On-chip diameter-dependent conversion of metallic to semiconducting single-walled carbon nanotubes by immersion in 2-ethylanthraquinone

Jiangbo Li, Xuena Luan, Yinxi Huang, Simon Dunham, Peng Chen*, John A. Rogers, Mary B. Chan-Park

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The key hurdle to the practical use of as-grown single-walled carbon nanotubes (SWNTs) for high performance nanoelectronics is the unavoidable presence of metallic nanotubes with current synthesis methods. We present a simple approach to convert metallic SWNTs to semiconducting ones in situ to improve device field effect behaviour, using an aromatic compound (2-ethylanthraquinone - EAQ) which is a mild radical initiator. We show that the reaction between EAQ-generated radicals and SWNTs is diameter and metallicity dependent; in the medium-diameter regime (0.8 to 1.0 nm), the EAQ-generated radicals preferentially attack the metallic SWNTs over semiconducting ones and convert them to semiconducting, as evidenced by several orders (10 and 10 4) increase in the on/off ratio.

Original languageEnglish (US)
Pages (from-to)1275-1281
Number of pages7
JournalRSC Advances
Volume2
Issue number4
DOIs
StatePublished - Feb 21 2012

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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