"A physicist has made the best ever p-n junction diode from a carbon nanotube. The current-voltage characteristics of the device exhibit an "ideality factor" of one, which is the maximum possible value for any diode. The new diode could have applications in electronics, sensors and photovoltaics (Appl. Phys. Lett. 87 073101)."
Carbon nanotubes are rolled up sheets of graphite just nanometres in diameter. As a promising alternative to silicon they have been used to fabricate a variety of electronic components, including diodes and field-effect transistors. I believe nanotubes have great potential to be one future of electronic materials.
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