TY  - INPR
U1  - Preprint
A1  - Appel, Christian
A1  - Kuttich, Björn
A1  - Kraus, Tobias
A1  - Stühn, Bernd
T1  - In-situ investigation of temperature induced agglomeration in non-polar magnetic nanoparticle dispersions by small angle X-ray scattering
T2  - arXiv
N2  - 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.
KW  - soft condensed matter
Y1  - 2020
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-5784
U6  - https://doi.org/10.48550/arXiv.2011.13326
DO  - https://doi.org/10.48550/arXiv.2011.13326
SP  - 1
EP  - 5
ET  - version 1
ER  -