Adsorption-induced conversion of the carbon nanotube field effect transistor from ambipolar to unipolar behavior | Zendy

DongHun Kang | Zendy; Noejung Park | Zendy; Jaewoong Hyun | Zendy; Eunju Bae | Zendy; JuHye Ko | Zendy; Jinhee Kim | Zendy; Wanjun Park | Zendy

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Adsorption-induced conversion of the carbon nanotube field effect transistor from ambipolar to unipolar behavior

Author(s) -

DongHun Kang,

Noejung Park,

Jaewoong Hyun,

Eunju Bae,

JuHye Ko,

Jinhee Kim,

Wanjun Park

Publication year - 2005

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1869548

Subject(s) - ambipolar diffusion , carbon nanotube , carbon nanotube field effect transistor , field effect transistor , materials science , nanotube , carbon nanotube quantum dot , transistor , nanotechnology , chemical physics , optoelectronics , electron , chemistry , electrical engineering , physics , quantum mechanics , voltage , engineering

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.open343

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