Bio:
Marie-Ingrid Richard is a researcher at CEA-Grenoble within the Grenoble Interdisciplinary Research Institute (IRIG). She is also a visiting scientist at the ID01 beamline of the European Synchrotron Radiation Facility (ESRF). Her current research focuses on the study of the structure of nano-materials during reaction/operation thanks to the development of new X-ray diffraction techniques: fast pole figure acquisition, focused nano beam X-ray diffraction and coherent (resonant) X-ray diffraction.

She obtained her PhD in condensed matter physics from Joseph Fourier University (Grenoble, France) in 2007. She used state-of-the-art setups for in situ study of nano-materials growth under X-ray beams at ESRF and Advanced Photon Source (APS-USA). From the end of 2008 to the end of 2019, she worked at the University of Aix-Marseille and at the IM2NP laboratory as an associate professor on the structural characterization of nanostructures. Recently, she joined CEA-Grenoble to continue her research work. She is a laureate of a European ERC project which aims at imaging in three dimensions the structure of nano-catalysts during their reaction.

Abstract:
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 this talk, I will illustrate how Bragg coherent x-ray imaging allows to image in three dimensions (3D) and at the nanoscale the strain and defect dynamics inside nanoparticles as well as their refaceting during (electro-)catalytic reactions. I will also highlight the potential of machine learning to predict characteristic structural features in nanocrystals just from their 3D Bragg coherent diffraction patterns.

The CoWork webinar series is dedicated to the exploitation of the coherence properties of X-rays for advanced materials characterization, with a special focus on inverse microscopy techniques, such as Coherent Diffraction Imaging (CDI), Ptychography and Holography. It is an introduction to Coherent X-ray imaging methods to facilitate the access to advanced microscopy techniques to new users and it welcomes all researchers intrigued by the spectacular coherence properties of X-rays produced at modern synchrotron sources – of which MAX IV is a first example.