Efficient reduction of graphene oxide catalyzed by copper

Yu Chuan Lin, Keng Ku Liu, Chih Yu Wu, Chih Wei Chu, Jacob Tse Wei Wang, Chi Te Liang*, Lain Jong Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We report that copper thin films deposited on top of graphene oxide (GO) serve as an effective catalyst to reduce GO sheets in a diluted hydrogen environment at high temperature. The reduced GO (rGO) sheets exhibit higher effective field-effect hole mobility, up to 80 cm 2 V -1 s -1, and lower sheet resistance (13 kΩ □ -1) compared with those reduced by reported methods such as hydrazine and thermal annealing. Raman and XPS characterizations are addressed to study the reduction mechanism on graphene oxide underneath copper thin films. The level of reduction in rGO sheets is examined by Raman spectroscopy and it is well correlated with hole mobility values. The conductivity enhancement is attributed to the growth of the graphitic domain size. This method is not only suitable for reduction of single GO sheets but also applicable to lower the sheet resistance of Langmuir-Blodgett assembled GO films.

Original languageEnglish (US)
Pages (from-to)3083-3088
Number of pages6
JournalPhysical Chemistry Chemical Physics
Issue number9
StatePublished - Feb 28 2012
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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