Comparison of the phase transformation rate for TiO[sub]2[/sub] thin film and TiO[sub]2[/sub] nanorods

Yi Chen; K. S. Kang; J. Nayak; J. Kim

doi:10.1117/12.847485

30 March 2010 Comparison of the phase transformation rate for TiO₂ thin film and TiO₂ nanorods

Yi Chen, K. S. Kang, J. Nayak, J. Kim

Proceedings Volume 7646, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2010; 764608 (2010) https://doi.org/10.1117/12.847485
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

Relative phase transformation rates are compared with TiO₂ sol-gel thin film and TiO₂ nanorods. TiO₂ thin film was prepared with sol-gel process using titaanium isoproxide (TIP) as a precusor, ethanol as a solvent and HCl as a catalyst. The TiO₂ nanorods were synthesized with low temperature proccess (100 °C) using TIP, oleic acid, and aqueous trimethylamine. The prepared thin film and nanorods were annealed at 850 °C for 3 h. X-ray diffraction patterns reveal that the TiO₂ thin film and TiO₂ nanorods have amorphase phase and anatase phase, respectively before annealing process. Approximately 60 and 3 % of TiO₂ thin film and TiO₂ nanorods transformed from anatase phase to rutile phase after annealing at 850 °C for 3 h. Relatively small amount of TiO₂ nanorods transformed to rutile phase compared with TiO₂ thin film. This small amount of phase transformation may be due to the small diameter of the TiO₂ nanorods, which have thermodynamecally favorable anatase phase.

Citation Download Citation

Yi Chen, K. S. Kang, J. Nayak, and J. Kim "Comparison of the phase transformation rate for TiO₂ thin film and TiO₂ nanorods", Proc. SPIE 7646, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2010, 764608 (30 March 2010); https://doi.org/10.1117/12.847485

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