Spectroscopic characterization of single-walled carbon nanotubes carrier-doped by encapsulation of TCNQ

Masashi Shiraishi, Sufal Swaraj, Taishi Takenobu, Yoshihiro Iwasa, Masafumi Ata, Wolfgang E S Unger

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Tetracyano-p-quinodimethane (TCNQ) molecules encapsulated single-walled carbon nanotubes (SWNTs) were investigated by using core level and valence band x-ray photoemission spectroscopy as well as near-edge x-ray-absorption fine structure spectroscopy. The π-band and π*-band structures in these molecular systems were investigated, and it was clearly confirmed that a charge transfer occurred in TCNQ-doped SWNTs. TCNQ molecules were negatively charged as to be expected. A depletion of the π-band density of states of the SWNTs caused by the charge transfer to the TCNQ molecules was observed.

Original languageEnglish
Article number125419
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number12
DOIs
Publication statusPublished - 2005 Mar 15
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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