Fabrication and characteristics of rutile TiO2 nanoparticles induced by
laser ablation
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)
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