Taking Bragg Coherent Diffraction Imaging to Higher Energies at Fourth Generation Synchrotrons: Nanoscale Characterization
Résumé
High-energy Bragg coherent diffraction imaging (BCDI) can enable three-dimensional imaging of atomic structure within individual crystallites in complex environments. Here, we show that sufficient coherent photon flux is available to extend the BCDI technique to higher energies to: 1) obtain improved strain information and sensitivity 1 at the nanoscale with higher order Bragg reflections, 2) exploit BCDI in embedded materials or complex operando environments, 3) reduce x-ray induced sample modification and 4) minimize dynamical scattering effects. We demonstrate the nanoscale imaging technique on the same sub-micron sized crystal at 8.5, 19.9 and 33.4 keV by taking advantage of the brilliance and coherence of the fourth generation Extremely Brilliant Source of the ID01 beamline at ESRF-The European Synchrotron (Grenoble, France). The photon flux, data quality, resolution and strain information are compared. We also show first coherent diffraction measurements performed at the ID31-EBS beamline at an energy of 41 keV.
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