Synchrotron-Radiation Photoemission Study of Growth and Stability of Au Clusters on Rutile TiO2（110）-1×1  

同步辐射光电了能谱研究在团簇存金红石相TiO2-（1×1）表面的生长和稳定性

作　　者：于欣[1,2] 许令顺[1] 张文华[2] 姜志全[1] 朱俊发[2] 黄伟新[1] 

机构地区：[1]中国科学技术大学合肥微尺度物质科学国家实验室,化学物理系,合肥230026 [2]中国科学技术大学国家同步辐射实验室,合肥230029

出　　处：《Chinese Journal of Chemical Physics》2009年第4期339-345,447,共8页化学物理学报（英文）

基　　金：ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.20773113 and No.20803072）, the Hundred Talent Program of Chinese Academy of Sciences, the MOE Program for Changjiang Scholars and Innovative Research Team （No.IRT0756）, and the MPG-CAS Partner-group Program.

摘　　要：The growth and thermal stability of Au clusters on a partially-reduced rutile TiO2 （110）-1 × 1 surface were investigated by high-resolution photoelectron spectroscopy using synchrotron- radiation-light. The valence-band photoelectron spectroscopy results demonstrate that the Ti^3＋3d feature attenuates quickly with the initial deposition of Au clusters, implying that Au clusters nucleate at the oxygen vacancy sites. The Au4f core-level photoelectron spectroscopy results directly prove the existence of charge transfer from oxygen vacancies to Au clusters. The thermal stability of Au clusters on the partially-reduced and stoichiometric TiO2（110） surfaces was also comparatively investigated by the annealing experiments. With the same film thickness, Au clusters are more thermally stable on the partially-reduced TiO2（110） surface than on the stoichiometric TiO2（110） surface. Meanwhile, large Au nanoparticles are more thermally stable than fine Au nanoparticles.

关 键 词：Synchrotron-radiation photoelectron spectroscopy Au cluster TiO2（110） Charge transfer Thermal stability 

分 类 号：O484.1[理学—固体物理] TQ134.11[理学—物理]