Gizmodo Australia » nanotubes

Carbon Nanotube-Coated Threads Make Wearable, Biosensing Electronics

Kit Eaton — Wed, 19 Nov 2008 15:45:00 +0000

Wonder material the carbon nanotube has another new application: A team at the University of Michigan has worked out how to coat cotton threads with a polymer and nanotube mix to produce conductive mini-cables. Conductive threads per se aren’t new, but they generally involve metal which limits their utility—this new material is flexible enough to be woven, won’t corrode, and can carry enough current to light up an LED. Crazily the tubes are also suitable for clinical and chemical biosensing, which could point the way for uses in future military wear. [TechnologyReview]

Nano Silver May Be Envionment’s Silver Bullet

Mark Wilson — Thu, 13 Nov 2008 13:00:00 +0000

The UK’s Royal Commission on Environmental Pollution has recently released a report urging for more study of nano-engineered materials, warning that there is a “major gap” in our knowledge of this technology. We’ve covered the potential dangers of carbon nanotubes here before, but the commission also warns about nano silver, an antibacterial particle that can be found in a variety of clothing, like socks. And in fact, the commission Chair refuses to wear such clothing at all:

I wouldn’t recommend nanosilver clothes and I wouldn’t wear them myself. At the moment the concentrations are way below anything likely to do damage, but if it became common, it could lead to problems.

The big problems could be not just on your body directly, but what happens if the silver leaves the clothing during wash cycles. If the nano silver leaks into our water supply, it could kill good bacteria we need for purification, let alone create havoc through unpredicted effects.

The commission would like to see full disclosure of nanomaterials in manufacturing become mandatory, but they warn it could be 20 years before we have enough data to deem many of these materials safe or hazardous. [BBC via Treehugger]

Nanobama: Barack Obama in Nanotubes

Mark Wilson — Tue, 04 Nov 2008 21:20:00 +0000

A technique known as nanolithography was used to build these Obama faces, combining 150 million carbon nanotubes to construct each individual half-millimeter visage. Depending on your political leanings, the result is either the cutest wittle powitician ever or proof that science, in the wrong hands, will engineer miniature robotic Democrats who distract with a message of hope while eating our flesh. As for the undecideds…I’ll be honest here. I’m so sick of hearing what those dudes “think.” [Flickr via Wired]

Nanotube Speaker Film: Transparent, Stretchy, Likes Moldovan Pop

John Herrman — Tue, 04 Nov 2008 09:15:26 +0000

Scientists at Tsinghua University in Beijing have just perfected a process by which nanotubes can be coaxed to emit sound, allowing for the construction of ultra-thin, transparent, flexible ’speakers’, demonstrated above affixed to a waving flag. Unlike normal speakers, which produce sound with direct vibration, these sheets produce sound with wildly fluctuating temperatures that create pressure oscillations in the surrounding air. In other words, these nanotube speakers — in contrast to other forays into flat sound production — don’t vibrate at all.

In a second demonstration video, the speaker film is shown being stretched, while the emitted sound remains unperturbed. This could have tremendous ramifications for mobile music devices and phones, but the researchers didn’t drop any clues as to when, or even if, this tech could make it to market. [New Scientist via Physorg]

Samsung Demos Carbon Nanotube-Based Colour E-paper

Kit Eaton — Mon, 20 Oct 2008 14:30:00 +0000

Looks like I really wasn’t wrong when I said e-paper is in the news: Samsung’s just demonstrated its own funky e-paper tech, only this time the display uses carbon-nanotube electrode technology—also a technology that’s in the news. The colour carbon nanotube active matrix electrophoretic display (say that after a few pints of beer) works by rearranging charged pigment particles with an electric field, and is one of the first large-scale colour displays of its type. Plus it has the advantage of being flexible as well as demanding low power. And since Samsung’s display is 14.3-inches across, it’s making our dreams of next-gen e-books even more tantalising. [Gizmag]

Carbon Nanotube Manufacturing Breakthrough Could Mean Bye-Bye Steel

Kit Eaton — Tue, 30 Sep 2008 10:07:56 +0000

Carbon nanotubes have been popping on Giz for a while, touted as one of the next wonder-materials—but a new development in their manufacture means they may not remain “future technology” for long. In fact the work of a team at CSIRO and the University of Texas at Dallas means that commercial-scale production of sheets of carbon nanotube “textile” is possible at up to seven metres per minute.

And these are no ordinary textiles either: they’re transparent and way stronger than a sheet of steel. The team’s technique involves chemically-growing “forests” of nanotubes that self-assemble, and is reported in Science currently. If it proves true we may see nanotube materials replacing metals like steel pretty soon—though I’m not sure how many people would balk at flying in a plane with wings you can partly see through. [Physorg]

Japanese Scientists Plan to Build Space Elevator

Kit Eaton — Mon, 22 Sep 2008 14:30:00 +0000

Japanese scientists are so hyped up on the possibilities of building a real life space elevator that in just two months’ time the country is playing host to a conference designed to set a production timetable. Carbon nanotube technology has advanced so rapidly that a material capable of withstanding the amazing forces in the space elevator cable is almost within reach: according to the chairman of the Japan Space Elevator Association it’d only need to be four times stronger than the current strongest nanotube rope.

The potential benefits of accessing space by crawling up a cable versus launching rockets are mind boggling…especially when you realise it could be 100 times cheaper to get there than using a Space Shuttle. But building a more than 36,000km-long carbon rope (or more likely a series of parallel ropes) to connect an Earth-based “launch pad” with a geostationary-orbiting elevator hub still seems a lot like science fiction. Yet it turns out that development of carbon nanotube technology has seen a more than 100 times increase in the fibre strength in the last five years: four times more strength certainly seems possible.

The Space Elevator Association’s director also thinks technology similar to the Bullet train’s could be used to build the elevator cars, since nanotubes can be used as electrical conductors. Lets hope his vision that “just like travelling abroad, anyone will be able to ride the elevator into space” comes true: my savings fund for going aloft in Virgin Galactic is going to take waaaay too long to fill up. [Timesonline]
Picture: HighLift Systems.

Carbon Nanotube Supercapacitors May Replace Clunky Car Batteries

Kit Eaton — Mon, 22 Sep 2008 13:00:00 +0000

Carbon nanotubes are one of the surprising new carbon supermaterials, and it looks like their application in supercapacitors may have a role in replacing clunky old car battery tech. Scientists at the University of Texas at Dallas have invented a technique to make supercapacitor “paper” made from randomly tangled carbon nanotubes embedded in a polymer. Both chemical batteries and capacitors store electrical charge, in differing ways, but nanotech supercapacitors could store more energy in a smaller space, without the dangers associated with chemical systems. Potentially excellent news given the rise of the hybrid car. Better yet the new technique is “easily scalable for device fabrication on an industrial scale,” so it might end up in real products sooner rather than later. [Physorg]

Nanotubes Could Make For Bouncy Cellphones: I’m Talkin’ to You Butterfingers

Sean Fallon — Thu, 14 Aug 2008 22:20:00 +0000

Ah nanotubes. Is there anything you can’t almost possibly do? Well, now you can add bouncy mobile phones to the list because a team of Clemson University researchers have developed a way to make beds of tiny, shock-absorbing coiled carbon nanotubes which could be used to cushion objects from damaging impacts. They hope that these coiled nanotubes could be used in everything from body armour to mobile phones in the near future.

Coiled nanotubes are nothing new, but the real breakthrough for the Clemson team has come in the production process. The problem was that no one had developed a way to make these nanotubes in a substantial quantity at an reasonable price. Their new method can mass produce the nanotubes in a single step using proprietary hydrocarbon-catalyst mixture. After forming, these beds can be peeled off and slapped onto an object to create an instant layer of protection. As promising as all this sounds, it will have to be relegated to the “only time will tell” pile until actual products start rolling out. [Science Daily]

New Material Stretches While Conducting Electricity

Mark Wilson — Fri, 08 Aug 2008 13:18:00 +0000

Japanese researchers have developed a new material capable of stretching to roughly twice its natural shape while conducting electricity—before snapping back with no damage to the circuit. It’s essentially a rubber polymer filled with carbon nanotubes, and it could be used to create anything from a curved eye-replacement camera (which is currently in development) to a new class of NERF footballs. So are you thinking what we’re thinking? Yes, bring on the prank Silly Putty. And who’s the sicko pasting T1000 shots on my friendly post? [Reuters via Newlaunches]