Highly efficient restoration of graphitic structure in graphene oxide using alcohol vapors

Ching Yuan Su, Yanping Xu, Wenjing Zhang, Jianwen Zhao, Aiping Liu, Xiaohong Tang, Chuen Horng Tsai, Yizhong Huang, Lain-Jong Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

233 Scopus citations


Solution-based processes involving the chemical oxidation of graphite and reduction of the obtained graphene oxide (GO) sheets have attracted much attention for preparing graphene films for printed electronics and biosensors. However, the low electrical conductivity of reduced GO is still hindering the development of electronic applications. This article presents that GO sheets reduced by high-temperature alcohol vapors exhibit highly graphitic structures and excellent electrical conductivity. The sheet resistance of thin transparent films is lowered to ∼15 kω/□ (>96% transparency). Field-effect transistors produced from these reduced GO sheets exhibit high effective field-effect hole mobility up to 210 cm2/V·s. Raman spectroscopic studies reveal that the conductivity enhancement in the low mobility regime is attributed to the removal of chemical functional groups and the formation of six-fold rings. In the high mobility regime, the growth of the graphitic domain size becomes dominant for enhancing its electrical conductivity. The excellent electrical conductivity of the reduced GO sheets promises potential electronic applications.

Original languageEnglish (US)
Pages (from-to)5285-5292
Number of pages8
JournalACS Nano
Issue number9
StatePublished - Sep 28 2010


  • Raman spectroscopy
  • graphene oxide
  • transistors
  • transparent conducting electrodes

ASJC Scopus subject areas

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


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