Anatase phase TiO₂ nanoparticles were synthesized by hydrolysis and peptization of the titanium tetraisopropoxied (TTIP) at a temperature as low as 80^oC and the effects of surfactant (cetyltrimethylammonium bromide, CTAB) on the shape of particles were investigated. The addition of surfactant was found to enhance the 1-directional growth of precipitates during the peptization process and increase the aspect ratio of resulting particles. Selected area diffraction (SAED) pattern and high resolution transmission electron microscopy (HRTEM) image revealed that the nanorods are single crystalline in nature and preferentially grown along [110]. X-ray diffraction confirmed that the synthesized powders were pure anatase phase regardless of the addition of surfactants. Bandgap and photocatalytic properties of nanorods were also characterized compared to those of spherical nanoparticles.

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