Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 50: Poster Session III
CPP 50.7: Poster
Dienstag, 17. März 2020, 14:00–16:00, P1C
Nanoparticle dynamics in magnetic liquid crystal hybrid materials — •Joachim Landers1, Damian Günzing1, Karin Koch2, Soma Salamon1, Annette M. Schmidt2, and Heiko Wende1 — 1Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen — 2Department of Chemistry, Institute of Physical Chemistry, University of Cologne
By adding magnetic nanoparticles to liquid crystals and liquid crystal elastomers, promising hybrid materials can be prepared, inheriting self-organiziation as well as a strong response to external magnetic fields. We utilize the ability of Mössbauer spectroscopy to provide information on particle dynamics as well as their magnetic alignment to study particle-matrix interaction across liquid crystal phase transitions. Thereby, the effect of self-ordering across the transition to the nematic state on particle dynamics will be analyzed, as well as the possibility of matrix reorientation via a magnetic stimulus. Regarding the possibility to extract direction-resolved particle diffusion coefficients from Doppler line-broadening, preliminary results on aligned anisotropic nanoparticles are discussed, which could represent a valuable approach for the future analysis of these hybrid materials aligned via magnetic or electric fields and other anisotropic soft magnetic composites. Funding by the DFG through SPP 1681 (project WE 2623/7-3 and SCHM1747/10) is gratefully acknowledged.