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Formation of nitrogen-doped graphene nanoscrolls by adsorption of magnetic γ-Fe2O3 nanoparticles

Author

Listed:
  • Tiva Sharifi

    (Umeå University)

  • Eduardo Gracia-Espino

    (Umeå University
    Umeå University)

  • Hamid Reza Barzegar

    (Umeå University)

  • Xueen Jia

    (Umeå University)

  • Florian Nitze

    (Umeå University)

  • Guangzhi Hu

    (Umeå University)

  • Per Nordblad

    (Uppsala University)

  • Cheuk-Wai Tai

    (Arrhenius Laboratory, Stockholm University)

  • Thomas Wågberg

    (Umeå University)

Abstract

Graphene nanoscrolls are Archimedean-type spirals formed by rolling single-layer graphene sheets. Their unique structure makes them conceptually interesting and understanding their formation gives important information on the manipulation and characteristics of various carbon nanostructures. Here we report a 100% efficient process to transform nitrogen-doped reduced graphene oxide sheets into homogeneous nanoscrolls by decoration with magnetic γ-Fe2O3 nanoparticles. Through a large number of control experiments, magnetic characterization of the decorated nanoparticles, and ab initio calculations, we conclude that the rolling is initiated by the strong adsorption of maghemite nanoparticles at nitrogen defects in the graphene lattice and their mutual magnetic interaction. The nanoscroll formation is fully reversible and upon removal of the maghemite nanoparticles, the nanoscrolls return to open sheets. Besides supplying information on the rolling mechanism of graphene nanoscrolls, our results also provide important information on the stabilization of iron oxide nanoparticles.

Suggested Citation

  • Tiva Sharifi & Eduardo Gracia-Espino & Hamid Reza Barzegar & Xueen Jia & Florian Nitze & Guangzhi Hu & Per Nordblad & Cheuk-Wai Tai & Thomas Wågberg, 2013. "Formation of nitrogen-doped graphene nanoscrolls by adsorption of magnetic γ-Fe2O3 nanoparticles," Nature Communications, Nature, vol. 4(1), pages 1-9, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3319
    DOI: 10.1038/ncomms3319
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