2015 年 57 巻 1 号 p. 41-46
TiO2 is used as catalyst materials. We have studied surface nanostructures of a rutile TiO2 single crystal by means of accelerator-based characterization methods such as synchrotron radiation, muon and positron. These nanostructures on the surface have no three dimensional long range order. We discuss three typical methods using positron, muon and synchrotron X-ray. We present the TiO2(110)-(1×2) surface structures studied by RHEPD (Reflection High Energy Positron Diffraction) using positron which provides a surface first layer structure. Muon spin resonance is another accelerator-based new technology which provides a defect structure and a hydrogen location. PTRF-XAFS (Polarization-dependent Total Reflection Fluorescence X-ray Absorption Fine Structure) using synchrotron X-ray is a unique technique which provides a local structure for a highly dispersed metal species on oxide single crystal surfaces. These accelerator-based methods will be a new class of surface structures and properties.