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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 46: P11: Wetting, Micro and Nano Fluidics

CPP 46.1: Poster

Mittwoch, 18. März 2015, 10:00–13:00, Poster A

Enhanced microfluid mixing due to the near-surface transport of superparamagnetic bead rows — •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

An accurate computational fluid dynamic simulation model is presented for the domain wall movement assisted transport (DOWMAT) of full superparamagnetic bead rows above a micromagnetic stripe-patterned exchange bias layer system for enhanced active mixing in a laminar flow microfluidic device using Comsol Multiphysics.[1,2] The simulation model takes into account the effect of device length scales, the diffusive properties of the diluted species and the applied movement scheme of the superparamagnetic bead rows. The results demonstrate that the maximum achievable mixing velocity strongly depends on the above stated parameters, so that the microfluidic device parameters can be specifically tailored e.g. for biosensing applications in lab-on-a-chip (LOC) devices prior to the experimental implementation.

[1] A. Ehresmann, D. Lengemann, T. Weis, A. Albrecht, J. Langfahl-Klabes, F. Goellner and D. Engel, Adv. Mater. 23, 5568 (2011)

[2] D. Holzinger, D. Lengemann, F. Goellner, D. Engel and A. Ehresmann, Appl. Phys. Lett. 100, 153504 (2012)