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Lotus Nanotech

Makarand writes "The lotus, a flowering plant native to Asia whose waxy leaves repel water droplets and particles of dirt, is teaching nanotechnologists a thing or two. Scientists at BASF have found that the lotus plant surfaces have a coating of wax crystals around 1 nm in diameter. This roughness on the nanometer scale helps the plant surface to reduce the actual contact area to 2-3% of the droplet covered area making its surfaces superhydrophobic. If the surface is slanting, the droplet rolls off, instead of sliding off, picking up small particles of dirt on the way giving a "self-cleaning" effect. BASF is now working on an aerosol spray to coat a surface with such a self-cleaning nanostructure. The self cleaning shoe might soon be a reality."

60 of 161 comments (clear)

  1. Self Cleaning Shoes by Ninja+Master+Gara · · Score: 2, Funny

    Just what we need, putting more people out of work by making them redundant. tsk.

    --

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    When I grow up, I want to be a kid again.
  2. self cleaning windows by cat_jesus · · Score: 5, Interesting

    Forget the self cleaning shoe. This will be great for windows on skyscrapers.

    1. Re:self cleaning windows by Ninja+Master+Gara · · Score: 3, Insightful
      That said, in its current form, the spray may affect the colour of dark surfaces as its layers are slightly opaque. The coating can also be mechanically unstable on smooth surfaces. But BASF is working to overcome these problems.

      Glass isn't in the market yet, but looks like it'd made a great varnish. No more coasters!

      --

      ---
      When I grow up, I want to be a kid again.
    2. Re:self cleaning windows by melonman · · Score: 2, Informative

      Until the coating half wears off and then you have to wash the entire skyscaper with tetrachlorowhatever to get the residue off. Products like this for glass already exist. Tried them on my car. Once.

      --
      Virtually serving coffee
    3. Re:self cleaning windows by Anonymous Coward · · Score: 4, Informative

      It does exist and is avaliable: http://www.pilkington.co.uk/australasia/australia/ english/building+products/whats+new/news+items/pil kington+activ.htm L.

    4. Re:self cleaning windows by skeedlelee · · Score: 3, Insightful

      This seem a little odd to anyone else? If the particles are ~1nm they really shouldn't significantly interact with visible light passing through it all that much should they? My guess is that yes, the surface is rough at the ~1nm scale but the coating itself is 100's of nm thick, when the hydrophobic polymers are considered. Or perhaps their spray technology still need a bit of work, if they're spraying globs of particles that could explain it as well.

    5. Re:self cleaning windows by Ratface · · Score: 3, Informative

      ... and this earlier Slashdot article about the self-cleaning glass concept.

      --

      A little planning goes a long way...
    6. Re:self cleaning windows by citizenkeller · · Score: 5, Funny



      anybody else feels a bit strange at the thought of lotus technology applied to windows?

      </silly mode>

      --
      -- Serge K. Keller
    7. Re:self cleaning windows by randomErr · · Score: 5, Informative

      Self-Cleaning Glass is already out. Pilkington has had it for about a year and a half.

      This ActivGlass as it called does one better the this coating because not only does it repel water, it also uses sunlight to kernel up dirt so when that when it rains that dirt just runs off.

      --
      You say things that offend me and I can deal with it. Can you?
    8. Re:self cleaning windows by Quixadhal · · Score: 3, Interesting

      Forget windows... how about self-cleaning dishes?

      Of course, I'd want the habenero-flavored coating myself...

    9. Re:self cleaning windows by demonbug · · Score: 2, Funny

      Forget self cleaning windows, how about self cleaning self? Just spray this stuff on myself, and no more showers! I bet chicks dig the waxy coating, too.

    10. Re:self cleaning windows by abcho · · Score: 2, Informative
      Activglass is hydrophilic (ref), not hydrophobic - as in the lotus leaf!

      So, ActivGlass does not "repel" water or faciliate water beads, it spreads water evenly on the glass surface. The two technologies are entirely different, but may have similar applications. I would think that a hydrophobic surface would work better - since the longer water sticks to the surface, more additional flying dirt will be captured by the water!

  3. Self cleaning shoes? by Sam+the+Nemesis · · Score: 4, Insightful

    For this thing to work as in lotus, shoes will need water droplets to be sprayed on them.

    1. Re:Self cleaning shoes? by girl_geek_antinomy · · Score: 2, Funny

      Isn't that usually known as rain...?

  4. Aerosol spray, eh? by RomikQ · · Score: 5, Funny

    And what if you got some of the spray onto your socks while applying it to your shoes... I can see it now - forever stinking, laundry-resistant... oh the horror!

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  5. Shoe polish by NeoSkandranon · · Score: 5, Interesting

    If this becomes a reality, expect to see it in Kiwi shoe polish. Thousands of ROTC students and millions of military personnel would be a pretty good market for Kiwi Black Self-cleaning(TM) ...dunno how you'd buff it though, considering it repels water so violently

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    If you can't see the value in jet powered ants you should turn in your nerd card. - Dunbal (464142)
    1. Re:Shoe polish by abhinavnath · · Score: 2

      You don't need water to buff it! Although some militaries teach soldiers to use water, you can get a good shine by just buffing it dry, with wax-based polish.

      --
      My other sig is also a .Porsche
    2. Re:Shoe polish by drinkypoo · · Score: 2

      I'm sure the military won't allow it. It would reduce the effectiveness of your drill seargeant pissing on your boots.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    3. Re:Shoe polish by Jester99 · · Score: 2

      Now why in the hell would Kiwi want to do that?

      "Look! Just buy this one can of shoe polish from us, and you'll never need another."

      "Erm. Hm. Scratch that. Just buy the old stuff. Over. and over." :P

  6. Sweet by Soporific · · Score: 5, Funny

    I'll just be able to give myself a coating and not worry about bathing for a year.

    ~S

    1. Re:Sweet by NeoSkandranon · · Score: 5, Funny

      You'd just have to run around naked in the rain to get it to work properly =p

      --
      If you can't see the value in jet powered ants you should turn in your nerd card. - Dunbal (464142)
    2. Re:Sweet by ottffssent · · Score: 2

      As long as you can avoid getting arrested for running naked through the rain, yes!

    3. Re:Sweet by abhinavnath · · Score: 5, Funny

      You'd just have to run around naked in the rain...

      So take a shower, is that what you're saying? Dammit that doesn't help at all.

      Accursed lameness filter.

      --
      My other sig is also a .Porsche
    4. Re:Sweet by EggplantMan · · Score: 2
      ... and not worry about bathing for a year.
      Yes, only this time you'll be clean.
      --

      ?-|||-----x<*))))><
  7. Somebody call Fess Parker by Anonymous Coward · · Score: 5, Funny

    making its surfaces superhydrophobic.

    Jim get the shotgun, the lotus has the hydrophoby!

    Explanation

  8. Not new by DarkDust · · Score: 5, Interesting

    This is Lotus effect is actually known for some time now. I saw an article about it and the (already successful) attempts to mimic this well over a year ago. My girlfried, who is varnisher, said there is already varnish avaible with such an effect but it's way too expensive to paint a car with it. And AFAIK there is already keramics avaible with this effect, being very expensive, too. But as always, prices should drop once going into mass-production :-)

  9. This has been around... by Space+Coyote · · Score: 3, Funny

    remember this?

    Colonel Homer's outfit when he became Lurlene Lumpkin's manager..
    "Now this is made from a space-age fabric especially designed for Elvis. Sweat actually cleans this suit!"

    --
    ___
    Cogito cogito, ergo cogito sum.
  10. Uhhh, what about an Automobile... by awfar · · Score: 5, Interesting

    where massive amounts of fresh water are wasted every day to wash them (not to mention the long lines on Saturday mornings). And, this hydrophobic nature would make the body last even longer even here in Michigan(!). Or, a boat that doesn't soil so there is no need to pollute the lakes and streams with cleaners. Or, durable items that look as good as new for twice as long, reducing the human (or American) need to replace items with new looking appliances...

    This is a great innovation.

    1. Re:Uhhh, what about an Automobile... by drinkypoo · · Score: 2
      I rarely wash my car. When I do, I use a drive-through car wash because I have a sports car and it is slick and smooth, thus actually gets clean going through those stupid things. At that point you can solve the pollutant problem at the car wash, which only uses a fairly nonoffensive detergent and ionized water anyway.

      Also, people replace appliances not because they are dirty, but so that they can keep up with the icons on their neighbors' appliances, and because crappy electronics break when subjected to dumb americans poking and prodding them indiscriminately. Even game consoles are susceptible; One of the neighbor kids pushed on his PS2's drawer too hard and it went off the track. I fixed it for him, big woop, but most people won't be able to and they'll just discard and replace.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  11. Nature by Anonymous Coward · · Score: 5, Insightful

    Some people wonder why we should bother about the environment and saving plants and animals: this is why. All our great ideas come from Nature. 4+ billions years has have gone into "designing" the various flora/fona alive now and it would be extremely dumb to waste all the R and D.

    Some other things ideas from nature:

    • the airplane wing
    • sonar
    • radar (bats) (okay, similiar to sonar)
    • several plants have been use for medicines

    There's also research being done in using some kinds of spider silk to replace steels cables: three times stronger and about half the weight. I wonder what things we'll never discover because the plant/animal species has gone extinct.

    1. Re:Nature by benzapp · · Score: 2, Funny
      Of course, we can't forget the three biggest conrtributions from nature

      Marijuana - the classic

      The Poppy - heroin, morphine, opium... God's own medicine

      Coca - cocaine. Nature's best stimulant

      Just think of how boring civilization would be if it was not for these three mind alterning substances.

      PS: Yes, so the heroin has some acetic acid, but you could conceivably get that from fermenting some fruit...

      --
      I don't read or respond to AC posts
    2. Re:Nature by mattdm · · Score: 3, Insightful

      Point of correction: The airplane wing is less a product of nature than physics.

      Since when is physics supernatural?

    3. Re:Nature by jaredcoleman · · Score: 2

      I think you missed the point. We are talking about the OBSERVATION of nature, which is much different than designing something from scratch to take advantage of laws of physics. I didn't think I had to make that difference explicit, but then, that assumes that you read the posts...

    4. Re:Nature by mattdm · · Score: 2

      Nothing is designed from scratch, *especially* when it comes to physics. Planes *do* fly the way birds do; we just were making poor observations about what it was that made birds fly -- all of the flapping is distracting. In fact, the Wright brothers' success came directly from watching birds wings and understanding better exactly what was going on.

    5. Re:Nature by renoX · · Score: 2

      Physics can be "supernatural": some physics experiments can produce condition which does not exists in the nature: for example, very low temperatures have been produced much lower than exists in the natural world.

  12. Re:I wonder how long by shaitand · · Score: 5, Funny

    When are we going to realize that lab rats are cancer prone in general? I think lab rat, I think cancer on a stick.

  13. Re:Finger prints on my monitor? by k98sven · · Score: 2

    What can they do for all these dang fingerprints on my monitor?

    Truth is, not much. Fingerprints are fat, and are
    as such hydrophobic. Not only that, they're very small (mass-wise) and are spread out,
    which means a lot of surface area per unit of fingerprint substance.

    I'd just recommend: Keep your fingers off the monitor!

    As a help, you *could* coat your monitor with some carcinogenic toxin that is absorbed through the skin. (There are quite a few good candidates)

    Or how about removing the ground from the CRT? As soon as you touch the bugger: *ZAP*
    (Pavlov's dogs, anyone?)

  14. Scientists Also Discovered ... by LordYUK · · Score: 5, Funny

    ... that if you turn the lotus sideways, it produces 3 resources, or "mana" if you will, before burying itself at the end of the round.

    --
    This is my sig. Its pathetic.
  15. The best application by TiMac · · Score: 4, Interesting

    Coat waterslides in this stuff. Imagine screaming down a waterslide that has virtually no friction. WHEEEEEEEEE!

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  16. More ideas from nature by mtec · · Score: 2, Funny


    The couch (big flat rocks with lumbar support)
    Fast food (grubs)
    Pamela Anderson (Grand Tetons)
    The Rolling Stones (dinosaur fossils)
    Windows (swarms of locusts)

    --
    Cake or Death? Cake Please!
  17. Is this really nanotech? by henben · · Score: 4, Insightful

    I can remember when nanotech implied nano-scale machines. Surely a clever (but passive) new type of coating is materials science, or something?

  18. Finally! by Anonymous+Custard · · Score: 2

    Finally, I'll no longer have to waste hours and hours each day cleaning my shoes!

  19. Re:Nice Pants by Cyno01 · · Score: 2

    I'd think teflon coated pants would be very hard to sit in.

    --
    "Sic Semper Tyrannosaurus Rex."
  20. Re:Finger prints on my monitor? by brunes69 · · Score: 2

    Heres an idea... don't touch your monitor??? Why would you be doing this anyways, unless its a touchscreen?

  21. What ... by torpor · · Score: 2

    Americans aren't Human too?

    I thought so, but confirmation on /. of these sorts of things always makes life easier.

    --
    ; -- the corruption of government starts with its secrets. a truly free people keep no secrets. --
  22. At BASF... by Anonymous Coward · · Score: 3, Funny

    ...we don't make a lot of the nanotech you buy, we make a lot of the nanotech you buy, deadlier.

  23. that's not egg white matey by DrSkwid · · Score: 2

    well, not chicken eggs anyway.

    --
    There are places where the networks are not touching,and there are places where they are-Boeing's Lori Gunter
  24. I have a better solution by DrSkwid · · Score: 4, Funny

    I don't clean my car, haven't done for 2 years or so and my car is white.

    The dirt seems to reach equilibrium.

    --
    There are places where the networks are not touching,and there are places where they are-Boeing's Lori Gunter
  25. Products already available! by egghat · · Score: 3, Interesting

    You need self cleaning glass? Look here.

    You need a self cleaning toilet? Look here.

    I'm sure that there will be many more examples of this great technology in the next months.

    Bye egghat.

    --
    -- "As a human being I claim the right to be widely inconsistent", John Peel
  26. Superhydrophobic? by rizzo · · Score: 2

    You mean it's got rabies?

    --

    "More organs means more human." - Zim

  27. But how long does it last? by Thag · · Score: 5, Insightful

    I mean, if the crystals are that small, how long before they erode away?

    On the lotus plant, I would imagine that the crystals are continually being replenished, and even then how long does the blossom last?

    Jon Acheson

    --
    All opinions expressed herein are my own, and not those of my employers, who are appalled.
  28. Nanotech water repellents in fabric already.... by user+flynn · · Score: 3, Informative

    "However, Soane had a test garment on hand, a men's shirt, made with fabric from the nanotechnology process. He gleefully poured water and coffee on it and the liquids ran off (onto Burlington's boardroom table) without being absorbed by the fabric. But he noted that pressure would cause the liquid to pan through the fabric." New Century News article

    --
    In the distance you hear an ominous moo.
  29. SLIPPERY. by _ph1ux_ · · Score: 2

    wouldnt this make the shoes you apply this to rather slippery and dangerous?

    This reminds me of the time I decided to pledge my hardwood floor. A friend came over right as I finished and said "Wow - your floor looks greaaaaaahhHH!!" thump. Oops!

    1. Re:SLIPPERY. by Myco · · Score: 2

      Or at least apply the polish more evenly.

  30. Best application for the new technology... by tlambert · · Score: 2

    The best application for the new technology is probably Grafitti.

    That way, when you tag something, you can spray this on top of it, and they will never be able to paint over your grafitti.

    -- Terry

  31. Whew! by ellem · · Score: 2

    I thought there was _another_ version of Notes coming out!

    --
    This .sig is fake but accurate.
  32. Re:Finger prints on my monitor? by Myco · · Score: 2

    A trackball will keep your place more reliably than a finger.

  33. certainly fits with buddhism by shomon2 · · Score: 2

    The lotus plant is a metaphor in some buddhist schools of thought. "The most beautiful lotus plant grows from the muddiest swamp" - meaning that if you go through loads of problems and shit in your life, you will become the best person possible.

    If that means as a buddhist I have nanotech (albeit patented! - oi! shakyamuni should claim prior art!) shit repelling skin, all the better!

    Ale

  34. Re:what happens if... by EggplantMan · · Score: 2

    You shit your pants.

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  35. Re:Human Use by EggplantMan · · Score: 2

    Perfume consists mainly of organic molecules, so I tend to think that they would go together fine.

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    ?-|||-----x<*))))><