Physics Colloquium: X-RAY STANDING WAVE AND ITS APPLICATIONS TO SUPPORTED METAL OXIDE

Event Details

  • Speaker(s): Chang-Yong Kim
  • Date:
  • Time: 4:00 p.m.
  • Location: Science Complex, Atrium Wing, Rm. 1511

X-ray stand wave (XSW) is generated by coherent interference between incident and diffracted X-rays. Control of intensity maximum position of the spatially modulating XSW has been a powerful tool to get atomic-scale structure information. X-ray diffractions by single crystal substrate, thin film, multilayer and total external reflection have been used to generate the XSW's applicable to a wide range of length scale. The XSW analysis applies X-ray scattering and spectroscopy simultaneously and provides element specific, atomic-scale structure information. Combined with the photon-in and photon-out approach, the XSW has advantage in study of in situ film growth, liquid-solid interface, and mixed-oxide catalysis. The seminar will introduce recent development of model-independent, Fourier synthesis of atom distribution from the XSW analysis. Application of the XSW imaging method for study of supported metal oxide systems will be presented also.