Doping and dedoping in SWCNT film by the spontaneous redox process

Dong Wook Shin, Xianhui Meng, Jong Hak Lee, Seong Man Yu, Jin Hyoung Yoo, Kwang Soo Lim, Shashikant P. Patole, Ji Beom Yoo

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Single-walled carbon nanotube (SWCNT) film was deposited with MnO 2 using a spontaneous redox reaction between MnO4 ̄ ions and the SWCNTs. Doping and dedoping had a significant effect on the sheet resistance of the resulting SWCNT film. The injection of holes in the SWCNT film bleached the van Hove singularity transitions (E 11S) observed by optical absorption spectroscopy. The observed doping was not permanent, and spontaneous reduction under ambient conditions restored the defects and dedoped the SWCNT film. Dedoping increased the Fermi level and restored the van Hove singularity transitions (E11S). The doping and dedoping mechanism of these films was investigated. Transmission electron microscopy, X-ray photoelectron spectroscopy, and optical transmission spectroscopy were used to characterize the films.

Original languageBritish English
Pages (from-to)18327-18332
Number of pages6
JournalJournal of Physical Chemistry C
Volume115
Issue number37
DOIs
StatePublished - 22 Sep 2011

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