Observations of early stage graphene growth on copper

K. Celebi, Matthew Cole, Kenneth B.K. Teo, H. G. Park

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We present our observations made during the early stages of graphene growth employing an ethylene-based CVD method capable of synthesizing copper-foil-catalyzed monolayer graphene at temperatures as low as 800°C. Spectroscopic monitoring of surface catalysis showed that graphene crystals evolve from densely distributed nucleation points that interconnect to form large crystals covering the entire surface. Secondary nucleation was observed inside the primary graphene crystals. An effective activation energy for copper-catalyzed ethylene-based graphene synthesis was determined to be 2.46 eV, a value that suggests surface dehydrogenation of ethylene or lattice integration of graphene as the possible rate-determining step in the heterogeneous catalysis.

Original languageEnglish
Pages (from-to)K1-K4
JournalElectrochemical and Solid-State Letters
Volume15
Issue number1
DOIs
Publication statusPublished - 18 Nov 2011

ASJC Scopus subject areas

  • Electrochemistry
  • Electrical and Electronic Engineering
  • Materials Science(all)
  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

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