Deposition of an Ultraflat Graphene Oxide Nanosheet on Atomically Flat Substrates

M. Z.H. Khan, S. M.F. Shahed, Yuta Nishina, T. Komeda

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this study, graphene oxide (GO) sheets produced in the form of stable aqueous dispersions were deposited on Au (111), freshly cleaved mica, and highly oriented pyrolytic graphite (HOPG) substrates. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to study the presence and distinct contact of GO sheets on the substrates. It was revealed from the topography images that high-quality ultraflat GO monolayer sheets formed on the substrates without distinct cracking/wrinkling or folding. GO sheets with apparent height variation observed by microscopy also indicate ultraflat deposition with clear underlying steps. It was observed that ultrasonication and centrifuge steps prior to deposition were very effective for getting oxidation debris (OD)-free ultraflat single monolayer GO nanosheets onto substrates and that the process depends on the concentration of supplied GO solutions.

Original languageEnglish
Pages (from-to)4160-4165
Number of pages6
JournalJournal of Electronic Materials
Volume46
Issue number7
DOIs
Publication statusPublished - Jul 1 2017

Keywords

  • AFM
  • atomically flat substrates
  • Graphene oxide
  • nanosheets
  • SEM
  • surface properties

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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