Effect of charge puddles and ripples on the chemical reactivity of single layer graphene supported by SiO2/Si substrate

Xiaoyan Fan, Ryo Nouchi, Katsumi Tanigaki

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Graphene fabricated on a SiO2/Si substrate by mechanical exfoliation has two features: one is charge (electron and hole) puddles which inhomogeneously distribute on graphene flakes, and the other is ripples which exist in two-dimensional crystals. The effects of these two features on the chemical reactivity of graphene flakes toward the charge transfer chemistries with nitrobenzene diazonium tetrafluoroborate are explored by Raman spectroscopy. The results indicate that the electron puddles and more corrugated regions possess enhanced chemical reactivity. The anomalously large reactivity of single layer graphene as compared to multilayer graphene can be the combined action of these two factors.

Original languageEnglish
Pages (from-to)12960-12964
Number of pages5
JournalJournal of Physical Chemistry C
Volume115
Issue number26
DOIs
Publication statusPublished - 2011 Jul 7

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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