中文摘要：

采用液相激光烧蚀法制备了二氧化钛纳米颗粒，研究了二氧化钛纳米颗粒的生长与微结构．XRD、TEM、XPS等表征表明：此方法可在室温条件下一步获得金红石型二氧化钛纳米颗粒胶体，颗粒直径约50nm，尺寸分布窄，分散性好，从而显示出良好的应用前景．结合微观表征与激光诱导的瞬态等离子体分析对TiO2纳米颗粒形成机理进行了探讨．

英文摘要：

TiO2 nanoparticles were prepared by pulsed laser ablation of a titanium target immersed in the poly- （vinylpyrrolidone） solution. The products were systematically characterized by X-ray diffraction （XRD）, Transmission electron microscopy （TEM） and X-ray photoelectron spectroscopy （XPS）. The results indicated that the rutile TiO2 nanocrystalline particles could be synthesized at once at room temperature and the mean size in diameter is about 50 nm with narrow size distribution. A probable formation process was proposed on the base of the microstructure and the in- stantaneous plasma plume induced by laser. This study shows that pulse laser ablation in liquid media is a good method to synthesize some nanaparticles with special structures which are difficult to be produced by other conventional methods.