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

Rutile-type TiO2 rods were grown on glass substrates through heterogeneous nucleation in TiCl3 aqueous solutions at low temperatures of 80 or 200 deg C under hydrothermal conditions. The reaction temperature of 80 deg C led to the initial formation of self-assembled nanoneedles 5nm in diameter, whic...

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Bibliographic Details
Published in:Journal of crystal growth 2006-08, Vol.293 (2), p.541-545
Main Authors: Kakiuchi, Keita, Hosono, Eiji, Imai, Hiroaki, Kimura, Toshio, Fujihara, Shinobu
Format: Article
Language:English
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Summary:Rutile-type TiO2 rods were grown on glass substrates through heterogeneous nucleation in TiCl3 aqueous solutions at low temperatures of 80 or 200 deg C under hydrothermal conditions. The reaction temperature of 80 deg C led to the initial formation of self-assembled nanoneedles 5nm in diameter, which further grew into needle-like rutile rods 500nm in length by prolonging a reaction period to 168h. In contrast, the temperature of 200 deg C was effectively used to promote the growth of rutile rods much faster. Interestingly, after the growth for 24h, the top of all the rods were pyramidically capped. A transmission electron microscopic observation revealed that the pyramidical tops consisted of {111} planes of rutile. Our results then demonstrated that the unusually {111}-faceted rutile could be grown under mild conditions using the aqueous solutions
ISSN:0022-0248
DOI:10.1016/j.jcrysgro.2006.06.004