Nitrogen-doped graphene: beyond single substitution and enhanced molecular sensing

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書誌事項

公開日
2012-08-17
権利情報
  • https://creativecommons.org/licenses/by-nc-nd/3.0/
  • https://creativecommons.org/licenses/by-nc-nd/3.0/
DOI
  • 10.1038/srep00586
公開者
Springer Science and Business Media LLC

説明

Graphene is a two-dimensional network in which sp(2)-hybridized carbon atoms are arranged in two different triangular sub-lattices (A and B). By incorporating nitrogen atoms into graphene, its physico-chemical properties could be significantly altered depending on the doping configuration within the sub-lattices. Here, we describe the synthesis of large-area, highly-crystalline monolayer N-doped graphene (NG) sheets via atmospheric-pressure chemical vapor deposition, yielding a unique N-doping site composed of two quasi-adjacent substitutional nitrogen atoms within the same graphene sub-lattice (N(2)(AA)). Scanning tunneling microscopy and spectroscopy (STM and STS) of NG revealed the presence of localized states in the conduction band induced by N(2)(AA)-doping, which was confirmed by ab initio calculations. Furthermore, we demonstrated for the first time that NG could be used to efficiently probe organic molecules via a highly improved graphene enhanced Raman scattering.

収録刊行物

  • Scientific Reports

    Scientific Reports 2 (1), 586-, 2012-08-17

    Springer Science and Business Media LLC

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