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Nano Lett. 2011 Apr 13;11(4):1782-5. doi: 10.1021/nl200371z. Epub 2011 Mar 17.

A fully tunable single-walled carbon nanotube diode.

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Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109, United States.


We demonstrate a fully tunable diode structure utilizing a fully suspended single-walled carbon nanotube. The diode's turn-on voltage under forward bias can be continuously tuned up to 4.3 V by controlling gate voltages, which is ∼6 times the nanotube band gap energy. Furthermore, the same device design can be configured into a backward diode by tuning the band-to-band tunneling current with gate voltages. A nanotube backward diode is demonstrated for the first time with nonlinearity exceeding the ideal diode. These results suggest that a tunable nanotube diode can be a unique building block for developing next generation programmable nanoelectronic logic and integrated circuits.

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