Open AccessUnusual transport characteristics of nitrogen-doped single-walled carbon nanotubes
Author(s) -
YoSep Min,
Eun Ju Bae,
Un Jeong Kim,
Eun Hong Lee,
Noejung Park,
Cheol Seong Hwang,
Wanjun Park
Publication year - 2008
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 - 10.1063/1.2965805
Subject(s) - dopant , ambipolar diffusion , carbon nanotube , materials science , nitrogen , doping , fermi level , carbon fibers , electrical resistivity and conductivity , field effect transistor , nanotechnology , chemical physics , transistor , chemistry , optoelectronics , composite material , composite number , physics , organic chemistry , plasma , quantum mechanics , electron , voltage
Electrical transport characteristics of nitrogen-doped single-walled carbon nanotubes (N-SWCNTs), in which the nitrogen dopant is believed to form a pyridinelike bonding configuration, are studied with the field effect transistor operations. Contrary to the expectation that the nitrogen atoms may induce a n -type doping, the electrical transports through our N-SWCNTs are either ambipolar in vacuum or p -type in air. Through the first-principles electronic structure calculations, we show that the nitrogen dopant indeed favors the pyridinelike configuration and the Fermi level of the pyridinelike N-SWCNT is almost at the intrinsic level.open01
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