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Posts with tag CarbonNanotubes

Networks of carbon nanotubes find use in flexible displays

Carbon nanotubes may very well kill you (okay, so that's very much a stretch), but you'll have a hard time convincing the dutiful scientists at the University of Illinois at Urbana-Champaign to stop their promising research. Put simply (or as simply as possible), said researchers have discovered that "networks of single-walled carbon nanotubes printed onto bendable plastic perform well as semiconductors in integrated circuits." So well, in fact, that the nanotube networks could one day "replace organic semiconductors in applications such as flexible displays." Granted, there is still much to do before these networks are ready for product integration, but you can bet these folks aren't hitting the brakes after coming this far.

Japanese scientists craft planet's smallest ramen bowl


Now that just looks extra scrumptious, doesn't it? What you're peering at above is believed to be the world's tiniest ramen bowl, created by a clever bunch of scientists from the University of Tokyo. Reportedly, Masayuki Nakao and his students "used a carbon-based material to produce a noodle bowl with a diameter 1 / 25,000 of an inch in a project aimed at developing nanotube-processing technology." In other words, they carved a bowl out of nanotubes, which can now only be viewed through a microscope. Best of all, they didn't stop with just the dinnerware, as they managed to insert a number of inedible noodles to round things off -- each of which measured "one-12,500th of an inch in length with a thickness of one-1.25 millionth of an inch." Don't get any bright ideas here, McDonald's, ditching SuperSize was bad enough.

Graphene-polymer hybrid composites look to oust carbon nanotubes

We're pretty certain the world's big enough for the both of 'em, but a graphene-polymer hybrid developed by a brilliant team from Northwestern University could prove to be a suitable -- and much cheaper -- alternative to polymer-infused carbon nanotubes. Put simply, graphite can be purchased for dollars per pound, while single-walled nanotubes are hundreds of dollars per gram. A breakthrough has found that tough, lightweight materials can be created by "spreading a small amount of graphene, a single-layer flat sheet of carbon atoms, throughout polymers," and these composites could eventually be used to make lighter car and airplane parts (among other things). We won't kid you, there's a lot of technobabble in the read link below, but it's well worth the read if your inner nerd is up for it.

Carbon nanotubes causing asbestos-like effects in lab mice

The scientific and engineering possibilities of carbon nanotubes are hard to overestimate, but a study out of the UK might put a damper on the small-scale party for a while: mice injected with certain lengths of nanotubes developed lung problems similar to those caused by asbestos. Apparently the long, straight shape of the nanotubes causes problems for the lining of the lungs designed to deal with particulate matter, which can cause scarring, inflammation, and "probably cancer in the long term." That's a big "probably," however -- researchers say they're a long way from actually proving the link between long nanotubes and cancer, but no one's denying that it's troublesome, including the Nanotechnology Industries Association, which told the BBC that "there could be reason for concern... but it needs to be validated." It also seems like the focus is on handling the tech correctly, which is promising -- we'll keep an eye on how this plays out.

[Thanks, TC]

UCLA researchers create self-healing, power-generating artificial muscle


We've seen self-healing materials and artificial arms, but a team of researchers hailing from UCLA have taken two fabulous ideas and wed them together to create "an artificial muscle that heals itself and generates electricity." Put simply, the contracting / expanding of the material can generate a small electric current, which can be "captured and used to power another expansion or stored in a battery." The scientists have relied on carbon nanotubes as electrodes rather than metal-based films that typically fail after extended usage, and in an ideal world, the research could eventually lead to (more) walking robots and highly advanced prosthetics. Integrate an AC adapter in there and we're sold.

[Via CNET]

Boron nanotubes beat carbon at its own game

If 2007 was the year of the carbon nanotube, it looks like 2008 could be the year for boron nanotubes to shine. Carbon nanotubes have been sprouting up in all sorts of tech that requires strong building blocks and fast electronics at the microscopic scale, but boron nanotubes, which were discovered in 2004, are looking even better at electronics, while matching carbon in the strength department. Researchers at Tsinghua University in Beijing, China have proved in simulation that the boron nanotubes can have variable electrical properties, which could make boron the jack of all trades at the nano scale, but that's about as far as we go with this whole "science" thing. Bill Nye would be so disappointed in us.

Berkeley researchers develop world's smallest radio


Move over, UC Irvine: your colleagues across the state at UC Berkeley have just one-upped your nano-scale radio by not only using nanotechnology for the demodulator, but actually "stuffing" all the components into a single carbon nanotube. By utilizing mechanical -- rather than electrical -- vibrations of a nanotube protruding from an electrode, the team from Berkeley and the Lawrence Berkeley National Laboratory were able to mimic the tuner, antenna, amplifier, and demodulator which compose traditional radios. Their prototype nano-radio, 10,000 times thinner than a human hair, has already been used to broadcast and receive such classic tunes as Good Vibrations by the Beach Boys and Eric Clapton's Layla; a video of this latter transmission, whose poor quality will make you long for the relative clarity of AM radio, is available after the break...

[Via San Francisco Chronicle, image and video courtesy of Zettl Research Group, Lawrence Berkeley National Laboratory and University of California at Berkeley]

Nanotube breakthrough creates scalable transistors


Nanotubes have certainly played their part in various forms of swank gadgetry over the years, but researchers at the University of Illinois, Lehigh University, and Purdue University seem to have upped the ante for future nanotube implementations. Their approach utilizes "dense arrays of aligned and linear nanotubes as a thin-film semiconductor material suitable for integration into electronic devices," which essentially means that the arrays can be transferred into devices where silicon isn't entirely comfortable, such as "flexible displays, structural health monitors, and heads-up displays." Interestingly, the creators aren't expecting their discovery to overtake silicon, but they did mention that the linear arrays could be "added to a silicon chip and exploited for particular purposes, such as higher speed operation, higher power capacity, and linear behavior for enhanced functionality." Sounds like these gurus are just the type Intel would be scouting right about now, eh?

[Via TechnologyReview]

Intel researching "carbon nanotubes" for chip design

While Moore's Law has held up pretty well over the last 40 years, it may not be able to stay true forever. It turns out that as the components inside semiconductors get smaller and smaller, electrical resistance goes up, thereby reducing performance; experts say that eventually there will be a breaking point for "copper interconnects," reaching the point where Moore's Law falls apart. Scientists have been well aware of this roadblock, and have invested heavily in everything from quantum computing to optical processors. Intel is also working on a solution for this electrical engineering problem by attempting to determine whether these semiconductor interconnects can be replaced by carbon nanotubes. The ubiquitously researched microscopic tubes can conduct electricity far better than metals, due to their "ballistic conductivity," a property where no electrons are dispersed or blocked. But, the problem with carbon nanotubes, as CNET reports, is that they're really tough to mass produce; once created, some act as great semiconductors, while others don't. So now, Intel has to figure out how to get carbon nanotubes to act more uniformly, or to separate the bad ones from the good. Thankfully, consumers won't have to worry about this problem for about another decade, which is why Intel has brainiacs working on a solution as we speak.

[Via Slashdot]

Carbon nanotubes manage 1080p on a 0.7-inch microdisplay

We can't say it was love at first sight for us and carbon nanotube displays, with the first screen cap resembling a Lite-Brite a lot better than a next generation display technology. Well, now we're ready to give this nano tech another chance, since Syscan Imaging has just managed to squeeze a 1920 x 1080 resolution onto a 0.7-inch LCoS microdisplay for use in projection TVs. It's even at a lower cost than competing technologies, and should hopefully overcome some of the current problems with the low yields and color inconsistencies of LCoS. Carbon nanotube displays also run cooler and have zero ghosting, so we're pretty stoked, but we'll have to wait until 2007 for these to make it to shelves.

[Via HD Beat]



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