Graphene covalently binding aryl groups: Conductivity increases rather than decreases

Ping Huang, Huarui Zhu, Long Jing, Yuliang Zhao, Xueyun Gao

Research output: Contribution to journalArticle

82 Scopus citations

Abstract

Graphene functionalized via nitrophenyl groups covalently bonding to its basal plane is studied by Raman spectroscopy and electric transport measurements. The Raman spectra of functionalized graphene exhibit D mode and peaks derived from nitrophenyl groups, and the two fingerprints exhibit nearly the same distribution in the two-dimensional Raman maps over the whole graphene sheet. This result directly proves that the nitrophenyl groups bond to the graphene basal plane via σ-bonds. Electric transport measurements demonstrate that the modified graphene is significantly more conductive than intrinsic graphene. In the competition between charge transfer effect and scattering effect introduced by the nitrophenyl groups, the former one is dominant so that the conductivity of functionalized graphene is significantly enhanced as a result.

Original languageEnglish (US)
Pages (from-to)7945-7949
Number of pages5
JournalACS Nano
Volume5
Issue number10
DOIs
StatePublished - Oct 25 2011

Keywords

  • conductivity
  • covalently bonding
  • graphene
  • nitrophenyl groups
  • Raman spectrum

ASJC Scopus subject areas

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

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