Continuous band-filling control and one-dimensional transport in metallic and semiconducting carbon nanotube tangled films

Hidekazu Shimotani*, Satoshi Tsuda, Hongtao Yuan, Yohei Yomogida, Rieko Moriya, Taishi Takenobu, Kazuhiro Yanagi, Yoshihiro Iwasa

*この研究の対応する著者

    研究成果: Article査読

    38 被引用数 (Scopus)

    抄録

    Field-effect transistors that employ an electrolyte in place of a gate dielectric layer can accumulate ultrahigh-density carriers not only on a well-defined channel (e.g., a two-dimensional surface) but also on any irregularly shaped channel material. Here, on thin films of 95% pure metallic and semiconducting single-walled carbon nanotubes (SWNTs), the Fermi level is continuously tuned over a very wide range, while their electronic transport and absorption spectra are simultaneously monitored. It is found that the conductivity of not only the semiconducting but also the metallic SWNT thin films steeply changes when the Fermi level reaches the edges of one-dimensional subbands and that the conductivity is almost proportional to the number of subbands crossing the Fermi level, thereby exhibiting a one-dimensional nature of transport even in a tangled network structure and at room temperature.

    本文言語English
    ページ(範囲)3305-3311
    ページ数7
    ジャーナルAdvanced Functional Materials
    24
    22
    DOI
    出版ステータスPublished - 2014 6月 11

    ASJC Scopus subject areas

    • 電気化学
    • 凝縮系物理学
    • 電子材料、光学材料、および磁性材料
    • 生体材料

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