Direct synthesis of graphene meshes and semipermanent electrical doping

Jaeseok Yi, Dong Hyun Lee, Won Woo Lee, Won Il Park

Research output: Contribution to journalArticle

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Abstract

Here we describe a new method for the direct patterned synthesis of graphene meshes on Cu foils that use self-assembled silica sphere arrays as growth masks. Structural analyses based on electron microscopy and Raman spectroscopy showed that the graphene meshes are mostly single- or double-layer necks with empty holes that have abrupt edges. On the basis of experimental observations, we proposed the model illustrating the dissociation of carbon atoms at the Cu/silica interface through catalytic hydrogenation of the graphene lattice. Moreover, our approach can minimize problems associated with the graphene etching process, including contamination and exposure to reactive plasma. This enables stable electronic doping through covalent C-N bonds at the edges of graphene meshes.

Original languageEnglish
Pages (from-to)2099-2104
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume4
Issue number13
DOIs
Publication statusPublished - 2013 Jul 3

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Keywords

  • graphene
  • mesh structure
  • nitrogen-doping
  • pattering
  • silica sphere

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