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doi:10.22028/D291-33978
Title: | In situ investigation of temperature induced agglomeration in non-polar magnetic nanoparticle dispersions by small angle X-ray scattering |
Author(s): | Appel, Christian Kuttich, Björn Kraus, Tobias Stühn, Bernd |
Language: | English |
Title: | Nanoscale |
Volume: | 13 |
Issue: | 14 |
Startpage: | 6916 |
Endpage: | 6920 |
Publisher/Platform: | RSC |
Year of Publication: | 2021 |
Publikation type: | Journal Article |
Abstract: | Non-polar magnetic nanoparticles agglomerate upon cooling. This process is followed by in situ small angle X-ray scattering to assess structural properties of the emerging agglomerates. On the length scale of a few particle diameters, no differences are found between the agglomerates of small (d = 12 nm) and large (d = 22 nm) nanoparticles. Hard-sphere like random packing with a local packing fraction of η = 0.4 is seen. On larger length scales, small particles form compact superstructures, while large particles arrange into agglomerates that resemble chain-like structures in SAXS. This can be explained by directed magnetic dipole interactions that dominate larger particles, while isotropic van der Waals interaction governs the agglomeration of smaller particles. |
DOI of the first publication: | 10.1039/D0NR08434D |
URL of the first publication: | https://pubs.rsc.org/en/content/articlelanding/2021/NR/D0NR08434D#!divAbstract |
Link to this record: | hdl:20.500.11880/31282 http://dx.doi.org/10.22028/D291-33978 |
ISSN: | 2040-3372 2040-3364 |
Date of registration: | 7-May-2021 |
Faculty: | NT - Naturwissenschaftlich- Technische Fakultät |
Department: | NT - Chemie |
Professorship: | NT - Prof. Dr. Tobias Kraus |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
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