Dr. Gianluigi Botton seminar
Dr. Gianluigi Botton, Professor in the Department of Materials Science and Engineering at McMaster University, will deliver a department seminar, "Electron Energy Loss Spectroscopy with High Spatial and High Energy Resolution. Applications on functional materials" on March 21.
Abstract:
Electron energy loss spectroscopy (EELS) is an invaluable technique to study the detailed structure and the chemical state of materials at unprecedented spatial resolution. Today, this technique is used to characterize nanoscale materials used in a myriad of applications from energy storage and conversion, to solid-state devices and biomaterials interfaces. This technique also has the potential to provide insight into much more fundamental problems where information on local unoccupied states (at atomic sites) and site occupancy are of fundamental importance.
This presentation will cover recent developments in EELS to probe the changes in bonding and coordination of atoms using quantitative measurements of the energy loss spectra. It will be shown that, with atomic resolved EELS, it is possible to determine ordering of cations in oxides and extract the localized hole distributions in superconducting chain-ladder compounds and the classic YBCO superconductors. Recent examples will be given on the application of STEM and EELS on energy storage materials (NMC compounds) [1] and 2D van der Waals heterostructure [2].
Finally, it will be also shown that EELS can provide exquisite details on the plasmonic response of simple and very complex metallic nanostructures [3].
References of interest
[1] H. S. Liu et al. Physical Chemistry Chemical Physics 18, 29064-29075. (2016) and H. Liu et al, ACS Nano, 12 (3), pp 2708–2718 (2018) DOI: 10.1021/acsnano.7b08945, Zaker, N; Geng, C; Rathore, D; Hammon, I; Chen, N; Penghao, X; Chongyin, Y; Dahn, JR; Botton GA. (2023). Advanced Functional Materials, 3 February 2023 (doi: https://doi.org/10.1002/adfm.202211178)
[2] H. Zschiesche, et al., Atomic scale chemical ordering in franckeite-a natural van der Waals superlattice J. Physics-Condensed Matter, 34, 055403 (2022) DoI: 10.1088/1361-648X/ac3451z
[3] EP Bellido, et al., ACS Photonics, 3, 428-433 (2016), and ACS Photonics, 4, 1558-1565 (2017); E.P. Bellido, et al., Self-similarity of plasmon edge modes on Koch fractal antennas, ACS Nano, DOI: 10.1021/acsnano.7b05554), (2017). IC Bicket, et al., Hierarchical Plasmon Resonances in Fractal Structures, ACS Photonics, 7, 1246-1254, (2020), DoI: 10.1021/acsphotonics.0c00110, V. Kapetanovic, et al. Advanced Optical Materials, 8, Article number 2001024, (2020), DoI: 10.1002/adom.202001024; MSS Mousavi, et al. Electron energy-loss spectroscopy of surface plasmon activity in wrinkled gold structures, Journal of Chemical Physics, 153, Article number 224703 (2020), DoI: 10.1063/5.0031469, and S. Shayan Mousavi M. , Alexandre Pofelski , Hassan Teimoori & Gianluigi A. Botton, Alignment‐invariant signal reality reconstruction in hyperspectral imaging using a deep convolutional neural network architecture, Scientific Reports, (2022) 12:17462, https://doi.org/10.1038/s41598-022-22264-3
Bio:
Gianluigi Botton received a degree in Engineering Physics and a PhD in Materials Engineering from Ecole Polytechnique of Montréal. He was Postdoctoral Fellow in the Department of Materials Science and Metallurgy at the University of Cambridge from 1993 to 1998. He joined the Materials Technology Laboratory of Natural Resources Canada (NRCan) in 1998 as a research scientist. In 2001 he moved to the Department of Materials Science and Engineering at McMaster University where he holds a Tier 1 Canada Research Chair in Electron Microscopy of Nanoscale Materials. He received the Metal Physics Medal of the Canadian Materials Science Conference (2017), the Lee Hsun Research Award from the Institute Metals Research of the Chinese Academy of Sciences (2017), the Microbeam Analysis Society Presidential Award (2020) and he is Fellow of the Microscopy Society of America and Fellow of the Royal Society of Canada. Prof. Botton established the Canadian Centre for Electron Microscopy-CCEM, a national facility for ultrahigh-resolution microscopy, and was its director for over 11 years. In May 2019, he became the Science Director at the Canadian Light Source, Canada’s synchrotron while he continues to hold is academic appointment and his research at McMaster University. Website: https://www.bottonsgroup.com
