Figure 3.

SEM images of top view of (a) TNA, (b) TNA-TiCl4, and (c) TNA-TnB. The inset images are the side view of (a) TNA, (b) TNA-TiCl4, and (c) TNA-TnB. TNA, TiO2 nano-tube array; TNA-TnB, TiO2 nano-tubes after titanium (IV) n-butoxide treatment; TNA-TiCl4, TiO2 nano-tubes after titanium tetrachloride treatment.

Ho et al. Nanoscale Research Letters 2012 7:147   doi:10.1186/1556-276X-7-147
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