In-situ diffraction studies on the crystallization and crystal growth in anodized TiO 2 nanofibres

Uniform and highly ordered TiO 2 nano-fibers were synthesized using anodic oxidation of Ti foils. The crystallization and crystal growth of TiO 2 nano-fiber arrays were characterized using in-situ synchrotron radiation diffraction at the temperature range 25-700°C. The anodized TiO 2 was initially amorphous but crystallized to anatase at ∼400°C and to rutile at ∼550-600°C. The time of anodization has no influence on crystal growth and has an appreciable affect on the fraction of anatase-to-rutile transformation.