Unusual transport characteristics of nitrogen-doped single-walled carbon nanotubes

Yo Sep Min, Eun Ju Bae, Un Jeong Kim, Eun Hong Lee, Noejung Park, Cheol Seong Hwang, Wanjun Park

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

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.

Original languageEnglish
Article number043113
JournalApplied Physics Letters
Volume93
Issue number4
DOIs
StatePublished - 2008

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