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Nano Research

, Volume 7, Issue 6, pp 835–843 | Cite as

Single step fabrication of N-doped graphene/Si3N4/SiC heterostructures

  • Emilio Vélez-Fort
  • Emiliano Pallecchi
  • Mathieu G. Silly
  • Mounib Bahri
  • Gilles Patriarche
  • Abhay Shukla
  • Fausto Sirotti
  • Abdelkarim OuerghiEmail author
Research Article

Abstract

In-plane heteroatom substitution of graphene is a promising strategy to modify its properties. The ability to dope graphene with electron-donor nitrogen heteroatoms is highly important for modulating electrical properties of graphene. Here we demonstrate a transfer-free method to directly grow large area quasi free-standing N-doped graphene bilayers on an insulating substrate (Si3N4). Electron-bombardment heating under nitrogen flux results in simultaneous growth of N-doped graphene and a Si3N4 layer on the SiC surface. The decoupling of N-doped graphene from the substrate and the presence of Si3N4 are identified by X-ray photoemission spectroscopy and low-energy electron diffraction. The substitution of nitrogen atoms in the graphene planes was confirmed using high resolution X-ray photoemission spectroscopy which reveals several atomic configurations for the nitrogen atoms: Graphitic-like, pyridine-like, and pyrroliclike. Furthermore, we demonstrated for the first time that N-doped graphene could be used to efficiently probe oxygen molecules via nitrogen atom defects.

Keywords

epitaxial graphene spectroscopy nitrogen-doped graphene low-energy electron microscopy electronic properties 

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Emilio Vélez-Fort
    • 1
    • 2
  • Emiliano Pallecchi
    • 1
  • Mathieu G. Silly
    • 3
  • Mounib Bahri
    • 1
  • Gilles Patriarche
    • 1
  • Abhay Shukla
    • 2
  • Fausto Sirotti
    • 3
  • Abdelkarim Ouerghi
    • 1
    Email author
  1. 1.CNRS-Laboratoire de Photonique et de Nanostructures (LPN)MarcoussisFrance
  2. 2.Université Pierre et Marie Curie (CNRS — IMPMC)ParisFrance
  3. 3.Synchrotron-SOLEIL, Saint-AubinGif sur Yvette CedexFrance

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