Condensed-Matter Physics & Materials Science Seminar

"X-ray Imaging via Bragg CDI: From Ultrafast Physics to Defect Dynamics"

Presented by Andrew Ulvestad, Argonne National Laboratory

Friday, October 7, 2016, 11:00 am — ISB Bldg. 734, Conf. Rm. 201 (upstairs)

Bragg coherent diffractive imaging is an emerging x-ray imaging technique capable of resolving both defect and ultrafast dynamics in nanocrystals with three-dimensional detail and nanometer resolution. This ability to study single nanocrystals in their reactive environments opens new insight into a broad range of materials science questions, including how to improve materials that convert heat into electricity, understanding degradation in advanced battery cathodes, and probing the structure-stability relationship in fuel cell catalysts. Here I will discuss Bragg CDI studies of phonon dynamics in Zinc Oxide and defect dynamics in thin film grains driven by temperature. Finally, I will touch on future directions for BCDI with the anticipated increase in coherent flux at upgraded synchrotrons.

Hosted by: Ian Robinson

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