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April 24th, 2008
A team of US scientists at Duke University in the USA say they have brought the commercial utilisation of carbon nanotubes in ICs a step further by using IC-like masking processes to align arrays of nanotubes.
"To the best of our knowledge, it is the highest density of aligned, single-wall nanotubes reported," the researchers, led by Professor Jie Liu, wrote in the Journal of the American Chemical Society.
Ten nanotubes, a few atoms thick and all facing in the same direction with none of them crossing, were grown in a micron-wide space.
"Compared with what other people have done, we have reached a higher density of nanotubes," said Liu.
The problem with nanotubes, up to now, has been getting them to grow straight, long enough and sufficiently densely packed to be practical for carrying current. Nanotubes tend to bend and overlap each other as they extend.
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