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Analytical TEM Observation of Gold Nano-Particles on Cerium Oxide

Published online by Cambridge University Press:  01 February 2011

Tomoki Akita ,
Koji Tanaka ,
Masanori Kohyama  and
Masatake Haruta
Tomoki Akita
Affiliation:
t-akita@aist.go.jp, National Institute of Advanced Industrial Science and Technology, Research Institute for Ubiquitous Energy Devices, Midorigaoka 1-8-31, Ikeda, Osaka, 563-8577, Japan
Koji Tanaka
Affiliation:
koji.tanaka@aist.go.jp, National Institute of advanced Industrial Science and Technology, Research Institute for Ubiquitous Energy Devices, Japan
Masanori Kohyama
Affiliation:
m-kohyama@aist.go.jp, National Institute of advanced Industrial Science and Technology, Research Institute for Ubiquitous Energy Devices, Japan
Masatake Haruta
Affiliation:
haruta-masatake@center.tmu.ac.jp, Tokyo Metropolitan University, Faculty of Urban Environmental Sciences, Japan
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Abstract

The structure of Au nano-particles supported on CeO2 was investigated by using an analytical transmission electron microscope (TEM). The shape change of Au particles was observed during TEM observation, such as shrinking down to a mono-atomic layer on the CeO2 substrate. The electron beam irradiation experiment revealed that the shape change of Au particles is concerning with the oxidation state or the density of oxygen vacancies of CeO2 substrate where the rapid desorption and adsorption of oxygen occurs. It was also found that the reduction by strong electron beam irradiation and subsequent oxidation generate the decoration of Au particles by cerium oxide.

Keywords

Autransmission electron microscopy (TEM)catalytic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 900: Symposium O – Nanoparticles and Nanostructures in Sensors and Catalysis , 2005 , 0900-O06-37
Copyright
Copyright © Materials Research Society 2006

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References

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