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Scientists Sort Semiconducting Nanotubes by Size

SuperGrads writes "Scientists working at Rice University have developed the world's first method for not only sorting semiconducting carbon nanotubes from their metallic brethren, but also for arranging them by diameter size. This ability is essential for building devices from these tubes and paves the way for high-speed nanoscale electronics."

63 comments

  1. Monstrosity! by nog_lorp · · Score: 5, Funny

    This is disgusting! Until it can be proven that carbon atoms are not alive according to God, these evil scientists must be stopped from experiment on them!

    (/me mods own post: troll)

    1. Re:Monstrosity! by eln · · Score: 3, Funny

      Please don't hold back this important research! With this technology, we may be able to rid ourselves of our reliance on ants to perform the important work of sorting tiny screws in space.

    2. Re:Monstrosity! by heinousjay · · Score: 2, Funny

      Oh, come on mods - having even the tiniest sense of humor should be a prerequisite for getting points.

      --
      Slashdot - where whining about luck is the new way to make the world you want.
    3. Re:Monstrosity! by benjamin264 · · Score: 1

      If that were the case I would have posted "Simpsons did it! Simpsons did it!" Toads in Australia, the sun blocking and now sorting nanotubes... It could be a new meme! Which would be almost as exciting as seeing us getting closer to molecular nanotechnology.

    4. Re:Monstrosity! by Chris+Burke · · Score: 5, Funny

      This is disgusting! Until it can be proven that carbon atoms are not alive according to God, these evil scientists must be stopped from experiment on them!

      You're right, so I asked God. He said no, carbon nanotubes are not living beings in His eyes. Then he said that skin cells were, and I was going to Hell for so brazenly sloughing them off by the thousands right in front of Him. He sounded really angry, and I got really scared, then He told me he was just kidding, cells were part of my body and their deaths were a natural part of my life. Then He said that viruses were not part of my body, and that most of my white blood cells were going to Hell. He vanished before I could ask him if he was joking or not.

      God has a weird sense of humor.

      --

      The enemies of Democracy are
    5. Re:Monstrosity! by SimplyI · · Score: 1

      I don't want to start any blasphemous rumours But I think that God's got a sick sense of humor. And when I die I expect to find him laughing

    6. Re:Monstrosity! by Anonymous Coward · · Score: 0

      This is complete bullshit.

      I bought nanotubes by size back in 1992, verified them myself.

      Pretty sure Cambridge Isotopes was the supplier... it was 14 years ago however.

      Definitely not "the world's first method". Even if supplied with a mixture I could have separated them myself. (Serial gel permeation columns and fractions verified by MS)

      I suspect the folks at J. Am. Chem. Soc. did not subject his one to sufficient review. Must be young pups on this one.

      I would have expected this kind of crap from physicsweb.org, but J. Am. Chem. Soc.? Disappointing.

    7. Re:Monstrosity! by Dannon · · Score: 1

      God has a weird sense of humor.

      No kidding!

      How else do you explain the duck-billed platypus?

      --
      Good judgment comes from experience.
      Experience comes from bad judgment.
  2. Let's just hope by celardore · · Score: 3, Funny

    Let's hope nobody sneezes!

    ACHOO!!!! Ahhh crap... Gotta start again.

  3. In the future... by Reality+Master+101 · · Score: 4, Funny

    When electronics in the future is made up of carbon tubes of different sizes, will we have machine in the drug store with all sorts of various sockets that I can plug them into to test them?

    (this joke may reference things that are too old for the average Slashdotter to get. :D)

    --
    Sometimes it's best to just let stupid people be stupid.
    1. Re:In the future... by sconeu · · Score: 1

      Some of us remmeber the old tube testers (with the bins of new tubes underneath).

      --
      General Relativity: Space-time tells matter where to go; Matter tells space-time what shape to be.
    2. Re:In the future... by Reality+Master+101 · · Score: 1

      Some of us remmeber the old tube testers (with the bins of new tubes underneath).

      The gut wrenching part in the site I linked to is the fact that they had the tube tester in their "museum". Couldn't it be in their "specialty part boutique" or something? :D

      --
      Sometimes it's best to just let stupid people be stupid.
    3. Re:In the future... by rts008 · · Score: 1

      You must be "older than dirt" to even suggest this.

      This I know for a fact because I can remember the tube testers in the stores, and I, sadly, am also older than dirt according to my step-daughter.

      I guess it could be worse: we could be from an era that did not comprehend electronics at all! :0

      --
      Down With Slashdot BETA!!! I've been around the corner and seen the oliphant; you can only abuse me from your perspecti
    4. Re:In the future... by BigCheese · · Score: 1

      I remember going with my dad to get new tubes for all the dead TVs in the basement. He liked to collect and fix them. I learned to solder before I could ride a bike.

      So, now we've got nanowire, nanotubes and nano*. Does this mean that Singularity is almost upon us?

      --
      The obscure we see eventually. The completely obvious, it seems, takes longer. - Edward R. Murrow
    5. Re:In the future... by Anonymous Coward · · Score: 0

      Sadly, there are still a few youngsters who get it. I'm 20, and the surplus store that used to be down the street from me has a tube tester. I play with audio circuits from time-to-time, and he's always got NOS tubes there. So, no, you don't have to be older than dirt... you just have to enjoy playing with things that are.

    6. Re:In the future... by UncleMantis · · Score: 0

      OMG I must be showing my age. I actually remember seeing one of those things!

      --
      Uncle Mantis
    7. Re:In the future... by pluther · · Score: 2, Funny

      The hard part is finding them again after you've plugged them into the machine...

      --
      If the masses can keep you down, you're not the Ubermensch.
    8. Re:In the future... by Anonymous Coward · · Score: 0

      In to to?

    9. Re:In the future... by SEWilco · · Score: 1

      All I need is a 100 nm triode tube.

    10. Re:In the future... by zippthorne · · Score: 1

      No one still uses the phrase, "older than dirt." It's antique. Ancient. Your very way of claiming you're out of date is out of date.

      --
      Can you be Even More Awesome?!
  4. Does this mean....... by phopon · · Score: 0, Troll

    SPACE ELEVATORS!!!

    1. Re:Does this mean....... by HermanAB · · Score: 1

      Hmmm, space elevators of varying sizes with all kinds of embedded electronics along their lengths...

      --
      Oh well, what the hell...
  5. You did what? by Nesetril · · Score: 2, Funny

    Ok, who shrunk the scientists this time?!

    --
    Jesus said to his disciples: "If you don't have a sword, sell your cloak and buy one" - Luke 22:36
  6. Not the main commercial application by asadodetira · · Score: 4, Interesting

    Nanotubes have many potential applications, but so far the most successful one is as conductive fillers http://www.patagon.8m.com/equations/cnt.html(adddi ng a small amount into a polymer makes is conductive enough to dissipate static charge or block electromagentic interference).
    Tons per year are used for this, particularly in the auto industry.

  7. Flea Circus by Joebert · · Score: 3, Funny

    If they start doing the flying trapeze act, I'm walkin away.

    --
    Wanna fight ? Bend over, stick your head up your ass, and fight for air.
  8. I am so tired of... by Nom+du+Keyboard · · Score: 1, Interesting
    ...and paves the way for high-speed nanoscale electronics.

    Hey, EVERYTHING I hear about nanotubes is promoted as paving the way for high-speed nanoscale electronics. When are they going to actually get here?

    --
    "It's the height of ridiculousness to say for those 9 lines you get hundreds of millions."
    1. Re:I am so tired of... by susano_otter · · Score: 4, Insightful
      Hey, EVERYTHING I hear about nanotubes is promoted as paving the way for high-speed nanoscale electronics. When are they going to actually get here?

      As soon as they finish paving the way, of course.

      Nobody drives to bleeding-edge technology on dirt roads anymore. Not since they paved the way to pavement.
      --

      Any sufficiently well-organized community is indistinguishable from Government.

    2. Re:I am so tired of... by Beale · · Score: 1

      You can keep paving and paving, but if no one is walking along the pavement... Okay, actually, if I recall correctly, the main problem is the mass-production of reliably sized nanotubes. Research continues as we type, but progress is slow.

    3. Re:I am so tired of... by chillax137 · · Score: 4, Insightful

      Here's a list of things that need to happen first:

      1. Experiments must be verified
      2. Efficiency of separation is increased
      3. This process must have the ability to scale up reasonably
      4. The cost of nanotubes becomes much less than $200/gram

      And at the end of the day, the production still has to be profitable in the marketplace. Sure these people want to talk about what the fruits of their research will be, they want more funding. I don't see why seem so upset that things like this take time.

      --
      chillax137
    4. Re:I am so tired of... by Anonymous Coward · · Score: 0

      when they've fucking finished, you stupid turd

    5. Re:I am so tired of... by Hillgiant · · Score: 1

      Wow, you really drove that metaphor into the ground.

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      -
  9. Jeeze! by PixelPirate · · Score: 3, Funny

    How disgusting! We must stop this attack on our values! We must stand up against this afront! Sort nanotubes by colour, not size! As we all know, size doesn't matter...

    1. Re:Jeeze! by bcat24 · · Score: 3, Funny

      You nanotube racist! Nanotubes should not be "sorted". The should be treated and respected as equals.

    2. Re:Jeeze! by cperciva · · Score: 1
      Quoth PixelPirate:
      How disgusting! We must stop this attack on our values! We must stand up against this afront! Sort nanotubes by colour, not size!
      Well, actually...
      Quoth the article:
      [...] semiconducting tubes are produced in a variety of sizes, each of which have different electronic and optical properties
      ... in a sense, they are sorting by colour.
    3. Re:Jeeze! by cabd · · Score: 0

      How THE HECK is the insightful? Funny, people, not insightful

      --
      When mad at one, try running a mile in their shoes. That way, not only do you have their shoes, but you are a mile away.
    4. Re:Jeeze! by bcat24 · · Score: 1

      I agree, I guess I shouldn't turn down karma, but my post sure wasn't insightful.

    5. Re:Jeeze! by Anonymous Coward · · Score: 0

      As we all know, size doesn't matter...

      If your girlfriend refers to it as "nanotube" it's starting to matter.

  10. And here's where I keep assorted lengths of wire. by Anonymous Coward · · Score: 5, Funny

    Fry: Whoa! A real live spaceship!
    Farnsworth: I designed it myself, let me show you some of the different lengths of wire I used.

  11. Finally... by revery · · Score: 5, Funny

    Well, can I be the first to say that it's about time. I've just been emptying my nanotubes into a big jar that I keep by the bed.

    --
    This is a joke. I am joking. You have been joked with.

    1. Re:Finally... by StikyPad · · Score: 1

      I've just been emptying my nanotubes into a big jar that I keep by the bed.

      I don't think that's the sort of "nanotube" they were referring to.

      Also that's disgusting. Just use a happy sock like everyone else.

  12. Could be fun.. by Anonymous Coward · · Score: 0

    World's smallest game of pick-up-sticks, anyone?

  13. As a Rice Owl myself... by ConfusedGuy · · Score: 3, Informative

    Rice does some pretty amazing stuff with nanotech-- I got a tour a few months ago of one of their interdisciplinary labs where electrical engineers are working alongside chemists who are collaborating with bioengineers. Really amazing stuff that's way beyond my scope (at least as a sophomore computer engineering major).

    Students at Rice are constantly drilled with the buzzword, though, and are probably more tired of hearing it than the rest of the technology world. It's hard to pick up a copy of the school newspaper without finding "NANOTECH" in big, bold letters somewhere on the first three pages.

    Now if only we could get our football team on par with the rest of the collegiate world...

    1. Re:As a Rice Owl myself... by admactanium · · Score: 1
      Rice does some pretty amazing stuff with nanotech--
      i always wondered how those people could write my name on a single grain of it.
    2. Re:As a Rice Owl myself... by Anonymous Coward · · Score: 0
      Now if only we could get our football team on par with the rest of the collegiate world...
      Or your baseball team, 23 and a third innings without a run. Ouch.
    3. Re:As a Rice Owl myself... by alshithead · · Score: 1

      I was hoping someone could emphasize that this is really cool. It looks like such a basic step to be able to categorize, but their usefullness depends on that. If you can't sort into certain sizes with certain properties, then they're just a novelty.

      --
      I reserve the right to think for myself. Others' opinions are optional. Puppy on lap = typos...not illiteracy.
  14. In other news... by blues_shuffle · · Score: 1

    Children sort toys by colour!

  15. Re:And here's where I keep assorted lengths of wir by CrazyJim1 · · Score: 1

    Thats exactly what I was thinking. Thanks for posting it for me. It saved me all that typing.

  16. Little America by Doc+Ruby · · Score: 0, Offtopic

    American labs seem to be creating the nanotech revolution. Especially government subsidized academic labs. Even the commercial labs like IBM get lots of public subsidy.

    I wonder whether the next generation of devices that uses the tech will see American developers use the "homegrown advantage". I wonder whether American education will lead the way in teaching how to produce software for these new kinds of (massively parallel, nonlinear, paradigm-busting...) devices.

    Will American investment in nanotech return a fair share of the benefit to Americans, or are we giving it away? Do multinational corporations count as "Americans"?

    --

    --
    make install -not war

    1. Re:Little America by Doc+Ruby · · Score: 0, Redundant

      Moderation -1
          100% Redundant

      No one posted anything about American nanotube investment or any of the other points I made. Mostly a lot of jokes about "nanotube equality" and jokes about theocrats. None mod'ed redundant.

      TrollMods hate America.

      --

      --
      make install -not war

  17. As the old Super Mario World says.. by The+Hobo · · Score: 1
    --
    There is another kind of evil which we must fear most, and that is the indifference of good men. -- Boondock Saints
  18. Nanotubes substitute Interconnect wires ? by kyc · · Score: 4, Interesting

    In theory, metallic nanotubes can have an electrical current density more than 1,000 times greater than metals such as silver and copper. [http://en.wikipedia.org/wiki/Carbon_nanotubes] So imagine that in a single pentium processor chip, there lies miles of carbon nano-tubes with excellent electrical properties that minimize their capacitive effects. This would definitely make a revolution on semiconductor fabrication, because in theory their[the nanotubes'] would be one hundredth of a 90 nm IC device. Translating this into our lives would mean to be able to play Battlefield for a duration of 24 hours in our one time charged lap-top. Or imagine palm computers that could beat the best GMs of chess today. Anything would be more scalable than ever if they could really make something of these nano-tubes rather than playing with them and sorting them. They say ninety nine percent of the research is just trash, but at one point, when the one percent succeeds then comes the breakthrough. We hope to see carbon nanotubes in our computers, maybe our children will do that.

    --
    There's plenty of room at the bottom! Richard P. Feynmann
    1. Re:Nanotubes substitute Interconnect wires ? by Jasper__unique_dammi · · Score: 1

      How long ago was one of the best GM beaten in chess by a computer, 10yrs? I recon a palm computer can beat a GM now.

    2. Re:Nanotubes substitute Interconnect wires ? by VendingMenace · · Score: 1

      the major problem with this kind of thinking appears to be the effects of entropy. At that scale intropy has a MAJOR effect and it becomes extremely difficult to organize things into complex assemblies. It will probably be very difficult to impliment hte architechture for a processor on this kind of scale -- at least not without a multitude of construction errors.

  19. This does not "pave the way" by wealthychef · · Score: 2, Insightful

    "paving the way" means, makes an easy path for travel. This just solves one difficulty out of many. The hype on Slashdot is relentless.

    --
    Currently hooked on AMP
    1. Re:This does not "pave the way" by SamSim · · Score: 1

      This is what's known as a metaphor.

  20. Should give them something to do... by Junior+J.+Junior+III · · Score: 2, Funny

    Good, I say. That should keep those scientists busy for a while.

    While they're at it, they can sort out my sock drawer. Gotta keep those PhDs employed...

    --
    You see? You see? Your stupid minds! Stupid! Stupid!
  21. How'd they do it? by Anonymous Coward · · Score: 0

    Little tiny elves.

    In other news Keebler licenses nano elves for a new type of cookie.

  22. wrong headline by Goldsmith · · Score: 3, Interesting

    Sorting semiconducting nanotubes by size? That's not a big deal, certainly not worth talking about here. Just grow the diameter and length you want.

    Separating semiconducting and metallic nanotubes in bulk? (microfluidics is bulk for nanotubes) That's a huge deal! We can't grow just metallic or just semiconducting nanotubes. Previously, we could look at nanotubes one at a time using various methods to *find* a metallic or semiconducting nanotube, but sorting is another thing. If this really works, it will be great for nanotube electronics.

    1. Re:wrong headline by citanon · · Score: 2, Informative

      The Resasco group at University of Oklahoma is getting pretty close to selectively producing semiconducting nanotubes of a fixed size. http://www.ou.edu/engineering/nanotube/

  23. Sorting nanotubes by SIZE? by BaronHethorSamedi · · Score: 1

    Those scientists must have fine tweezers and steady hands...