Scanning Transmission Electron Microscopy of nanoparticle surfaces and 2D material interfaces
Event details
| Date | 18.02.2019 |
| Hour | 13:15 › 14:15 |
| Speaker | Prof. Sarah Haigh, Materials Characterisation, University of Manchester UK |
| Location | |
| Category | Conferences - Seminars |
Scanning Transmission Electron Microscopy is one of the most powerful techniques for characterising local information from surfaces and interfaces. To try to convince you of this I will highlight two examples. The first examines layered stacks of 2D crystals like graphene where we reveal that exposing materials to air can have a big effect on the interface we produce [1]. We also consider the interfaces formed when a few layer 2D material is bent – demonstrating that the microstructural features we observe can be predicted from knowledge of the bend angle and thickness [2]. The second topic considers the surface chemistry of Pt-Ni nanoparticles, where we show that even for inorganic nanoparticles that are sensitive to the electron beam we can use biological microscopy approaches to obtain 3D elemental mapping. Our results reveal differences in surface chemistry which could have a big impact on the resulting catalytic properties [3]
[1] Observing Imperfection in Atomic Interfaces for van der Waals Heterostructures, Aidan. P. Rooney, Aleksey Kozikov, Alexander N. Rudenko, Eric Prestat, Matthew J. Hamer, Freddie Withers, Yang Cao, Kostya S. Novoselov, Mikhail I. Katsnelson, Roman Gorbachev, and Sarah J. Haigh
Nano Lett., 2017, 17 (9), pp 5222–5228 https://pubs.acs.org/doi/abs/10.1021/acs.nanolett.7b01248
[2] Anomalous twin boundaries in two dimensional materials, A. P. Rooney, Z. Li, W. Zhao, A. Gholinia, A. Kozikov, G. Auton, F. Ding, R. V. Gorbachev, R. J. Young & S. J. Haigh, Nature Communications, volume 9, Article number: 3597 (2018), doi.org/10.1038/s41467-018-06074-8
[3] Imaging Three-Dimensional Elemental Inhomogeneity in Pt–Ni Nanoparticles Using Spectroscopic Single Particle Reconstruction
Yi-Chi Wang, Thomas J. A. Slater, Gerard M. Leteba , Alan M. Roseman, Christopher P. Race, Neil P. Young, Angus I. Kirkland, Candace I. Lang, and Sarah J. Haigh, Nano Lett., 2019, Article ASAP , DOI: 10.1021/acs.nanolett.8b03768
Bio: Sarah Haigh is a Professor of Materials Characterisation and Director of the Electron Microscopy Centre at the University of Manchester, UK. Her research interests centre on improving our understanding of nanomaterials properties using advanced transmission electron microscope (TEM) imaging and analysis techniques. Before moving to the University of Manchester in 2010 she worked as consultant application specialist to JEOL UK. She completed undergraduate and doctorate degrees in Material Science at the University of Oxford. She is a freeman of the Armourers and Brasiers Company, was Chair of the Institute of Physics EMAG group (2016-2018) and EMAG Honorary Secretary and Treasurer (2014-2016), a member of council for the RMS (2014-2018) and is on the advisory board for the EPSRC’s SuperSTEM laboratory.
Bio: Sarah Haigh is a Professor of Materials Characterisation and Director of the Electron Microscopy Centre at the University of Manchester, UK. Her research interests centre on improving our understanding of nanomaterials properties using advanced transmission electron microscope (TEM) imaging and analysis techniques. Before moving to the University of Manchester in 2010 she worked as consultant application specialist to JEOL UK. She completed undergraduate and doctorate degrees in Material Science at the University of Oxford. She is a freeman of the Armourers and Brasiers Company, was Chair of the Institute of Physics EMAG group (2016-2018) and EMAG Honorary Secretary and Treasurer (2014-2016), a member of council for the RMS (2014-2018) and is on the advisory board for the EPSRC’s SuperSTEM laboratory.
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Practical information
- General public
- Free
Organizer
- Esther Amstad & Vaso Tileli
Contact
- Esther Amstad & Vaso Tileli