Recent developments in cryo-atom probe tomography
| Dates: | 4 May 2022 |
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| Times: | 13:00 - 14:00 |
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| What is it: | Seminar |
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| Organiser: | Photon Science Institute |
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| Who is it for: | University staff, Current University students |
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| Speaker: | Professor Baptiste Gault |
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Join us for this PSI seminar with guest speaker Professor Baptiste Gault. Atom probe tomography (APT) is a microscopy and microanalysis technique that provides three-dimensional compositional mapping of materials with near-atomic resolution. APT complements more conventional techniques such as transmission electron microscopy or secondary-ion mass spectrometry, as APT can, in principle, detect light elements with the same efficiency as heavier elements with a resolution, in three-dimensions below 1nm. As such, APT can provide information on the distribution of e.g. hydrogen or Li within a material. In this presentation, I will review briefly how atom probe works, and discuss the recent developments in the technique, with an emphasis on cryogenic preparation and specimen transfer protocols that are enabling new frontiers in APT analysis, but also outline some of the inherent challenges.
Speaker
Professor Baptiste Gault
Organisation: Max-Planck-Institut für Eisenforschung GmbH
Biography: I obtained my PhD in physics at the university of Rouen (2007) where I developed a new generation of pulsed-laser atom probe microscopes. I was then a postdoc at The University of Sydney and a Marie-Curie fellowship at Oxford University, and had a a brief stint as Assist. Prof. at McMaster University in Canada. I then interrupted my research career for three years. In January 2016, I became the Group Leader for Atom Probe Tomography at the Max-Planck-Institut für Eisenforschung GmbH, where I was finally promoted to a W2-permanent position in 2020, following the award of the Leibniz Prize by the German Science Foundation. I also hold a joint, part-time appointment as Prof. of atomic-scale characterisation at Imperial College London and since Feb. 2018, hold an ERC-Consolidator grant targeting the analysis of hydrogen in metals by using atom probe tomography.
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