Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 21: Poster I

MA 21.83: Poster

Dienstag, 13. März 2018, 09:30–13:00, Poster A

Motion Characteristics of Exchange Bias Capped Janus Particles in Dynamic Magnetic Stray Field Landscapes — •Andreea Tomiţa, Rico Huhnstock, Meike Reginka, Dennis Holzinger, and Arno Ehresmann — Department of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel

Transport systems and self-propelled particles offer interesting prospects for research in a wide spectrum of applications like biomedicine, sensors and lab-on-a-chip devices. The system that we propose takes a novel approach by combining the multifunctionality of Janus particles with the strict control and confinement of their locomotion in an artificial magnetic field landscape. The Janus particles are fabricated to have a magnetic cap made of an exchange bias thin film system and a non-magnetic material respectively, in this case the later being silica, a material with high functionalization potential. This allows for the distinct study of the Janus particles’ coupled translational-rotational transition and motion dynamics when exposed to dynamically changing magnetic stray field landscapes. The asymmetry of the particles, combined with the magnetic field landscape of the substrate, creates the possibility of a tailored assembly of several particles pointing in a direction dictated by the power-balance of the forces acting on them.