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2015-6-9

A group of researchers from UCLA, Georg-August-Universität Göttingen, and Osaka University developed in situ X-ray nanodiffraction to measure high-resolution diffraction patterns from single grains with up to 5 ms temporal resolution. This group also succeeded in real-time observation of grain rotation and lattice deformation associated with the chemical reactions induced by X-ray photons.

  • University of California, Los Angeles -- Jianwei Miao (Professor)
  • Georg-August-Universität Göttingen -- Tim Salditt (Professor)
  • Precision Science & Technology and Applied Physics, Graduate School of Engineering, Osaka University -- TAKAHASHI Yukio (Associate Professor), SUZUKI Akihiro (3rd year student in a doctoral program,
  • Japan Society for the Promotion of Science Fellow)

Abstract

In situ X-ray diffraction (XRD) and transmission electron microscopy (TEM) have been used to investigate many physical science phenomena, ranging from phase transitions, chemical reactions and crystal growth to grain boundary dynamics. A major limitation of in situ XRD and TEM is a compromise that has to be made between spatial and temporal resolution. Here, we report the development of in situ X-ray nanodiffraction to measure high-resolution diffraction patterns from single grains with up to 5 ms temporal resolution. We observed, for the first time, grain rotation and lattice deformation in chemical reactions induced by X-ray photons: Br + hv right arrow Br + e and e + Ag+ right arrow Ag0. The grain rotation and lattice deformation associated with the chemical reactions were quantified to be as fast as 3.25 rad s−1 and as large as 0.5 Å, respectively. The ability to measure high-resolution diffraction patterns from individual grains with a temporal resolution of several milliseconds is expected to find broad applications in materials science, physics, chemistry and nanoscience.

Schematic layout of in situ nanodiffraction with up to 5ms temporal resolution

To learn more about this research, please view the full research report entitled "Grain rotation and lattice deformation during photoinduced chemical reactions revealed by in situ X-ray nanodiffraction" at this page of the Nature Materials website.



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