Mesophase of colloidally dispersed nanosheets prepared by exfoliation of layered titanate and niobate

Teruyuki Nakato*, Yoshie Yamashita, Kazuyuki Kuroda

*この研究の対応する著者

研究成果: Conference article査読

22 被引用数 (Scopus)

抄録

Colloidal dispersion of oxide nanosheets was prepared by exfoliation of lepidocrocite-type layered titanate H1.07Ti1.73O 4, and the obtained "nanosheet colloid" formed a liquid crystalline phase which was detected by birefringence of the colloid with naked-eye and optical microscope observations between crossed polarizers. The nanosheet colloids exhibited phase transition from isotropic to isotropic-liquid crystalline biphasic, and finally to full liquid crystalline, as the nanosheet concentration increased. The mesophase was characterized by the stability; liquid crystallinity appeared at low particle concentrations due to high aspect ratio (around 1 nm of thickness and ∼7 μm of lateral length) of the nanosheets. Mixing the titanate nanosheet colloid with hectorite clay yielded apparently homogeneous birefringent colloids, where a cationic cyanine dye was selectively adsorbed onto the clay nanosheets.

本文言語English
ページ(範囲)24-28
ページ数5
ジャーナルThin Solid Films
495
1-2
DOI
出版ステータスPublished - 2006 1月 20

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 表面および界面
  • 表面、皮膜および薄膜
  • 金属および合金
  • 材料化学

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