segunda-feira, 3 de agosto de 2015

Nanotech on Display



South Korea’s Samsung leads the race to perfect flat-panel TVs built with carbon nanotubes. Will they be nanotech’s first commercial hit?

By Charles C. Mann - 2004 

In the Samsung Advanced Institute of Technology, south of Seoul, South Korea, what looks from a distance like an ordinary 38-inch television plays an endless loop of commercials for James Bond movies. Like the displays increasingly common in American homes, it is a big, flat rectangle of color and motion in a high-tech plastic frame. But unlike the images on an ordinary TV, the ones on this lab model are generated by a layer of carbon nanotubes shooting electrons at a phosphor screen like so many tiny cannonballs. Around the world, television screens are emblems of stodgy domesticity. But this one is in the vanguard of tomorrows nanotechnological revolution: it could be the first commercial product that brings nanoscale electronics into the middle-class home.

Researchers around the world are racing to perfect this novel type of display, which should be brighter, sharper, and less power-hungry than current flat-panel TVs. For the moment, though, the Samsung institute appears to have the lead. They are the ones to beat, says Yahachi Saito, lead researcher of a rival group at Nagoya University in Japan. They have moved very quickly.

Samsung, and South Korean technology firms in general, are rarely thought of as the leading developers of hot new technologies. This is a stereotype, however, that the company is determined to change. We are still identified, correctly, with low-cost manufacturing, says Young Joon Gil, chief technology officer at the Samsung institute. But as competitors emerge from China and other east-Asian countries, he says, Samsung must gradually move to high-profit, high-risk innovation to survive.

Nanotechnology is the most important of the risky disciplines the company hopes to mine for new products, and the nanotube TV screens are its first fruits. Known as field emission displays, they should be in stores, Young says, by the end of 2006, comfortably ahead of the competition.

Meeting that prediction will not be easy. Simply taking field emission displays from the laboratory to the retail floor will require solving a host of tough technical problems. Moreover, current flat-panel displays, based on liquid-crystal and plasma technology, are constantly becoming better and cheaper, meaning nanotech researchers will have to work harder just to keep up. Even success would create its own set of problems, since Samsungone of the worlds leading manufacturers of liquid-crystal and plasma displays, as well as ordinary cathode-ray-tube TVswill be competing against itself.

Nanotech displays are thus both a harbinger of a technological revolution to come and an example of how a major electronics companywith lucrative, established markets to protectis trying to manage and contain that revolution. We believe we must master this field to grow, Young says. But at the same time we cannot let it wreck our company. We have to watch very carefully.

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