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New Fabrication Method Creates Large, Affordable Flexible Displays

A new method for printing large areas of carbon nanotube thin-film transistors on plastic surfaces would enable the creation of flexible displays and sensor networks. Researchers, led by Ali Javey, professor of electrical engineering and computer science at the University of California, Berkeley, used a conventional printing technology known as gravure printing to make uniform arrays of high-performing transistors from carbon nanotubes on flexible plastic sheets. This is the first time fully printed carbon nanotubes that are also high performance have been demonstrated. They report that their method creates transistor arrays with higher mobility than other, prior carbon nanotube printing technologies. Electron mobility is critical in display technologies. It translates into needing less current for OLEDs, for example. Researchers say the process could lead to  manufacturing large-area, low-power sensor arrays and displays using roll-to-roll printing and are now working on refining their method in hopes of printing more complex circuits. They published their findings in NanoLetters. (Technology Review)(NanoLetters)

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