{1 1 1}-faceting of low-temperature processed rutile TiO2 rods

Keita Kakiuchi, Eiji Hosono, Hiroaki Imai, Toshio Kimura, Shinobu Fujihara

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

Rutile-type TiO2 rods were grown on glass substrates through heterogeneous nucleation in TiCl3 aqueous solutions at low temperatures of 80 or 200 °C under hydrothermal conditions. The reaction temperature of 80 °C led to the initial formation of self-assembled nanoneedles 5 nm in diameter, which further grew into needle-like rutile rods 500 nm in length by prolonging a reaction period to 168 h. In contrast, the temperature of 200 °C was effectively used to promote the growth of rutile rods much faster. Interestingly, after the growth for 24 h, the top of all the rods were pyramidically capped. A transmission electron microscopic observation revealed that the pyramidical tops consisted of {1 1 1} planes of rutile. Our results then demonstrated that the unusually {1 1 1}-faceted rutile could be grown under mild conditions using the aqueous solutions.

Original languageEnglish
Pages (from-to)541-545
Number of pages5
JournalJournal of Crystal Growth
Volume293
Issue number2
DOIs
Publication statusPublished - 2006 Aug 1

Keywords

  • A1. Crystal morphology
  • A2. Hydrothermal crystal growth
  • B1. Oxides
  • B1. Titanium compounds

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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