High-temperature dielectric responses of molecularly-thin titania nanosheet

Yoon Hyun Kim, Minoru Osada, Lei Dong, Hyung Jun Kim, Takayoshi Sasaki

    研究成果: Article

    5 引用 (Scopus)


    We have investigated high-temperature dielectric properties of titania nanosheet (Ti<inf>0.87</inf>O<inf>2</inf>), a new class of high-κ nanomaterials derived from the exfoliation of layered compounds. In-situ characterizations using atomic force microscopy indicate a robust insulating property in a monolayer form of Ti<inf>0.87</inf>O<inf>2</inf> nanosheets even at 200°C. Furthermore, layer-by-layer assembled nanocapacitors exhibit both size-free high-ε<inf>r</inf> characteristic (∼120) and high insulation resistance (∼10<sup>-7</sup> A/cm<sup>2</sup>) at high temperatures up to 250°C. The simultaneous improvement of ε<inf>r</inf> and thermal stability in high-κ nanodielectrics is of critical importance for applications of high-temperature capacitors.

    ジャーナルNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
    出版物ステータスPublished - 2015

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Materials Chemistry
    • Chemistry(all)
    • Condensed Matter Physics

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