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Scientists have demonstrated methods that could see higher-performance computer chips made from tiny straws of carbon called nanotubes.
Carbon nanotubes have potential in the development of high-speed and power-efficient logic applications. However, for such technologies to be viable, a high density of semiconducting nanotubes must be placed at precise locations on a substrate.
Here, we show that ion-exchange chemistry can be used to fabricate arrays of individually positioned carbon nanotubes with a density as high as 1 × 109 cm−2—two orders of magnitude higher than previous reports.
With this approach, we assembled a high density of carbon-nanotube transistors in a conventional semiconductor fabrication line and then electrically tested more than 10,000 devices in a single chip.
The ability to characterize such large distributions of nanotube devices is crucial for analysing transistor performance, yield and semiconducting nanotube purity.
More here:
http://www.bbc.co.uk/news/science-environment-20086402
http://www.nature.com/nnano/journal/vaop/ncurrent/full/nnano.2012.189.html
Carbon nanotubes have potential in the development of high-speed and power-efficient logic applications. However, for such technologies to be viable, a high density of semiconducting nanotubes must be placed at precise locations on a substrate.
Here, we show that ion-exchange chemistry can be used to fabricate arrays of individually positioned carbon nanotubes with a density as high as 1 × 109 cm−2—two orders of magnitude higher than previous reports.
With this approach, we assembled a high density of carbon-nanotube transistors in a conventional semiconductor fabrication line and then electrically tested more than 10,000 devices in a single chip.
The ability to characterize such large distributions of nanotube devices is crucial for analysing transistor performance, yield and semiconducting nanotube purity.
More here:
http://www.bbc.co.uk/news/science-environment-20086402
http://www.nature.com/nnano/journal/vaop/ncurrent/full/nnano.2012.189.html