Enhanced dielectric response induced by controlled morphology in rutile TiO2 nanocrystals

Minoru Osada; Makoto Kobayashi; Masato Kakihana

doi:10.2109/jcersj2.121.593

Enhanced dielectric response induced by controlled morphology in rutile TiO₂ nanocrystals

Minoru Osada^*, Makoto Kobayashi, Masato Kakihana

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	593-597
Number of pages	5
Journal	Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume	121
Issue number	1416
DOIs	https://doi.org/10.2109/jcersj2.121.593
Publication status	Published - 2013 Aug
Externally published	Yes

Keywords

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

ASJC Scopus subject areas

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

Access to Document

10.2109/jcersj2.121.593

Cite this

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title = "Enhanced dielectric response induced by controlled morphology in rutile TiO2 nanocrystals",

abstract = "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.",

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author = "Minoru Osada and Makoto Kobayashi and Masato Kakihana",

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AU - Kobayashi, Makoto

AU - Kakihana, Masato

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AB - 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.

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