Organometallic Hexahapto Functionalization of Single Layer Graphene as a Route to High Mobility Graphene Devices

Authors

  • Santanu Sarkar,

    1. Center for Nanoscale Science and Engineering, Departments of Chemistry and Chemical & Environmental Engineering, University of California, Riverside, CA 92521-0403, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Hang Zhang,

    1. Department of Physics and Astronomy, University of California, Riverside, CA 92521-0403, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Jhao-Wun Huang,

    1. Department of Physics and Astronomy, University of California, Riverside, CA 92521-0403, USA
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  • Fenglin Wang,

    1. Department of Physics and Astronomy, University of California, Riverside, CA 92521-0403, USA
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  • Elena Bekyarova,

    1. Center for Nanoscale Science and Engineering, Departments of Chemistry and Chemical & Environmental Engineering, University of California, Riverside, CA 92521-0403, USA
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  • Chun Ning Lau,

    Corresponding author
    1. Department of Physics and Astronomy, University of California, Riverside, CA 92521-0403, USA
    • Department of Physics and Astronomy, University of California, Riverside, CA 92521-0403, USA.
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  • Robert C. Haddon

    Corresponding author
    1. Center for Nanoscale Science and Engineering, Departments of Chemistry and Chemical & Environmental Engineering, University of California, Riverside, CA 92521-0403, USA
    • Center for Nanoscale Science and Engineering, Departments of Chemistry and Chemical & Environmental Engineering, University of California, Riverside, CA 92521-0403, USA
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Abstract

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Organometallic hexahapto (η6)-chromium metal complexation of single-layer graphene, which involves constructive rehybridization of the graphene π-system with the vacant chromium dπ orbital, leads to field effect devices which retain a high degree of the mobility with enhanced on-off ratio. This η6 mode of bonding is quite distinct from the modification in electronic structure induced by conventional covalent σ-bond formation with creation of sp3 carbon centers in graphene lattice and this chemistry is reversible.

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