|About this Abstract
||Materials Science & Technology 2009
||Characterization and Modeling of Ceramic-Ceramic and Metal-Ceramic Interfaces
||Interface Structures of Nanosized Gold on TiO2 (110)
||Naoya Shibata, Akira Goto, Katsuyuki Matsunaga, Teruyasu Mizoguchi, Scott D. Findlay, Takahisa Yamamoto, Yuichi Ikuhara
|On-Site Speaker (Planned)
Gold (Au) nanoparticles dispersed on metal oxide supports are active catalysts for a variety of chemical reactions. It has been well demonstrated that the unique catalytic activity strongly depends on the size of the Au nanoparticles and the properties of the metal oxide supports, suggesting the importance of gold-support interface interactions at a nanometer regime. It is thus essential to characterize the atomic structures of nanosized Au on metal oxide surfaces in order to truly understand the origin of the unique catalytic activity. In this study, we performed atomic-resolution plan-view STEM imaging of nanosized gold deposited on TiO<SUB>2</SUB> (110) and were able to directly observe the atomic structures of nanosized Au interacting with the TiO<SUB>2</SUB> surface. We found that the atomic-scale interface structure is strongly dependent on the size of the Au nanoparticles, and that unique epitaxial Au structure is observed when the Au size becomes less than 3nm.