Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


LAST UPDATE 2021/05/05

  • 研究者氏名
    Researcher Name

    石黒志 Nozomu ISHIGURO
    助教 Assistant Professor
  • 所属
    Professional Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    計測研究部門 放射光可視化情報計測研究分野
    Division of Measurements, Synchrotron Radiation Microscopy and Informatics
  • 研究キーワード
    Research Keywords

    X-ray Imaging
    X-ray Absorption Fine Structure
Research Subject
Chemical State Visualization of Advanced Functional Materials

研究の背景 Background


Functional Materials used today, such as heterogeneous catalysts, have multi-components and non-uniform structures, where information of where and how the material functionalities work or degrade, are hidden by the poor spatial resolution of conventional spectroscopic characterization methods. If these non-uniform and hidden aspects became available, it will be a great help for innovations of further advanced functional material.

研究の目標 Outcome


(1) Development of chemical state visualization techniques by the combination of nano-scaled X-ray imaging, such as X-ray ptychography, and X-ray absorption fine structure (XAFS) spectroscopy, using synchrotron facilities. (2) Operando imaging-XAFS measurements of heterogeneous catalysts system in reaction condition. (3) Visualization of origins of material functionalities hidden by data-mining analysis techniques of 3-dimensional chemical state information.

研究図Research Figure

Fig. Schematic of chemical state visualization strategy of non-uniform functional materials. (1) Energy stacks of nano-scaled X-ray imaging using synchrotron facilities provide 2-/3-dimensional spatially-resolved spectra of non-uniform materials at each pixel. (2) Analysis of spatially-resolved XAFS provides nano-scaled distribution of chemical state parameters (element composition, valence, coordination structure) in real space. (3) Investigation of hidden correlations between each chemical state imaging and geometrical data in non-uniform materials by data-mining analysis.

文献 / Publications

Angew. Chem. Int. Ed. 57, 1474-1479 (2018). Communs. Chem. 2:50 (2019). Phys. Chem. Chem. Phys. 13, 14910-14913 (2011). ChemPhysChem 15, 1563-1568 (2014). ACS Catal. 2, 1319-1330 (2012). J. Phys. Chem. C 118,15874-15883 (2014). J. Phys. Chem. C 120, 19642-19651 (2016).