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prof.dr.ir. L. Abelmann (Leon)

Honorary Professor

About Me

My expertise lies in magnetostatics on the micro- and nanoscale. As a PhD student and postdoc, I worked mainly in the area of magnetic data storage, moving from tape recording to magnetic force microscopy, magnetic patterned media and probe storage. When the magnetic recording industry left Europe entirely, I changed my research field towards magnetostatics in combination with fluids.

Expertise

Silicon
Sensors
Fabrication
Magnetic Force Microscopy
Thin Films
Self Assembly
Magnetic Fields
Thin Films

Research

I currently address two main fields.

Magnetism in life sciences

Magnetotactic BacteriumMagnetism combines well with organisms, since magnetic fields penetrate in most aqueous solutions and hardly interact with bio-chemical processes. Magnetic fields can for instance be used to apply forces and torques (using either magnetic particles or non-magnetic particles in magnetic fluids), to heat magnetic particles by induction or to detect their presence. My research team combines magnetic fields with microfluidic systems to study fundamental behavior of magnetic particles in solutions, or non-magnetic particles in magnetic solutions and to apply this in life sciences. Of special interest are magneto-tactic bacteria, which are self-propelling and can be controlled without having to apply large magnetic field gradients. We study manipulation of individual magneto-tactic bacteria inside micro-fluidic systems as model systems for future self-propelled medical micro-robots.

Magnetically assisted three-dimensional self-assembly

Self-assembled memoryAs mind-blowing as the achievements of lithography based micro-fabrication may be, the techniques remain essentially two-dimensional. In MEMS, this severely limits our design capabilities, especially for out-of-plane structures. In micro-electronics and data storage we will hit a fundamental limit on miniaturisation when the size of bits or electric connections reaches atomic dimensions. The only way forward is towards the third dimension, and in my opinion three-dimensional self-assembly is the only viable option on the long term. In self-assembly, the properties of the individual particles determine the final structure of the assembly. In my team, we use magnetism to tailor the interacting forces between particles, using either magnetic particles or non-magnetic particles in magnetic fluids. We transfer fundamental knowledge obtained at the millimeter scale to the micro- and nano-domain, and are especially interested in particles with low symmetry.

Publications

Recent
Solsona, M., Eijkel, J. C. T., Olthuis, W., Papadimitriou, V., van den Berg, A., Abelmann, L., ... Nieuwelink, A. E. (2017). Concentration Polarization to Measure Nano-pore Accessibility. Paper presented at 21st International Conference on Miniaturized Systems for Chemistry and Life Sciences, μTAS 2017, Savannah, United States.
Solsona, M., Nieuwelink, A. E., Odijk, M., Meirer, F., Abelmann, L., Olthuis, W., ... van den Berg, A. (2017). Magnethophoretic sorting of fluid catalytic cracking particles. In A. Lee, & D. DeVoe (Eds.), 21st International Conference on Miniaturized Systems for Chemistry and Life Science (pp. 1633-1634). Savannah: Chemical and Biological Microstystems Society.
Ipparthi, D., Hageman, T. A. G., Cambier, N., Sitti, M., Dorigo, M., Abelmann, L., & Mastrangeli, M. (2017). Kinetics of 2D constrained orbitally-shaken particles.
Khalil, I. S. M., Tabak, A. F., Hageman, T., Ewis, M., Pichel, M., Mitwally, M. E., ... Sitti, M. (2017). Near-surface effects on the controlled motion of magnetotactic bacteria. In ICRA 2017 - IEEE International Conference on Robotics and Automation (pp. 5976-5982). [7989705] Institute of Electrical and Electronics Engineers Inc.. DOI: 10.1109/ICRA.2017.7989705
Löthman, P. A., Janson, T. G., Klein, Y. P., Blaudszun, A-R., Ledwig, M., & Abelmann, L. (2017). Microfabrication and Magnetic Particle Spectrometry of Magnetic Discs. International Journal on Magnetic Particle Imaging (IJMPI), 3(2), [1707001].
Pan, L., Park, B. C., Ledwig, M., Abelmann, L., & Kim, Y. K. (2017). Magnetic Particle Spectrometry of Fe3O4 Multi-granule Nanoclusters. IEEE transactions on magnetics, 53(11), [5101004]. DOI: 10.1109/TMAG.2017.2701904

UT Research Information System

Google Scholar Link

Education

Leon Abelmann was very active in education in the Electrical Engineering and Advanced Technology programs, as well as the Honours Program of the University of Twente. He was nominated teacher of the year for Electrical Engineering from 2002 to 2011, only interupted in 2010, and was recipient of the price in 2005. He received the best teacher award for the Advanced Technology bachelor program in 2010, and the award for excellent education by the TNW department in 2012.

Education pages

Affiliated Study Programmes

Bachelor

Contact Details

Visiting Address

University of Twente
Faculty of Electrical Engineering, Mathematics & Computer Science
Carré (building no. 15), room 3415
Hallenweg 23
7522NH  Enschede
The Netherlands

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Mailing Address

University of Twente
Faculty of Electrical Engineering, Mathematics & Computer Science
Carré  3415
P.O. Box 217
7500 AE Enschede
The Netherlands

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