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Complementary 2D/3D Imaging of Functional Materials using X-ray & Electron Microscopy

Fam, Yakub

Abstract (englisch):
Catalysts and other functional materials are generally hierarchically structured materials. Hence, the detailed
characterization at different length scales, and especially under reaction conditions, are necessary
to unravel their mechanisms and to improve their performance and catalytic activities. Besides, a combination
of several techniques is required to acquire complementary information owing to the lack of a
single technique able to cover all the length scales. With respect to length, the best way to investigate is
by microscopy either in 2D or more preferably in 3D. The work began with an exploration of three different
3D imaging techniques, i.e. ptychographic X-ray computed tomography, electron tomography, and
focused ion beam slice-and view. Using nanoporous gold as the model, this study aimed to exhibit the
versatility of 3D microscopy as a method beyond imaging as well as to confirm the necessity of complementary
nature between them, where electron offers better spatial resolution and X-ray provides larger
field of view. The study then continued by utilizing ptychographic X-ray computed tomography for quasi
in situ thermal treatment of the same materials under atmospheric pressure. ... mehr

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Volltext §
DOI: 10.5445/IR/1000106000
Frei zugänglich ab 31.12.2020
Zugehörige Institution(en) am KIT Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Hochschulschrift
Publikationsdatum 17.03.2020
Sprache Englisch
Identifikator KITopen-ID: 1000106000
Verlag Karlsruhe
Umfang XVII, 102 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Chemie und Biowissenschaften (CHEM-BIO)
Institut Institut für Technische Chemie und Polymerchemie (ITCP)
Prüfungsdatum 13.12.2019
Referent/Betreuer Prof. J.-D. Grunwaldt
Projektinformation MicTomoCat (BMBF, 05K16VK1)
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