Lattice-oriented catalytic growth of graphene nanoribbons on heteroepitaxial nickel films

Hiroki Ago, Izumi Tanaka, Yui Ogawa, Rozan Mohamad Yunus, Masaharu Tsuji, Hiroki Hibino

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    Abstract

    Graphene nanoribbons (GNRs) are a promising material for electronic applications, because quantum confinement in a one-dimensional nanostructure can potentially open the band gap of graphene. However, it is still a challenge to synthesize high-quality GNRs by a bottom-up approach without relying on lithographic techniques. In this work, we demonstrate lattice-oriented catalytic growth of single-layer GNRs on the surface of a heteroepitaxial Ni film. Catalytic decomposition of a poly(methyl methacrylate) film on the Ni(100) film at 1000 C gives narrow nanoribbons with widths of 20-30 nm, which are aligned along either [011] or [011Ì...] directions of the Ni lattice. Furthermore, low-energy electron microscope (LEEM) analysis reveals that orientation of carbon hexagons in these GNRs is highly controlled by the underlying Ni(100) lattice, leading to the formation of zigzag edges. This heteroepitaxial approach would pave a way to synthesize nanoribbons with controlled orientation for future development of electronic devices based on graphene nanostructures.

    Original languageEnglish
    Pages (from-to)10825-10833
    Number of pages9
    JournalACS nano
    Volume7
    Issue number12
    DOIs
    Publication statusPublished - Dec 23 2013

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    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Engineering(all)
    • Physics and Astronomy(all)

    Cite this

    Ago, H., Tanaka, I., Ogawa, Y., Yunus, R. M., Tsuji, M., & Hibino, H. (2013). Lattice-oriented catalytic growth of graphene nanoribbons on heteroepitaxial nickel films. ACS nano, 7(12), 10825-10833. https://doi.org/10.1021/nn405122r