Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Magnetic Particles / Clusters

MA 35.9: Vortrag

Mittwoch, 22. März 2017, 11:30–11:45, HSZ 101

Transport and rotational dynamics of exchange biased Janus particles in artificial magnetic stray field landscapes — •Rico Huhnstock, Andreea Tomiţa, Dennis Holzinger, and Arno Ehresmann — Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel

The investigation of remotely controlled transport of magnetic microparticles above topographically flat substrates is of particular interest for the design of Lab-on-a-chip (LOC) devices, which offer a variety of promising applications in medical diagnostics [1]. In addition to a directed two-dimensional translation of such particles, another degree of freedom for the movement can be found in their rotation properties. In the present study the controlled rotational and translational movement of Janus like colloidal magnetic particles was achieved by the superposition of a static magnetic stray field landscape and a time-dependent external magnetic field sequence. An investigation of the locomotion and the rotational dynamics of the Janus particles was carried out by using tracking and image analysis techniques. The obtained results encourage further experiments for implementing a rotational based transport of the particles and using this method for a biomolecular interaction screening in LOC-applications.

[1] Holzinger, D., Koch, I., Burgard, S., Ehresmann, A. (2015), Directed Magnetic Particle Transport above Artificial Magnetic Domains Due to Dynamic Magnetic Potential Energy Landscape Transformation. ACS Nano, 9: 7323-7331.