The Fall 2023 MatSE 590 for graduate students consists of an exciting and jam-packed schedule. MATSE 590 is a colloquium (1-3 credits) consist of a series of individual lectures by faculty, students, or outside speakers.
Graduate students will receive a weekly email with information via @psu.edu email. Graduate students are required to attend all 590 Seminars. If you have any questions, please email GradOffice@matse.psu.edu.
Graduate Student Convocation
Program overview presented by Prof. Darren Pagan
CAPS (Counseling & Psychological Services)
October 5, 2023 - "Functional Imaging at the Atomic Scale"
Robert F Klie, Professor and Department Head of Physics, University of Illinois Chicago
Abstract
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 how the TEM instrumentation has evolved over the last two decades providing state-of-the-art atomic-resolution characterization capabilities for a wide range of materials applications, including novel multi-valent ion batteries, thin-film solar cells, novel high-Tc superconductors and 2-dimensional materials. In particular, I will demonstrate how the combination of cryo-STEM and high-resolution electron energy-loss spectroscopy (EELS) has led to the discovery of novel 1-dimensial lepidocrocite TiO2 nano-filaments with intriguing intercalation and optical properties, as well as our recent demonstration of direct synthesis of single-terminated MXenes using thin-film synthesis approaches, with surface-group dependent superconducting behaviors. I will conclude by presenting a vision for the future of electron microscopy, including new instrument designs that will allow for unprecedented imaging and spectroscopy conditions at the sample and will also enable novel operando multi-modal methods.
Biographical Information
Robert F. Klie is a Professor and current Head of the Department of Physics at the University of Illinois – Chicago. As an experimental condensed matter physicist, his research focuses on atomic-resolution imaging and spectroscopy of complex functional materials and interfaces using aberration-corrected scanning transmission electron microscopy (STEM). In recent years. Dr. Klie has pioneered novel in-situ approaches to studying water, hybrid-materials systems and solid-liquid interfaces using graphene liquid cells, cryo-STEM and ultra-high resolution electron energy-loss spectroscopy (EELS). Dr. Klie has published over 230 peer-reviewed papers with more than 10,500 citations with an h-index of 51. He has given more than 90 invited talks at prestigious international conferences, and 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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