In-situ investigation of temperature induced agglomeration in non-polar magnetic nanoparticle dispersions by small angle X-ray scattering
- 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 = 12nm) and large (d = 22nm) nanoparticles. Hard-sphere like random packing with a local packing fraction of η = 0.4 is seen. On larger length scales, small particle form compact superstructures, while large particles arrange into agglomerates that resemble chain-like structure 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.
| Document Type: | Preprint |
|---|---|
| Author: | Christian AppelORCiD, Björn KuttichORCiD, Tobias KrausORCiD, Bernd StühnORCiD |
| URN: | urn:nbn:de:bsz:291:415-5784 |
| DOI: | https://doi.org/10.48550/arXiv.2011.13326 |
| Parent Title (English): | arXiv |
| Edition: | version 1 |
| First Page: | 1 |
| Last Page: | 5 |
| Language: | English |
| Date of Publication (online): | 2023/04/28 |
| Date of first Publication: | 2020/11/26 |
| Release Date: | 2023/04/28 |
| Tag: | soft condensed matter |
| Scientific Units: | Structure Formation |
| DDC classes: | 500 Naturwissenschaften und Mathematik / 530 Physik |
| Open Access: | Open Access |
| Signature: | INM 2020/157_preprint |
| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
