Vertical heterostructures of MoS2 and graphene nanoribbons grown by two-step chemical vapor deposition for high-gain photodetectors

Rozan Mohamad Yunus, Hiroko Endo, Masaharu Tsuji, Hiroki Ago

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    Heterostructures of two-dimensional (2D) layered materials have attracted growing interest due to their unique properties and possible applications in electronics, photonics, and energy. Reduction of the dimensionality from 2D to one-dimensional (1D), such as graphene nanoribbons (GNRs), is also interesting due to the electron confinement effect and unique edge effects. Here, we demonstrate a bottom-up approach to grow vertical heterostructures of MoS2 and GNRs by a two-step chemical vapor deposition (CVD) method. Single-layer GNRs were first grown by ambient pressure CVD on an epitaxial Cu(100) film, followed by the second CVD process to grow MoS2 over the GNRs. The MoS2 layer was found to grow preferentially on the GNR surface, while the coverage could be further tuned by adjusting the growth conditions. The MoS2/GNR nanostructures show clear photosensitivity to visible light with an optical response much higher than that of a 2D MoS2/graphene heterostructure. The ability to grow a novel 1D heterostructure of layered materials by a bottom-up CVD approach will open up a new avenue to expand the dimensionality of the material synthesis and applications.

    Original languageEnglish
    Pages (from-to)25210-25215
    Number of pages6
    JournalPhysical Chemistry Chemical Physics
    Volume17
    Issue number38
    DOIs
    Publication statusPublished - Sep 1 2015

    Fingerprint

    Carbon Nanotubes
    Graphite
    Photodetectors
    high gain
    photometers
    Heterojunctions
    Chemical vapor deposition
    graphene
    vapor deposition
    Photosensitivity
    photosensitivity
    Photonics
    Nanostructures
    Electronic equipment
    adjusting
    photonics
    Electrons
    synthesis
    electronics

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)
    • Physical and Theoretical Chemistry

    Cite this

    Vertical heterostructures of MoS2 and graphene nanoribbons grown by two-step chemical vapor deposition for high-gain photodetectors. / Yunus, Rozan Mohamad; Endo, Hiroko; Tsuji, Masaharu; Ago, Hiroki.

    In: Physical Chemistry Chemical Physics, Vol. 17, No. 38, 01.09.2015, p. 25210-25215.

    Research output: Contribution to journalArticle

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