Monday, July 25, 2022 | 1:00 PM - 2:00 PM
Stephen F. & Camilla T. Brauer Hall, 12
6548 Forest Park Pkwy, St. Louis, MO 63112, USA
Robert Klie, Professor of Physics, University of Illinois - Chicago
Over the last two decades, we have witnessed a paradigm change in the way we characterize materials using electron microscopy. This latest revolution in resolution began in the late 1990’s with the first successful implementation of an objective lens aberration corrector, which improved the spatial resolution of transmission (TEM) and scanning transmission electron microscopy (STEM) by more than a factor of two to below 50 pm. These developments were followed by faster, more sensitive direct electron (CMOS) detectors, monochromated electron sources for electron spectroscopy and, most recently, magnetic field-free lenses. As the result of these transformational discoveries, we are now able to study materials with unprecedented resolution, sensitivity and precision. While spatial and energy resolutions better than 60 pm and 10 meV have been reported, aberration-corrected TEM has also enabled a large variety of in-situ experiments at close to atomic resolution.
In my talk, I will highlight several examples where atomic-resolution in-situ, multi-modal characterization and first-principles modeling are used to unravel the fundamental structure-property relationships of materials with potential applications in high-efficiency photovoltaic devices, rechargeable batteries or electro-catalysis. I will further introduce a novel approach to characterizing phase transitions in fluids at high spatial and isotopic resolution. I will conclude by presenting my vision for the future of electron microscopy, including new instrument designs as well as operando multi-modal methods.
Beth Gartin, bgartin@wustl.edu
Robert F. Klie is a Professor of Physics at the University of Illinois at Chicago and a world leader in the in-situ characterization of complex materials interfaces. He focuses on aberration-corrected imaging and spectroscopy of photovoltaic and battery cathode materials at the atomic-scale using scanning transmission electron microscopy (STEM). In recent years. Dr. Klie has pioneered novel approaches to studying water, biological systems and solid-liquid interfaces using graphene liquid cells and ultra-high resolution electron energy-loss spectroscopy (EELS). Dr. Klie has published over 200 peer-reviewed papers with more than9,000 citations, given more than 80 invited talks at prestigious international conferences, and has an h-index of 47. His scientific achievements have been recognized by a number of prestigious awards, including the Brookhaven Goldhaber Distinguished Fellowship and the University of Illinois Researcher of the Year award. He is also a Fellow of the Microscopy Society of America. Since 2017, Dr. Klie is in charge of the Functional and Regenerative Materials Initiative at the University of Illinois, bringing together scientists from the medical field and the areas of materials science and engineering to develop multi-modal approaches for in-vivo sensors or tissue regeneration.
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