中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 19 Special 3 December 2009 |
laser ablation
（1. Jiangsu Key Laboratory of ASCI Design, Nantong University, Nantong 226019, China;
2. Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology,
Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
3. Institute of Microelectronics, Chinese Academy of Sciences, Bejing 100029, China;
4. Nantong Fujitsu Microelectronics Co. Ltd, Nantong 226006, China）
Abstract:The laser ablation technique was employed to prepare TiO2 nanoparticles by pulsed laser ablation of a titanium target immersed in the poly-(vinylpyrrolidone) solution using wavelength of 1 064 nm. The as-prepared products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results indicate that the rutile TiO2 nanoparticles are synthesized at room temperature and the average size is about 35 nm with narrow size distribution. A possible formation mechanism was discussed and the UV-vis absorption and photoluminescence were measured. The optical study shows that rutile nanoparticle possesses direct optical transition with band gap of 3.15 eV.
Key words: TiO2 rutile; laser ablation; nanoparticles; photoluminescence
