Enhanced dielectric response induced by controlled morphology in rutile TiO2 nanocrystals

Minoru Osada, Makoto Kobayashi, Masato Kakihana

Research output: Contribution to journalArticle

8 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 languageEnglish
Pages (from-to)593-597
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume121
Issue number1416
DOIs
Publication statusPublished - 2013 Aug
Externally publishedYes

Fingerprint

Nanowhiskers
rutile
Nanocrystals
nanocrystals
glycolic acid
Crystal whiskers
High resolution transmission electron microscopy
Nanorods
Raman scattering
Aspect ratio
Permittivity
Powders
X ray diffraction
Acids
nanorods
aspect ratio
rods
titanium dioxide
permittivity
Raman spectra

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

Cite this

Enhanced dielectric response induced by controlled morphology in rutile TiO2 nanocrystals. / Osada, Minoru; Kobayashi, Makoto; Kakihana, Masato.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 121, No. 1416, 08.2013, p. 593-597.

Research output: Contribution to journalArticle

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