Gav and Dan are in the GE lab using nanotechnology to show you cool liquid physics at 2500fps.  
The first experiment shows a superhydrophobic surface that GE has been working on. Surfaces like this can be useful in aviation and wind power to reduce ice build-up or for self-cleaning applications. The surface traps a layer of air using its nanoscopic structure, which prevents water from sticking. 
The second experiment also demonstrates how the nanoscale differs from the macroscale, this time with iron filings. Iron filings at the macroscale can be easily distinguished from the liquid they are in. When reduced to the nanoscale, magnetic nanoparticles can behave like a liquid magnet. Gav and Dan demonstrate this by showing magnetic liquid flowing upwards against gravity towards a magnet. 
"Super Hydrophobic Surface and Magnetic Liquid - The Slow Mo Guys"

Voiceover, Dialog, Spoken Text, Script, or Lyrics

I could literally watch that one. 
Yeah, I know. It's awesome. 
Hello there and welcome to this extremely scientific episode of The Slow Mo Guys. We're in a lab. 
Yeah, for once actually. 
For once our lab coats make sense.  
GE actually flew us all the way to New York to their labs, which is awesome. Interrupted my holiday and everything. 
Yeah. They want us to film a bunch of their technologies so we're gonna start with this video. We've also done two other videos on GE's channel, so be sure to check those out. Ch-ch-check those out. 
This video's got some super hydrophobic material. It's man made, and acts similarly to a lotus leaf. So if you want to put some water on the leaf. The water just runs off. That's hydrophobic material. This one here is man made. We're gonna test that with some food coloring and water. And get that in slow mo. 
So the way it works in nature is that the tiny nanoscopic hairs on the plant which trap a layer of air and that causes the water just not to be able to penetrate.  
This is the man made version so we're just gonna take the phantom and we're gonna take a macro lens and get some super close up shots of the way water reacts on a super hydrophobic surface. Science. 
I'm just pouring out some food coloring into this container here. And we're gonna pour it onto the surface all at the same time and hopefully... 
Get a nice collision, yeah? 
Get a nice collision, sort of exploosion of air. Good word 
Yeah, that is the technical term. 
Yeah, I believe so. 
So we've got red and blue. 
Red and blue. Hopefully it will merge and we'll get some good shots. Three, two, one, pour. 
I've honestly... 
Look at that! 
...I've seen robots that took less time than that. 
That's ridiculous! Literally merging. 
I like how it sort of looks like a flower. It spreads out completely and then just bounces off. 
It's so weird. 
It's really cool. 
All right, so now we're gonna try that again, but backlighted so we can see through the liquid. 
Three, two, one, drop. 
So another thing that happens is that ion filings in water when the magnet goes up to them, it's very easy to differentiate the ion filings from the liquid. If the ion filings have been shaved down to a nanoscopic scale, you basically get metallic liquid.  
Like Terminator 2 basically. 
It looks like the T-1000. 
OK, so here is the ferrous liquid, so it's got the nano-sized ion filings and this is a magnet. We're gonna place the magnet down the test tube like this and then lift up the liquid towards the magnet and watch as it gets attracted. 
Give it a go. 
See how it, like, indents before. It like, pushes down and then shoots up. And you end up with basically a magnetic ball. 
That is really cool. 
So weird. 
And even sort of attracts other bits of metal as well. See how that works there.  
Keep the plate slightly angled toward the camera, not away. 
OK. Ready? 
Yeah. All right. That's good. 
I just love the way that it... 
I'm sorry. 
There's no need for that. 
I'm sorry. 
This was literally brand new. 
That has literally been in use for about 30 minutes. Well, I hope you enjoyed that video. Can't really go wrong with liquids, they always look good. So, uh, be sure to follow us on Twitter and also check out the two videos we made for GE's channel. One is called "MEMS" and the other is called "Cold Spray". And if you're intrigued by them, give them a click. Give them a watch. 
Check them out. 
I guess we better get escorted out of here. 
They don't really trust us. 
See you later.

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The Slow Mo Guys 
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GE Global Research

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Dates: - May 2015
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