Structural evolution of nanoparticles under realistic conditions observed with Bragg coherent X-ray imaging

M.I. Richard (1) , M. Dupraz (2) , C. Chatelier (1) , C. Atlan (1) , E. Bellec (3) , N. Li (1) , S. Labat (4) , T. Schülli (3) , E. Rabkin (5) , O. Thomas (4) , J. Eymery (1) , S. Leake (3)

1 NRX - Nanostructures et Rayons X
2 NEEL - CRG - CRG & Grands instruments
3 ESRF - European Synchrotron Radiation Facility [Grenoble]
4 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
5 Technion - Israel Institute of Technology [Haifa]

The advent of the world’s first coherent hard X-ray sources represents an unprecedented opportunity to conduct in situ and operando studies on the structure of nanoparticles in reactive liquid or gas environments in synchrotrons. In this talk, I will illustrate how Bragg coherent X-ray imaging [1] allows to image in three dimensions (3D) and at the nanoscale the strain and defect dynamics inside nanoparticles as well as their refaceting during catalytic reactions [2–5]. I will also highlight the potential of machine learning to predict characteristic structural features in nanocrystals just from their 3D Bragg coherent diffraction patterns [6]

Domaines: Matériaux

M.I. Richard, M. Dupraz, C. Chatelier, C. Atlan, E. Bellec, et al.. Structural evolution of nanoparticles under realistic conditions observed with Bragg coherent X-ray imaging. Acta Crystallographica Section A : Foundations and Advances [2014-..], 2022, 78 (a2), pp.e94-e94. ⟨10.1107/S2053273322095869⟩. ⟨cea-04066378⟩