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  • Open Access

Estimating the Spatial Orientation of Immobilized Magnetic Nanoparticles with Parallel-Aligned Easy Axes

Martin Möddel1,2,*, Florian Griese1,2, Tobias Kluth3,4, and Tobias Knopp1,2

  • 1Section for Biomedical Imaging, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
  • 2Institute for Biomedical Imaging, Hamburg University of Technology, Hamburg 21073, Germany
  • 3Center for Industrial Mathematics, University of Bremen, Bremen 28359, Germany
  • 4Center for Optimization and Approximation, University of Hamburg, Hamburg 20146, Germany

  • *m.hofmann@uke.de
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Phys. Rev. Applied 16, L041003 – Published 28 October, 2021

DOI: https://doi.org/10.1103/PhysRevApplied.16.L041003

Abstract

Advances in micromachinery and nanotechnology, such as magnetically actuated microrobots for navigating in viscous environments, are important driving forces in medicine. Recently, it has been shown that the spatial orientation of an ensemble of immobilized nanoparticles with parallel-aligned magnetic easy axes has an effect on the magnetization response to an external dynamic magnetic field. Here, we introduce a method that allows us to estimate the spatial orientation of this axis from the magnetization response and experimentally study a potential application scenario.

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Phys. Rev. Applied 16, L041003– Published 28 October, 2021
  • Received 24 February 2021
  • Revised 2 March 2021
  • Accepted 3 September 2021
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