Electrical conductivities of nanosheets studied by conductive atomic force microscopy

Neval Yilmaz, Shintaro Ida, Yasumichi Matsumoto

    研究成果: ジャーナルへの寄稿学術誌査読

    11 被引用数 (Scopus)

    抄録

    The electrical conductivities of single nanosheets of titanium oxide (TiO2), manganese oxide (MnO2), double-layered titanium perovskite oxide (GdEuTiO), niobium oxide (NbO), and graphite oxide (GO) adsorbed on HOPG were studied by conductive atomic force microscopy (C-AFM) with a Pt-Ir tip. The conduction mechanism for different types of nanosheets could be clarified by using electrodes (HOPG and Pt-Ir tip) having different work functions. While the TiO2, GdEuTiO, and NbO nanosheets showed asymmetric (rectifying) current/voltage (I/V)-profiles, those for the MnO2 and GO nanosheets were symmetric (nonrectifying). The differences in the I/V-profile indicated that the dominant electron transfer mechanism in case of TiO2, GdEuTiO, and NbO nanosheets was tunneling under reverse bias like an n-type semiconductor and that for MnO2 and GO nanosheets, having a defected structure, was hopping. Among all these nanosheets, MnO2 exhibited the highest conductivity.

    本文言語英語
    ページ(範囲)62-66
    ページ数5
    ジャーナルMaterials Chemistry and Physics
    116
    1
    DOI
    出版ステータス出版済み - 7月 15 2009

    !!!All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 凝縮系物理学

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