to see real world application.

As a kid, we had a Venus Flytrap plant.  Carnivorous plants are really interesting to watch.  Other kids may have torched ants with magnifying glasses; I caught flies to feed to our plant!  Great inspiration.

Ann R. Thryft
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Re: Interesting stuff
Ann R. Thryft   9/25/2013 1:35:01 PM
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Glad you liked this one, Nadine. We don't always get to find out what happens to some of these inventions after the initial reports and sometimes nothing happens and they don't get any further towards commercialization.
My first introduction to a carnivorous plant was science class, also a Venus Flytrap. Smelly! Mostly because of the dead insects decomposing.

78RPM
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Gold
Re: Interesting stuff
78RPM   9/25/2013 3:31:07 PM
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I can think of a practical application. Have you watched the Indy 500 with the onboard cameras running? The glass cover on the camera has to rotate when it gets dirty so as to expose a fresh clean area. This substance could make lens cleaning unnecessary. I see that there is increased interest in backup cameras being installed on automobiles. This stuff could make it easy to keep road dirt off the camera lens.

Ann R. Thryft
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Re: Interesting stuff
Ann R. Thryft   9/25/2013 6:37:45 PM
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We sure have some creative commenters. Thanks for that application idea, 78RPM. I was thinking more like passenger car windshields, but outdoor cameras of all kinds could use this stuff, too.

Elizabeth M
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Re: Interesting stuff
Elizabeth M   9/26/2013 5:46:47 AM
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I agree that carnivorous plants are fascinating, but don't know much about them beyond the Venus flytrap. I've never actually observed them up close but think they would be quite wild to see. When I was young and first learned about them I actually was afraid they could eat me! But then again, I was a nervous child. ;)

Elizabeth M
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Re: Interesting stuff
Elizabeth M   9/26/2013 6:06:05 AM
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That's a good point, Ann, on getting to see the follow-through on the technology. Alot of things we report on don't ever make it into commercial use. Good on you as well for following up and reporting on what happens when the technology leaves the lab.

szyhxc
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Re: Interesting stuff
szyhxc   9/26/2013 8:58:31 AM
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Ann,  Don't look for funding from the auto industry soon.  Thire margins (except for low volumn exotics) are too thin.  A more luctrative source might be aviation when bugs and dirt can have real safety implications.  Will this surface stand up to high velocity air and water flows? 

Ann R. Thryft
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Re: Interesting stuff
Ann R. Thryft   9/26/2013 12:43:12 PM
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szyhnc, we know the automotive OEMs have thin margins. But there's a huge aftermarket for all kinds of add-ons, including cameras, additional sideview mirrors, etc. that this coating might be applied to, and that people spend a surprising (to me) amount of money in.
The only tests I saw mentioned were touching the surface, applying and then peeling off a piece of tape, and wiping the surface with a tissue. Since these took place in a university research lab, apparently there's been no wind tunnel or waterfall tests yet.

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