Tunable doping of graphene nanoribbon arrays by chemical functionalization

Pablo Solís-Fernández, Mark A. Bissett, Masaharu Tsuji, Hiroki Ago

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    We demonstrate the controlled tuning of the electronic band structure of large-arrays of graphene nanoribbons (GNRs) by chemical functionalization. The GNR arrays are synthesized by substrate-controlled metal-assisted etching of graphene in H2 at high temperature, and functionalized with different molecules. From Raman spectroscopy and carrier transport measurements, we found that 4-nitrobenzenediazonium (4-NBD) and diethylene triamine (DETA) molecules can tune the doping level of the GNR arrays to p- and n-type, respectively. In both cases, the doping effects induced in the GNRs were found to be higher than for a pristine graphene sheet, due to the presence of a large quantity of edges. Effects of chemical doping on the Raman spectrum of sp2 carbon materials are also discussed. Our findings offer an effective way to control the electronic structure of GNRs by chemical functionalization, and are expected to facilitate the production of nanoribbon-based p-n junctions for future implementation into electronic circuits. This journal is

    Original languageEnglish
    Pages (from-to)3572-3580
    Number of pages9
    JournalNanoscale
    Volume7
    Issue number8
    DOIs
    Publication statusPublished - Feb 28 2015

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)

    Fingerprint Dive into the research topics of 'Tunable doping of graphene nanoribbon arrays by chemical functionalization'. Together they form a unique fingerprint.

  • Cite this