Slashdot Mirror


Nano Light-Emitting Fibers In the Lab

moscowde writes "Researchers at Cornell University have created a so-called Nano-Lamp — a microscopic collection of light-emitting fibers with dimensions of only a few hundred nanometers. The fibers are made of a polymer spiked with ruthenium molecules in a process dubbed 'electrospinning.' The bright spots on the fibers are smaller than the wavelength of the light they emit. The nanofiber glows bright orange when exposed to an electric field and can be seen in the dark with the naked eye. A professor at Princeton University called this 'a breakthrough in the way nanosize light sources are made.' Since the nanofibers are flexible, they could potentially be used in clothing or bendable computer displays."

21 of 67 comments (clear)

  1. Bendable screens by Actually,+I+do+RTFA · · Score: 5, Interesting

    Four questions about bendable screens (which I love the idea of. I would have to update my laptop if they come out with those.) I am not a scientist, so I have no clue what the answers could be.

    1. Since we don't have LED monitors yet, only plasma, DLP, CRT and LCD, would we actually be able to make Nano-light fiber monitors
    2. 100 volts of electricity to make light that can only be seen in a dark room? Would we be able to power this via a battery for any length of time, and would I get electricuted if I dropped it?(1)
    3. Is there any degree of control for which elements in the strand light up?
    4. Are we limited to monochrome screens, or will we use three elements (Lithium, Copper and Cobolt??) for RGB?
    --
    Your ad here. Ask me how!
    1. Re:Bendable screens by Anonymous Coward · · Score: 3, Informative

      For bendable LCD screens, look at this article ( http://www.physorg.com/news5142.html ).

      1. This is not true. If you have a LG, Samsung, Motorola cell phone, then you are using the current technology, OLED (organic LEDs). Please look-up Samsung. On the "open market," Samsung has released their OLED screens (2005; http://www.physorg.com/news5318.html). A possible outcome for the technology presented here is increasing the number of pixels/cm, smaller screen devices.

      2. See item before, cell phones uses lithium batteries that last for about 2-6 hours depending on type of OLED screen. The next generation will use even less energy and possibly last for 8-12 hours, see Samsung.

      3. Yes, see item 1.

      4. No, see item 1.

    2. Re:Bendable screens by dissy · · Score: 3, Informative

      100 volts of electricity to make light that can only be seen in a dark room? Would we be able to power this via a battery for any length of time, and would I get electricuted if I dropped it?

      The fluorescent backlighting in your current laptop requires much more than this to light up right now, usually in the range of 400 - 10000 volts.

      So scale down that voltage to this 'high' voltage of 100v, and compare to your current battery life and frequency of getting shocked when you drop it.

    3. Re:Bendable screens by evanbd · · Score: 4, Informative

      100 volts of electricity to make light that can only be seen in a dark room? Would we be able to power this via a battery for any length of time, and would I get electricuted[sic] if I dropped it?

      Voltage != Power. Power is voltage times current (amps). Increased voltage is not directly connected to power usage, it all depends how much current goes with it. Current CCFL laptop display lights use voltages usually > 1000 volts without any problems with battery life or electrocution hazards.

    4. Re:Bendable screens by Ignorance+Enabled · · Score: 2, Interesting

      Voltage != Power. Power is voltage times current (amps). Increased voltage is not directly connected to power usage, it all depends how much current goes with it. Current CCFL laptop display lights use voltages usually > 1000 volts without any problems with battery life or electrocution hazards.

      We're talking a bendable screen here, and average personal intelligence. I'd never take a laptop anywhere it could get wet, but say I had something resembling a piece of paper--I know I'll end up treating it like one every so often. As things get less klunky, they need to also get more dummy resistant. As an over-obvious example, I wonder how many people accidentally drowned their phones before cell phones came out!... scratch that thought.. the number would be too large for me to maintain my withering dignity.

    5. Re:Bendable screens by Agripa · · Score: 2, Interesting

      Fluorescent tubes are still more efficient then high power LEDs so even with the converter losses and lower efficiency of space constrained cold cathode tubes, it will be still be a while before improved LED technology catches up. Where LEDs really pay off is in smaller form factors where the disadvantage of high voltage wiring and the space needed for the converter can not be accepted. The real gain will happen if any of the emissive technology displays can become viable since they do not have to discard a major portion of their light with filters.

      I have noticed LED back lights becoming available in desktop LCD displays where power is not as significant an issue.

  2. Off Topic/Racist comment by erroneus · · Score: 4, Insightful

    Mark me on this. These fibers will be included in hair weaves and seen frequently in clubs.

    1. Re:Off Topic/Racist comment by OldManAndTheC++ · · Score: 3, Funny

      How is that racist?

      He must be referring to discrimination against light-haired people...

      --
      Soylent Green is peoplicious!
    2. Re:Off Topic/Racist comment by Anonymous Coward · · Score: 3, Funny

      These fibers will be included in hair weaves and seen frequently in clubs.

      Screw that. I want them woven into women's stockings to look like airport landing lights for...

      Oops. I probably shouldn't have said that out loud. Never mind...

  3. alright guys..... by cyberbob2351 · · Score: 3, Funny
    Lets just get the preliminaries out of the way...
    • Will it run linux?
    • Welcome our new nano-pixel hi-res overlords
    • I'm still stuck on CRT technology you insensitive clod!
    --
    for sale
    I'm a self-modifying sig virus
  4. Re:Light by fireslack · · Score: 3, Interesting

    Why not cover an entire wall with this stuff? throw in some nano-speakers for the ultimate home entertainment center.

    --
    This sig only exists because you are observing it.
  5. flexible displays by drDugan · · Score: 2, Interesting

    i want to see curved displays - like a giant earth globe/sphere that is a display, or a mounted movable sphere you can be inside of, with your head at the center that displays inward to the viewer. you run around inside and the globe spins, moving you in a virtual environment - 3D WOW fun!

    1. Re:flexible displays by Nullav · · Score: 3, Informative

      I'm pretty sure you could do that with current technology, as none of that requires anything to actually bend during use. Come to think of it, you can also bend OLED displays.

      --
      I just read Slashdot for the articles.
  6. Clothes by blhack · · Score: 2, Interesting

    I was telling an engineer friend of mine that if she could make clothes that had dynamic writing on them, she would make a fortune. Imagine, a t-shirt that says: GOT ROOT? at one point, and GOT ROOT! at another ;-) Or a tshirt with a short animation playing across it. Instead of riding' spinnaz', rappers could make songs about wearin' scrollaz'!

    --
    NewslilySocial News. No lolcats allowed.
    1. Re:Clothes by Angry+Black+Man · · Score: 2, Interesting
      --
      the byproduct of years of oppression by the white man
  7. Re:I am interested to see how this turns out. by maxume · · Score: 3, Insightful

    But also, they will give us contact lens screens that give us the ability to edit the reality that we see, so you can just paste whatever you want over crazy stupid advertising shirts.

    --
    Nerd rage is the funniest rage.
  8. fashion by Khashishi · · Score: 3, Funny

    Somehow I don't think this will ever be a fashion statement.

  9. Re:World's smallest incandescant bulb? by spitefulcrow · · Score: 2, Informative

    Voltage is not the same thing as power. Power is the product of voltage with current, so these could use a small amount of current at 100 V and not dissipate that much power.

    --
    Sorry, my karma just ran over your dogma.
  10. I don't get it by goombah99 · · Score: 2, Interesting

    1) take any fluorescent or electro luminescent material
    2) put down a drop of it smaller than a wavelength
    3) excite it with UV light or electrons
    4) viola and arbitrarily small light source much smaller than a wavelength

    Coat the tip of any nano fiber this way and it's still true.

    Wha's the big deal? Atoms emit light from source smaller than a wavelength all the time.

    What's tricky is that short of negative index materials you can't propagate light or confine light beyond the near field in areas less than the wavelength squared (or thereabouts). This is not to say that light guides can't be smaller than the wavelength because some guides don't actually confine the light inside.

    TFA does not give me enough info to see if they are beating this last effect.

    --
    Some drink at the fountain of knowledge. Others just gargle.
    1. Re:I don't get it by Anonymous Coward · · Score: 2, Funny

      4) viola and arbitrarily small light source much smaller than a wavelength So, you are saying that violas are a side product of lamps? From the comments on Slashdot I have concluded that there are quite a few processes which produce violas as leftovers. Makes you wonder how it will affect the future of music industry, doesn't it?

      Au revolver, mes amies!
  11. Re:"potentially be used in clothing" by RSKennan · · Score: 2, Informative

    Yeah, people who ride bikes, run, work on the highways, or do just about anything at night where you can get hit by a car would find it useless. I think it would be useful to anyone who wears an orange vest, except for hunters.