Interface measurement Smart lab

Professor ABUKAWA Tadashi

International Center for Synchrotron Radiation Innovation Smart

Concurrent : Institute of Multidisciplinary Research for Advanced Materials

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• TEL：022-217-5364

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Themes

• Development of novel diffraction techniques for surface structure analysis
• Surface analysis of functional devices by photoelectron spectroscopy
• Study of nano-surface properties using nano-beam electron and X-ray
• Surface dynamics studied by photoemission electron microscope

Keywords

Surface and interface analysis, Surface structure analysis, Diffraction, Photoelectron spectroscopy

Research Activities

Understand the surfaces, interfaces, and two-dimensional materials from the atomic level

Friction, hydrophilicity, water repellency, rust, adhesion, adsorption, battery electrodes, solid catalysts, and many other things around us are related to the physical properties of surfaces, but they are not well understood at the atomic level. The ultimate goal of surface physics is to systematically understand the micro- and macroscopic phenomena related to surfaces from the atomic level. In order to achieve the goal, it is essential to clarify the arrangement of atoms on the surface (surface structure), and to understand the valence states that govern their bonding. It is known that surfaces, where the arrangement of atoms is abruptly terminated, have a different symmetry from that inside a crystal, and often take a different composition and a peculiar structure that cannot be realized inside a solid. While this complexity leads to new functions of surfaces and interfaces, it also hinders our understanding of them at the atomic level. Using state-of-the-art synchrotron radiation, we will develop a method to visualize the structure and electronic state of surfaces and interfaces and elucidate the mechanism of functions of surfaces and interfaces.

Diffuse intensity map and surface atomic structure projected on a sphere obtained by correlated thermal diffuse scattering method.

Three-dimensional reciprocal map and surface structure model obtained by Weissenberg reflection high energy electron diffraction

Message

High brilliant and coherent X-rays emitted from the next generation synchrotron radiation (NXGSR) have the potential to visualize former invisible objects and unexpected properties of materials. In order to take advantage of the X-rays of NXGSR, we need to continuously improve our state-of-the-art measurement technology.