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SUMMARY:Scanning Transmission Electron Microscopy of nanoparticle surfaces
  and 2D material interfaces
DTSTART:20190218T131500
DTEND:20190218T141500
DTSTAMP:20260930T193515Z
UID:7c84e55946af044555f7724a9e3355354e4e397071ffafa41139c149
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Sarah Haigh\, Materials Characterisation\, University of
  Manchester UK\n\n\nScanning Transmission Electron Microscopy is one of th
 e most powerful techniques for characterising local information from surfa
 ces and interfaces. To try to convince you of this I will highlight two ex
 amples. The first examines layered stacks of 2D crystals like graphene whe
 re we reveal that exposing materials to air can have a big effect on the i
 nterface we produce [1]. We also consider the interfaces formed when a few
  layer 2D material is bent – demonstrating that the microstructural feat
 ures we observe can be predicted from knowledge of the bend angle and thic
 kness [2]. The second topic considers the surface chemistry of Pt-Ni nanop
 articles\, where we show that even for inorganic nanoparticles that are se
 nsitive to the electron beam we can use biological microscopy approaches t
 o obtain 3D elemental mapping. Our results reveal differences in surface c
 hemistry which could have a big impact on the resulting catalytic properti
 es [3]\n\n \n\n[1] Observing Imperfection in Atomic Interfaces for van d
 er 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 Sar
 ah J. Haigh\n\nNano Lett.\, 2017\, 17 (9)\, pp 5222–5228 https://pubs.
 acs.org/doi/abs/10.1021/acs.nanolett.7b01248\n\n[2] Anomalous twin bounda
 ries in two dimensional materials\, A. P. Rooney\, Z. Li\, W. Zhao\, A. Gh
 olinia\, 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\n\n[3] Imaging Three-Dimensio
 nal Elemental Inhomogeneity in Pt–Ni Nanoparticles Using Spectroscopic S
 ingle Particle Reconstruction\n\nYi-Chi Wang\, Thomas J. A. Slater\, Gerar
 d M. Leteba \, Alan M. Roseman\, Christopher P. Race\, Neil P. Young\, Ang
 us I. Kirkland\, Candace I. Lang\, and Sarah J. Haigh\, Nano Lett.\, 2019\
 , Article ASAP \, DOI: 10.1021/acs.nanolett.8b03768\n\nBio:\n\n\nSarah Hai
 gh is a Professor of Materials Characterisation and Director of the Electr
 on Microscopy Centre at the University of Manchester\, UK. Her research in
 terests 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 wor
 ked as consultant application specialist to JEOL UK. She completed undergr
 aduate and doctorate degrees in Material Science at the University of Oxfo
 rd. She is a freeman of the Armourers and Brasiers Company\, was Chair of 
 the Institute of Physics EMAG group (2016-2018) and EMAG Honorary Secretar
 y 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.\n\n\n
 \n\n
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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