Direct atomic-scale observation of catalytic reaction process on a surface of metal-oxide insulator

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The metallic oxide is one of the functionality materials that can be applied to a lot of fields such as catalyst, optics, magnetic materials, and semiconductor devices. To understand its property in an atomic level is indispensable to develop the next generation technology. Chemical reactions acting on its surface, however, are very complex because it depends on the environment like the temperature and pressure. By developing a non-contact atomic force microscope that has a capability of temperature and pressure control, we have tried to clarify atomic structures, electronic states and reactive process on surfaces of metal-oxide insulators.