TEM and HAADF-STEM study of the structure of Au nano-particles on CeO2
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- Akita, T., Tanaka, K. & Kohyama, M. J Mater Sci (2008) 43: 3917. doi:10.1007/s10853-007-2401-4
The structure and growth process of Au particles on CeO2 were observed by the transmission electron microscope (TEM) equipped with the high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) system. The growth of Au particles on CeO2 was shown to be mainly Ostwald ripening under heating at various temperatures, although it is suppressed in the hydrogen atmosphere. In the HAADF-STEM observation of Au/CeO2 interfaces with the orientation relationship of (111)[1–10]Au//(111)[1–10]CeO2, (111)[−110]Au//(111)[1–10]CeO2 and atomic columns of Au and Ce were successfully resolved, and the interface structure was analyzed in details for the first time.