We have developed the methodology around Bragg coherent x-ray diffraction as well as obtained major results in the field of structural imaging of model catalysts.
We have published a paper to give clues for a quantitative determination of strain in Bragg coherent x-ray diffraction imaging [J. Carnis, et al., Sci Rep 9, 1 (2019)].
In Ref. [N. Li et al., Sci Rep 10, 12760 (2020)], we have explored the use of continuous scanning during data acquisition for Bragg coherent diffraction imaging. Continuous scanning will allow to minimise sample instability under the beam and will become increasingly important at diffraction limited storage ring light sources.
We have also demonstrated the use of variable-wavelength quick scanning nano-focused x-ray microscopy for in situ strain and tilt mapping [M.-I. Richard, et al., Small 16, 1905990 (2020)].
We have applied Bragg coherent x-ray diffraction to map the evolution of structural defects along a nanowire [N. Li et al., ACS Nano 14, 10305 (2020)].
Studying model nanoparticles is one approach to better understand the structural evolution of a catalyst during reactions. A facet recognition algorithm has been applied to the image nanoparticles and provide facet-dependent structural information for all measured nanoparticles [J. Carnis, et al., Small 17, 2007702 (2021)].
Ordered phases are essential to enhance the magnetic or catalytic properties of alloyed nanoparticles. We have shown that a fully accurate strain distribution can be retrieved from both fundamental (in ordered and disordered phases) and superstructure (only in ordered phases) reflections [M. Dupraz, et al., J Appl Cryst 53, 5 (2020)].
For the first time, we have applied machine learning for defect classification from 3D coherent diffraction patterns [B. Lim et al., Npj Comput Mater 7, 1 (2021)].
We have successfully demonstrated the possibility of measuring in 3D particles as small as 20 nm and of applying phase retrieval for the 3D diffraction patterns of these particles [M.I. Richard et al., J. Appl. Crys. 55, 621 (2022)].
We have developed Gwaihir, a user-friendly and open-source tool to process and analyse Bragg coherent [D. Simonne et al., J. Appl. Crys. 55, 1045 (2022)]. It is public for the community.
We have reported an unusual twin boundary migration process in a single platinum nanoparticle during CO oxidation using Bragg coherent diffraction imaging as the characterisation tool [J. Carnis et al., Nat Commun 12, 5385 (2021)].
We have successfully measured in situ the catalytic structure-activity relationships of single Pt nanoparticles by nano-focused coherent Bragg imaging during CO oxidation [M. Dupraz, et al., Nat. Commun. 13, 3003 (2022)].
We have demonstrated the first Bragg coherent diffraction imaging experiment looking at the strain inside a single crystal under electrochemical control [C. Atlan, et al., Nature Materials 22, 754 (2023)].
By taking advantage of the brilliance and coherence of the fourth generation Extremely Brilliant Source, we show the extension of the BCDI technique to higher energies [M.-I. Richard et al., ACS Applied Nano Materials 6, 10246 (2023).]
Upon time-resolved 3D BCDI, we achieved for the first time subsecond time resolution during operando chemical reactions [M. Grimes, et al., ACS Nano 18, 19608 (2023)].
