Towards a programmable microfluidic valve: Formation dynamics of two-dimensional magnetic bead arrays in transient magnetic fields

Wittbracht F, Eickenberg B, Weddemann A, Hütten A (2011)
Journal of Applied Physics 109(11).

Journal Article | Published | English

No fulltext has been uploaded

Abstract
The induction of dipolar coupling has proven to allow for the initiation of self-assembled, reconfigurable particle clusters of superparamagnetic microbeads suspended in a carrier liquid. The adjustment of the interplay between magnetic and hydrodynamic forces opens various possibilities for guiding strategies of these superstructures within microfluidic devices. In this work, the formation dynamics of such particle clusters under the influence of a rotating magnetic field are studied. Different agglomeration regimes are characterized by the dimensionality of the confined objects. The growth dynamics of the obtained agglomerates are analyzed quantitatively in order to deduce the microscopic growth mechanisms. The growth of two-dimensional clusters is governed by the addition of bead chains to previously formed agglomerates. Time scales for the cluster growth are characterized by the chain dissociation rate. Based on the experimental findings, we may conclude to a linear dependence of the chain dissociation rate on the rotation frequency of the applied magnetic field. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3582133]
Publishing Year
ISSN
PUB-ID

Cite this

Wittbracht F, Eickenberg B, Weddemann A, Hütten A. Towards a programmable microfluidic valve: Formation dynamics of two-dimensional magnetic bead arrays in transient magnetic fields. Journal of Applied Physics. 2011;109(11).
Wittbracht, F., Eickenberg, B., Weddemann, A., & Hütten, A. (2011). Towards a programmable microfluidic valve: Formation dynamics of two-dimensional magnetic bead arrays in transient magnetic fields. Journal of Applied Physics, 109(11).
Wittbracht, F., Eickenberg, B., Weddemann, A., and Hütten, A. (2011). Towards a programmable microfluidic valve: Formation dynamics of two-dimensional magnetic bead arrays in transient magnetic fields. Journal of Applied Physics 109.
Wittbracht, F., et al., 2011. Towards a programmable microfluidic valve: Formation dynamics of two-dimensional magnetic bead arrays in transient magnetic fields. Journal of Applied Physics, 109(11).
F. Wittbracht, et al., “Towards a programmable microfluidic valve: Formation dynamics of two-dimensional magnetic bead arrays in transient magnetic fields”, Journal of Applied Physics, vol. 109, 2011.
Wittbracht, F., Eickenberg, B., Weddemann, A., Hütten, A.: Towards a programmable microfluidic valve: Formation dynamics of two-dimensional magnetic bead arrays in transient magnetic fields. Journal of Applied Physics. 109, (2011).
Wittbracht, Frank, Eickenberg, B., Weddemann, Alexander, and Hütten, Andreas. “Towards a programmable microfluidic valve: Formation dynamics of two-dimensional magnetic bead arrays in transient magnetic fields”. Journal of Applied Physics 109.11 (2011).
This data publication is cited in the following publications:
This publication cites the following data publications:

Export

0 Marked Publications

Open Data PUB

Web of Science

View record in Web of Science®

Search this title in

Google Scholar