Adsorption-induced conversion of the carbon nanotube field effect transistor from ambipolar to unipolar behavior
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- Adsorption-induced conversion of the carbon nanotube field effect transistor from ambipolar to unipolar behavior
- Kang, DH; Park, Noejung; Hyun, JW; Bae, EJ; Ko, JY; Kim, JJ; Park, WJ
- Issue Date
- AMER INST PHYSICS
- APPLIED PHYSICS LETTERS, v.86, no.9, pp. -
- We investigate ambipolar to unipolar transition by the effect of ambient air on the carbon nanotube field-effect transistor. A unipolar transport property of the double-walled nanotube field-effect transistor and its conversion from ambipolar behavior are observed. We suggest that adsorptions of oxygen molecules, whose lowest-unoccupied-molecular-orbital state is around the midgap of the carbon nanotube, could suppress the electron channel formation and, consequently, result in the unipolar transport behavior.
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