原子間力顕微鏡による二酸化チタン表面の研究

抄録

Titanium dioxide (TiO₂) surfaces have been extensively studied for its broad range of applications such as photocatalysis, heterogeneous catalysis, gas sensors, and solar cells. Rutile TiO₂ has also been investigated as a model system for studying the physical and chemical properties for studying more complex metal oxide surfaces. Here, we report studies of atomic-scale observation of TiO₂ surfaces by atomic force microscopy (AFM). While AFM imaging mechanism on TiO₂(110) has been understood well, we find the interpretation of AFM contrast on TiO₂(011) is not straightforward. In addition, we also perform simultaneous AFM and Kelvin probe force microscopy (KPFM) measurements on subsurface charges and single Pt atoms on the TiO₂(110) surfaces, respectively. We believe our findings in this report will be useful when investigate other catalytic system by AFM and KPFM