High-temperature dielectric responses of molecularly-thin titania nanosheet

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

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)335-339
    Number of pages5
    JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
    Volume123
    Issue number1437
    DOIs
    Publication statusPublished - 2015

    Fingerprint

    Nanosheets
    titanium
    Titanium
    Nanostructured materials
    insulation
    Dielectric properties
    Temperature
    dielectric properties
    Insulation
    Monolayers
    Atomic force microscopy
    capacitors
    Thermodynamic stability
    Capacitors
    thermal stability
    atomic force microscopy
    titanium dioxide

    Keywords

    • In-situ characterization
    • Nanodielectric
    • Thermal stability
    • Titania nanosheet

    ASJC Scopus subject areas

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

    Cite this

    High-temperature dielectric responses of molecularly-thin titania nanosheet. / Kim, Yoon Hyun; Osada, Minoru; Dong, Lei; Kim, Hyung Jun; Sasaki, Takayoshi.

    In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 123, No. 1437, 2015, p. 335-339.

    Research output: Contribution to journalArticle

    Kim, Yoon Hyun ; Osada, Minoru ; Dong, Lei ; Kim, Hyung Jun ; Sasaki, Takayoshi. / High-temperature dielectric responses of molecularly-thin titania nanosheet. In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan. 2015 ; Vol. 123, No. 1437. pp. 335-339.
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    AU - Sasaki, Takayoshi

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