Rik Drummond-brydson

Vendredi 15 novembre à 09h00 - Studying the crystallization of inorganic materials using correlated transmission electron microscopy

 
Professor Rik Drummond-Brydson,
School of Chemical and Process Engineering
University of Leeds

Website: https://eps.leeds.ac.uk/chemical-engineering/staff/155/professor-rik-drummond-brydson

https://univ-nantes-fr.zoom.us/j/86003895712?pwd=W236bvKLJbAl8BLfYbaC9sM9zJxUrs.1
ID de réunion: 860 0389 5712
Code secret: 535785

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Abstract

Complex, electron-beam sensitive systems include organic crystals, polymers, hybrid organic-inorganic materials, some inorganic materials such as hydrates, as well as multiphase solid/liquid and solid/gas systems. Arguably they constitute the majority of systems of current interest across a wide range of scientific and engineering disciplines. We review the use of analytical transmission electron microscopy (TEM) for the characterisation of such beam-sensitive materials and complex, multiphase systems in-situ or close to their native state.

As examples of the analysis of a complex electron-beam sensitive system, we describe studies of the transformation between different calcium sulfate polymorphs (bassanite and gypsum) as well as the early stages of the aqueous crystallization process in both the calcium sulfate and calcium carbonate systems using a correlated approach: a combination of in-situ liquid cell TEM (LCTEM), in-situ Raman spectroscopy and cryogenic TEM (cryo-TEM). These findings are compared to conventional TEM studies using a range of differing preparation methods to arrest the crystallization reaction and dry the sample for analysis in the microscope vacuum.

References

M. Ilett et al., J. Microscopy 2022, 288 : 155-168. doi: 10.1111/jmi.13102
M. Ilett et al., J. Microscopy 2024 : 295: 215-299, doi.org/10.1111/jmi.13300

Contact : Philippe Moreau (ST2E)