Light Emitting Carbon Nanotubes - New Technology

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Nov 28 2003

Researchers from IBM have found a way to make carbon nanotubes emit light, and have made a nanotube transistor that emits 1.5-micron infrared light for use in telecommunications.

Carbon nanotubes are already used as wires to carry electricity and transistors to control electric current but light-emitting nanotubes could be used to form efficient communications devices and optical computer chips.

By injecting electrons into one end of a nanotube, and holes, or positive charges, into the other end, researchers found that the two combine to emit light with a wavelength inversely proportional to the tube's diameter.

Posted 7^th May 2003

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