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Magnetic Materials

Prof. Dr. Leon Abelmann, Dr. Bo Hyun Ryu, Dr. Nuriye Korkmaz
Magnetism 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.
The magnetics team combines magnetic fields with in (micro-)fluidic systems to study fundamental behavior of magnetic objects such as nanoparticles, genetically engineered bacteria and phages in solutions and to apply this knowledge in the field of bio-sensors and materials such as bio-crystals.

Figure: Magneto-tactic bacteria can be steered to a specific location by an external magnetic field.
They are envisioned for environmental monitoring and targeted drug delivery.

Figure: Filamentous bacteriophages (virus particles) are naturally occurring biomaterials which can only infect bacteria.
The fd- bacteriophage is a member of filamentous phages (1 µm in length and 6 nm in diameter) and it is composed of a circular single stranded DNA packed in a protein cage. Ease of genetic modification makes fd- phages programmable templates for biomaterials research.

References

"Using magnetic levitation for 2D and 3D selfassembly of cubic silicon macroparticles" Woldering, L.A.; Been, A.J.; Alink, L.:Abelmann, L., Physica status solidi RRL, 10(2), 176-184
"Residual stress and Young's modulus of pulsed laser deposited PZT thin films: Effect of thin film composition and crystal direction of Si cantilevers" Nazeer, H.; Nguyen, M. D.; Rijnders, A.J.H.M.; Abelmann, L.; Sardan Sukas, O., Microelectronic Engineering, 161, 56-62
"Angiogenic Type I Collagen Extracellular Matrix Integrated with Recombinant Bacteriophages Displaying Vascular Endothelial Growth Factors" Yoon, J.; Korkmaz Zirpel, N.; Park, H.-J.; Han, S.; Hwang, K.H.; Shin, J.; Cho, S.W.; Nam, C.H.; Chung, S., Advanced Healthcare Materials, 5, 205-212
"Yeast (Saccharomyces cerevisiae) polarizes both M-CSF and GM-CSF differentiated macrophages towards an M1-like phenotype," Seif, M.; Philippi, A.; Breinig, F.; Kiemer, A.K.; Hoppstädter, J., Inflammation
"Let's twist again: elasto-capillary assembly of parallel robbons" Legrain, A, Berenschot, JW, Abelmann, L, Bico, J, Tas, NR Soft Matter, 12, 7186 (2016)
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