Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 7: Bulk Magnetic Materials and Magnetic Particles/Clusters

MA 7.8: Vortrag

Montag, 18. März 2024, 11:30–11:45, EB 407

Controlled transport of 3D anisotropic brick-shaped particles using dynamic magnetic field landscapes for Lab-on-Chip (LOC) applications — •Jonas Bugase, Christian Janzen, Arne Vereijken, Rico Huhnstock, and Arno Ehresmann — Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, 34132 Kassel

The controlled interaction of magnetic colloids amongst themselves and with surfaces in the presence of magnetic fields proves to be a valuable tool for studying and manipulating complex biological systems in microfluidic devices [1]. We present a remote-controlled transport mechanism for 3D elongated bricked-shaped magnetic particles, fabricated using two-photon polymerization (2PP) lithography. These particles are thoroughly characterized in terms of their sizes and magnetic properties. The magnetic moment of the polymer brick particles is fixed along the lateral axis by sputtering a magnetic Exchange Bias (EB) thin film system on its surface. The transport occurs within a periodic stray field landscape, artificially created by opposing domain stripe through ion bombardment induced magnetic patterning (IBMP) [2]. We discuss the influence of particle geometry and size in relation to the periodicity of the underlying domain pattern on the transport behavior. This transport mechanism is promising for the detection of biomolecules in Lab-on-Chip devices [3].

[1] Afsaneh et al. (2022), Talanta Open, (5): 100092.

[2] Ehresmann et al. (2015), Sensors, (15): 28854.

[3] Lowensohn et al. (2020), Langmuir, (36): 7100.

Keywords: Particle transport; 2-photon polymerization (2PP) lithography; Magnetic landscapes; Magnetic patterning; Lab-on-Chip devices