Amorphous spherical titanium dioxide (TiO 2 ) nanoparticles, decorated gold nanoparticles, are shown to be formed under irradiation of commercial TiO 2 nanopowders dispersed in aqueous solution of hydrogen tetrachloroaurate (HAuCl 4 ) by second-harmonic nanosecond pulses of an Nd : YAG laser. It is found that these hybrid nanostructures are formed during laser-induced remelting of the initial nanoparticles, stimulated by gold nanoclusters (providing more efficient absorption of visible laser radiation by titanium dioxide) recovered on their surface. The morphology and chemical composition of the newly formed hybrid nanomaterials are investigated in detail by electron microscopy, Raman spectroscopy, and energy-dispersive analysis. It is shown that the average size and number of gold nanoparticles recovered on the TiO 2 surface can be controlled by varying the concentration ratio of the initial nanomaterial and HAuCl 4 . A spectroscopic ...

中文翻译：

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脉冲激光烧蚀法合成金纳米簇修饰的TiO 2纳米粒子

非晶态球形二氧化钛（TiO 2）纳米颗粒（装饰金纳米颗粒）显示是通过Nd：YAG激光的二次谐波纳秒脉冲在分散在四氯金酸氢盐（HAuCl 4）水溶液中的商用TiO 2纳米粉的辐照下形成的。发现这些杂化纳米结构是在初始纳米颗粒的激光诱导重熔过程中形成的，这些纳米结构受回收在其表面上的金纳米团簇（通过二氧化钛更有效地吸收可见激光辐射）的刺激而形成。通过电子显微镜，拉曼光谱和能量色散分析详细研究了新形成的杂化纳米材料的形态和化学组成。结果表明，可以通过改变初始纳米材料和HAuCl 4的浓度比来控制在TiO 2表面回收的金纳米颗粒的平均大小和数量。光谱...