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Video: Water Droplet Bounces Off a Superhydrophobic Nanotube Array

Posted October 14, 2010 1:46 PM

From Popular Science - New Technology, Science News, The Future Now:

Hydrophobic materials have all kinds of practical applications, from creating surfaces that never have to be cleaned to making supertankers and container ships glide more efficiently through the water. But practical applications aside, this amazing video -- showing the crazy, beautiful ways water droplets interact with a carbon nanotube array --might be mistaken for art rather than science.

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chrisg288
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#1

Re: Video: Water Droplet Bounces Off a Superhydrophobic Nanotube Array

10/15/2010 8:48 PM

so is this considered to be a frictionless surface? (for water)
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redfred
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#2
In reply to #1

Re: Video: Water Droplet Bounces Off a Superhydrophobic Nanotube Array

10/17/2010 12:11 AM

No Chris, if it were frictionless then the water would come back to the same height on the other side of the half tube. It would also take many oscillations back and forth to finally come to a rest after dissipating its energy to moving the air around it.

Still this is a very cool video.

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chrisg288
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#3
In reply to #2

Re: Video: Water Droplet Bounces Off a Superhydrophobic Nanotube Array

10/17/2010 12:57 AM

okay... you are probably right.. (discounting air friction).. I wonder what it would do in a vacuum?

chris
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user-deleted-1105
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#4

Re: Video: Water Droplet Bounces Off a Superhydrophobic Nanotube Array

10/17/2010 2:35 AM

If it were frictionless the droplet wouldn't necessarilly get up to the same height, there is still the internal friction within the droplet as it wobbles it's merry way.
Does it rotate? or slide or what, have to paint one of those yellow and black targets on the side of it.
When it turned at the top did it do it like one of those kids on a skateboard?
Del

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