Formation mechanism of TiO[sub 2] nanotubes

Yao, B. D.; Chan, Y. F.; Zhang, X. Y.; Zhang, W. F.; Yang, Z. Y.; Wang, N.
January 2003
Applied Physics Letters;1/13/2003, Vol. 82 Issue 2, p281
Academic Journal
Transmission electron microscopic observation showed that TiO[sub 2] nanotubes synthesized via a simple hydrothermal chemical process formed a crystalline structure with open-ended and multiwall morphologies. Unlike multiwalled carbon nanotubes, the TiO[sub 2] nanotube walls were not seamless. During alkali treatment, crystalline TiO[sub 2] raw material underwent delamination in the alkali solution to produce single-layer TiO[sub 2] sheets. TiO[sub 2] nanotubes were formed by rolling up the single-layer TiO[sub 2] sheets with a rolling-up vector of [001] and attracting other sheets to surround the tubes.


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