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Specialized iNANO Lecture: Quantitative Investigation of Nanomaterials using Advanced Transmission Electron Microscopy

Dr. Roland Kröger, Department of Physics, University of York, UK

Info about event

Time

Wednesday 9 August 2017,  at 13:15 - 14:00

Location

iNANO Auditorium (1593-012), Gustav Wieds Vej 14, 8000 Aarhus C

Dr. Roland Kröger, Department of Physics, University of York, UK 

Quantitative Investigation of Nanomaterials using Advanced Transmission Electron Microscopy

Advanced electron microscopy is at the forefront of characterising and engineering materials across a large range of disciplines such as Materials Physics, Chemistry, Health Science, Geology and others. In this context aberration corrected transmission electron microscopy, tomography and in situ techniques such as liquid cell TEM have become major break-throughs enabling us to understand the atomic level make-up of complex nanomaterials and their chemistry, their three-dimensional arrangement and the dynamics of their formation and interaction. To illustrate these applications my presentation will focus on three subjects:

• The oxidation mechanism of cluster-deposited iron nano-particles revealing a new transport mechanism investigated by aberration corrected scanning transmission electron microscopy (STEM),

• The nanometer-level assembly of hydroxyapatite in human bone uncovering the fractal-like nature of the bone hierarchical structure from the atomic level on studied by STEM tomography,

• The dynamics of highly supersaturated calcium carbonate solutions in reverse micro-emulsions stabilised by confinement and examined by liquid cell STEM.

I will show that a quantitative evaluation of the obtained visual and spectroscopic data provides unprecedented insights into the structure and dynamics of nanomaterials and is hence key for the future of Materials Science and Engineering.

Host: Associate professor Henrik Birkedal, iNANO & Department of Chemistry, Aarhus University