Defects in Solid Materials

Making a significant change in the whole by adding a small perturbation and creating an interesting new phenomenon plays an important role in the concept of the correlation between individual and collective matter.

The functions and physical properties of a solid, which is a group of atoms, are determined by the arrangement of atoms, but defects that disturb the arrangement can have large effects on the functions and physical properties. Metal oxides are typical material thereof, and their functions and physical properties are significantly affected by defects such as oxygen vacancies, adsorbates, and interstitial ions. However, there are many unclear points about the mechanism.

By using a technique such as scanning probe microscopy, these defects can be directly observed at the atomic level and their physical properties can be analyzed. So far, we have analyzed the electronic state created by defects on the surface of titanium dioxide, the interaction with metal clusters, the manipulation reaction of defects, and the reaction mechanism. Analysis under reaction conditions reveals the mechanism of more complex but strongly related phenomena in real space.




Representative papers
触媒 62, 15 (2020).
ACS Nano 9, 6837 (2015).
Chem. Rec. 14, 923-934 (2014).
J. Chem. Phys. 130, 124502 (2009).