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  • Title: Nanoscale reduction of graphene fluoride via thermochemical nanolithography.
    Author: Lee WK, Haydell M, Robinson JT, Laracuente AR, Cimpoiasu E, King WP, Sheehan PE.
    Journal: ACS Nano; 2013 Jul 23; 7(7):6219-24. PubMed ID: 23758200.
    Abstract:
    Graphene nanoribbons (GNRs) would be the ideal building blocks for all carbon electronics; however, many challenges remain in developing an appropriate nanolithography that generates high-quality ribbons in registry with other devices. Here we report direct and local fabrication of GNRs by thermochemical nanolithography, which uses a heated AFM probe to locally convert highly insulating graphene fluoride to conductive graphene. Chemically isolated GNRs as narrow as 40 nm show p-doping behavior and sheet resistances as low as 22.9 KΩ/□ in air, only approximately 10× higher than that of pristine graphene. The impact of probe temperature and speed are examined as well as the variable-temperature transport properties of the GNR.
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