Probing the Structure and Dynamic Behaviors of Nanostructured Materials with Atomic Resolution in Real Time
Department of Chemical Engineering and Materials Science and Department of Physics and Astronomy
University of California – Irvine
As advances in aberration-corrected transmission electron microscopy (TEM) have enabled the determination of the three-dimensional structure and local electronic properties of nanostructures with the sub-angstrom resolution, the recent development of in situ TEM techniques allows one to study the dynamic response of defects and interfaces to applied fields and changes in environments, while the atomic structure is imaged directly. In this talk, I will present our recent work on in situ TEM studies of the atomic structure, local electronic properties, and dynamic behaviors of nanostructured functional materials, including the nucleation and growth of ferroelectric domains during switching under applied electrical field or mechanical stress, oxidation/reduction of self-regenerating catalysts within a gas-reaction holder, and structural evolution of Li-ion battery materials, and filament formation in resistance switching memories.
Xiaoqing Pan is a Professor and Henry Samueli Endowed Chair in Engineering, in Department of Chemical Engineering & Materials Science and Department of Physics & Astronomy at UC Irvine. He is also the inaugural Director of the Irvine Materials Research Institute (IMRI). Before moving to UC Irvine, Pan was the Richard F. and Eleanor A. Towner Professor of Engineering in Department of Materials Science and Engineering, and also Director of Electron Microbeam Analysis Laboratory at the University of Michigan, Ann Arbor. Pan's research interests center on understanding the atomic-scale structure-property relationships of advanced functional materials, including oxide electronics, ferroelectrics and multiferroics, and catalysts. He is recognized internationally for his work in electron microscopy, that has led to the discovery of new properties and novel functionalities in these technologically important materials. Pan has received awards including the National Science Foundation’s CAREER Award and the Chinese NSF’s Outstanding Young Investigator Award. Pan is a Fellow of the American Ceramic Society in 2011, a Fellow of the American Physical Society in 2013, and a Fellow of the Microscopy Society of America in 2014. Pan has published over 300 scientific papers and given more than 150 invited talks or keynote presentations at national/international conferences.