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4 results on '"Julian Schlotheuber"'

1. Multiscale Reciprocal Space Mapping of Magnetite Mesocrystals (Adv. Mater. 2/2023)

Author

Aleksandra Chumakova, Tristan Steegemans, Igor A. Baburin, Alexander Mistonov, Ilya S. Dubitskiy, Julian Schlotheuber, Felizitas Kirner, Sebastian Sturm, Axel Lubk, Knut Müller‐Caspary, Ilona Wimmer, Mikhail Fonin, Elena V. Sturm, and Alexeï Bosak

Subjects
Mechanics of Materials, Mechanical Engineering, General Materials Science
Published
2023

2. Morphogenesis of Magnetite Mesocrystals: Interplay Between Nanoparticle Morphology and Solvation Shell

Author

Helmut Cölfen, Jerome Carnis, Sebastian Sturm, Julian Schlotheuber né Brunner, Mirijam Zobel, Sebastian Polarz, Rose Rosenberg, Sabrina L. J. Thomä, Britta Maier, Felizitas Kirner, Sebastian Theiss, Dameli Assalauova, Young Yong Kim, Horst Borrmann, Axel Lubk, Fabian Westermeier, Dmitry Lapkin, Alexander Eychmüller, Ivan A. Vartanyants, Zhe Ren, Elena V. Sturm, and Igor A. Baburin

Subjects
Materials science, Morphology (linguistics), High interest, General Chemical Engineering, Nanoparticle, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, Solvation shell, chemistry, Chemical engineering, Materials Chemistry, Self-assembly, 0210 nano-technology, Magnetite
Abstract

In this study, faceted mesocrystals have been assembled from the dispersion of truncated cubic-shaped iron oxide nanoparticles stabilized by oleic acid (OA) molecules using the non-solvent “gas phase diffusion technique” into an organic solvent. The effects of synthesis conditions as well as of the nanoparticle size and shape on the structure and morphogenesis of mesocrystals were examined. The interactions of OA capped iron oxide nanoparticles with solvent molecules were probed by analytical ultracentrifugation and double difference pair distribution function analysis. It was shown that the structure of the organic shell significantly depends on the nature and polarity of solvent molecules.

Published
2021

3. Multiscale Reciprocal Space Mapping of Magnetite Mesocrystals

Author

Aleksandra Chumakova, Tristan Steegemans, Igor A. Baburin, Alexander Mistonov, Ilya S. Dubitskiy, Julian Schlotheuber, Felizitas Kirner, Sebastian Sturm, Axel Lubk, Knut Müller‐Caspary, Ilona Wimmer, Mikhail Fonin, Elena V. Sturm, and Alexeï Bosak

Subjects
Mechanics of Materials, Mechanical Engineering, ddc:660, ddc:530, General Materials Science, magnetite, mesocrystals, microscopic structure, multiple-length-scale structures, supercrystallography
Abstract

Advanced materials 2207130 (2022). doi:10.1002/adma.202207130, Published by Wiley-VCH, Weinheim

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4. Multiscale Reciprocal Space Mapping of Magnetite Mesocrystals.

Author

Chumakova A, Steegemans T, Baburin IA, Mistonov A, Dubitskiy IS, Schlotheuber J, Kirner F, Sturm S, Lubk A, Müller-Caspary K, Wimmer I, Fonin M, Sturm EV, and Bosak A

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., (© 2022 The Authors. Advanced Materials published by Wiley-VCH GmbH.)

Published
2023
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