Doping single-layer graphene with aromatic molecules

Xiaochen Dong, Dongliang Fu, Wenjing Fang, Yumeng Shi, Peng Chen*, Lain-Jong Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

469 Scopus citations

Abstract

A study was conducted to demonstrate the preparation of single-layer graphene (SLG) films through mechanical exploitation of highly oriented pyrolytic graphite (HOPG) and modify them with various aromatic molecules. It was found that the molecules bound to SLG films through strong π-π interactions between their aromatic rings and the graphene. Electrical measurements on SLG-based field-effect transistors revealed that the aromatic molecules with electron-donating groups caused n-doping, while those with electron-withdrawing groups imposed p-doping on the SLG. The doping effect by these aromatic molecules were characterized by Raman spectroscopy. Itv was suggested that the charge impurity or ripping on the SLG film had the potential to cause an inhomogeneous charge distribution that led to variations of Raman features.

Original languageEnglish (US)
Pages (from-to)1422-1426
Number of pages5
JournalSmall
Volume5
Issue number12
DOIs
StatePublished - Jun 19 2009

Keywords

  • Aromatic molecules
  • Doping
  • Field-effect transistors
  • Graphene
  • Raman spectroscopy

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

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