Multiscale Reciprocal Space Mapping of Magnetite Mesocrystals

Chumakova, Aleksandra; Steegemans, Tristan; Baburin, Igor A.; Mistonov, Alexander; Dubitskiy, Ilya S.; Schlotheuber, Julian; Kirner, Felizitas; Sturm, Sebastian; Lubk, Axel; Müller-Caspary, Knut; Wimmer, Ilona; Fonin, Mikhail; Sturm, Elena V. and Bosak, Alexei (2022): Multiscale Reciprocal Space Mapping of Magnetite Mesocrystals. In: Advanced Materials, Vol. 35, No. 2

Abstract

Mesocrystals are a class of nanostructured material, where a multiple-length-scale structure is a prerequisite of many interesting phenomena. Resolving the mesocrystal structure is quite challenging due to their structuration on different length scales. The combination of small- and wide-angle X-ray scattering (SAXS and WAXS) techniques offers the possibility of non-destructively probing mesocrystalline structures simultaneously, over multiple length scales to reveal their microscopic structure. This work describes how high dynamical range of modern detectors sheds light on the weak features of scattering, significantly increasing the information content. The detailed analysis of X-ray diffraction (XRD) from the magnetite mesocrystals with different particle sizes and shapes is described, in tandem with electron microscopy. The revealed features provide valuable input to the models of mesocrystal growth and the choice of structural motif;the impact on magnetic properties is discussed.

• Item Type: Journal article
• Faculties: Geosciences > Department of Earth and Environmental Sciences; Chemistry and Pharmacy > Department of Chemistry
• Subjects: 500 Science > 550 Earth sciences and geology; 500 Science > 540 Chemistry
• ISSN: 0935-9648
• Language: English
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 268730352