Enhanced dielectric response induced by controlled morphology in rutile TiO2 nanocrystals

Minoru Osada, Makoto Kobayashi, Masato Kakihana

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)


    High-quality rutile TiO2 nanocrystals have been synthesized by a simple hydrothermal treatment of a watersoluble titaniumglycolate complex at 200°C. The obtained samples were composed of rod- or whisker-like nanocrystals. The aspect ratios of these nanocrystals could be controlled by adding glycolic acid. Combined characterizations with X-ray diffraction, Raman scattering and high-resolution transmission electron microscopy revealed the formation of highly phase-pure and well-crystallized rutile nanorods/ nanowhiskers with the c-axis orientation. Roomerature dielectric measurements indicated that the permittivity for the rutile nanowhiskers is ∼150 at 100 kHz, which is higher than that for the bulk rutile powder. These observations pave a way for morphological controlled rutile nanocrytals to find a broad class of technological uses.

    Original languageEnglish
    Pages (from-to)593-597
    Number of pages5
    JournalJournal of the Ceramic Society of Japan
    Issue number1416
    Publication statusPublished - 2013 Aug


    • Dielectric material
    • Hydrothermal treatment
    • Nanocrystal
    • Rutile-type titanium oxide
    • Watersoluble titanium complex

    ASJC Scopus subject areas

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


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