Electrochemistry of well-defined graphene samples: role of contaminants

Hollie V. Patten, Matej Velicky, Nick Clark, Christopher Muryn, Ian A Kinloch, Robert Dryfe

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    Abstract

    We report the electrochemical characterisation of well-defined graphene samples, prepared by mechanical exfoliation. Mechanical exfoliation is the method of choice for high purity graphene samples, despite the inherent complexity of the approach and the small scale of the resultant flakes. However, one important, yet presently unclear area, is the role of adsorbates such as processing residue, on the properties of the graphene layer. We report high resolution microscopic and electrochemical characterisation of a variety of poly(methyl methacrylate) (PMMA) transferred graphene samples, with the explicit aim of investigating the relationship between electrochemical activity and sample purity.
    Original languageEnglish
    Pages (from-to)261-272
    Number of pages12
    JournalFaraday Discussions
    Volume172
    DOIs
    Publication statusPublished - 2014

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