Highly conductive graphene nanoribbons by longitudinal splitting of carbon nanotubes using potassium vapor

Dmitry V. Kosynkin, Wei Lu, Alexander Sinitskii, Gorka Pera, Zhengzong Sun, James M. Tour

Research output: Contribution to journalArticle

175 Scopus citations

Abstract

Here we demonstrate that graphene nanoribbons (GNRs) free of oxidized surfaces can be prepared in large batches and 100% yield by splitting multiwalled carbon nanotubes (MWCNTs) with potassium vapor. If desired, exfoliation is attainable in a subsequent step using chlorosulfonic acid. The low-defect density of these GNRs is indicated by their electrical conductivity, comparable to that of graphene derived from mechanically exfoliated graphite. The possible origins of directionally selective splitting of MWCNTs have been explored using computer modeling, and plausible explanations for the unique role of potassium were found.

Original languageEnglish (US)
Pages (from-to)968-974
Number of pages7
JournalACS Nano
Volume5
Issue number2
DOIs
StatePublished - Feb 22 2011

Keywords

  • chlorosulfonic acid
  • exfoliation
  • graphene nanoribbons
  • potassium

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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