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  1. #1
    Stuper Moderator Feedback Score 0 HilbillyHomeboy's Avatar
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    Cool stuff inside

    Water Droplet Bouncing on a Superhydrophobic Carbon Nanotube Array
    Video from the paper "Bouncing Water Droplet on a Superhydrophobic Carbon Nanotube Array," authored by Adrianus I. Aria, Morteza Gharib, published online on ArXiv, Submitted on 7 Oct 2010:

    The first two parts of the video show the impact dynamic of 30 microliters water
    droplet at different impact velocity. At low impact velocity of 1.03 m/s, the water droplet deforms upon impact and eventually bounces off completely of the surface of the array. At higher impact velocity of 2.21 m/s, the droplet breaks up into many smaller droplets and eventually bounces off completely
    of the surface of the array.

    The coefficient of restitution of water droplet at very low impact velocity can be seen clearly by dropping a water droplet on a slightly tilted carbon nanotube array. At tilt angle of 2.5 degrees the droplet skips off of the surface of
    the array multiple times without showing any sign of pinning on the surface
    of the array, as demonstrated in the third part of the video. The fourth
    part of the video shows the sliding/rolling behavior of the droplet along the
    surface of a U-shaped carbon nanotube array. The fifth part of the video
    shows the impact of two identical 14 microliters water droplets to one another on a U-shaped carbon nanotube arrays. Upon impact, these two water droplets, which come from the opposite direction, merge to form one larger droplet.

    All parts of the video were captured by high speed camera operated at
    various frame rates. The droplet was illuminated from behind with a diffuse
    halogen light. The droplet was dropped on the surface by at-tipped needle
    and the volume of the droplet was controlled precisely by syringe pump.

    This work was supported by The Charyk Foundation and The Fletcher Jones Foundation.
    So cool.


  2. #2
    Member verified Feedback Score 0 DocWalt's Avatar
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    So cool, indeed. Nanotubes are pretty sweet, they're definitely going to lead to some serious advances in technology in the reasonably near future.
    - 24

  3. #3
    Forum User Feedback Score 13 (100%) Austin@STM's Avatar
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    I love watching things like this, you get to see what your actually seeing.

    -Ricer Evo 8: 8.75 @ 166 Best MPH of 167. Quickest 4G63 Powered Evo in The US!!!
    -Chris Cessna's Stock short block Evo 8: 9.76@150 Worlds Fastest Stock Motor Evo 8 and First Stock Block In The 9's!
    -Shawna's DD Evo 8: 9.97@143.88 Best MPH of 145 Full leather interior, A/C, navigation, stock brakes, cruisin 9's in style
    -Cory's Stock 7 bolt talon: 10.3@136 No crank walk here...
    -STM Stock turbo/motor Stealth RT: 10.95@127 Worlds Quyickest/Fastest and most powerful Stock turbo/ motor 3S
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    -Mike Faggiano Evo3 16g stock motor 1g 11.0@124 just a 16g knockin on 10's door.
    And the list goes on...

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    Man vs 3/S verified Feedback Score 6 (100%) R/T93's Avatar
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    Quote Originally Posted by Austin@STM View Post
    I love watching things like this, you get to see what your actually seeing.
    I love seeing what I see!!

    haha, cool vid though.
    93 R/T - Modded, Full Suspension, Full Exhaust, Quaife Diff, Turbo brakes, Alpine/Boston Sound One of 25
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  5. #5
    Forum User verified Feedback Score 1 (100%) thor'svr4's Avatar
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    as a chemistry major i really cant wait till i get to learn about some thing cool like this. gen chem sucked, organic chem is ok, but this is sweet.

    i don’t know if any of you guys watch modern marvels on the history channel but there’s one episode on alloys. its insane how some of these metals were designed. i cant find the clip but one guy made a metal alloy that you can bend anyway you want, but once you add hot water it will go back to whatever shape it was originally in. he wanted to make car bodies out of it so that after an accident you could just hose off your car with warm water and the sheet metal would return to normal. ill keep looking for the clip so i can post it.
    the basic go fast bits...
    forged short block, Billet DR1000's, 680cc injectors, meth inj, FMIC, MAFT, Apexi Neo, hotwired 255lph fuel pump.

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    Just a fun Daily Driver.

  6. #6
    Forum User Feedback Score 13 (100%) Austin@STM's Avatar
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    ya i've heard about that, i also read about Nissan (im pretty sure it was Nissan anyways) was developing a clear coat to do the same thing. They demonstrated with a peice of scotch-brite. Scrathed the hell out of the clear, them poured hot water over it and it was good as new. Would be awesome to have a car fix itself for once.


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