Dresden 2017 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 25: Posters - Soft Particles, Microswimmers, Microfluidics
DY 25.11: Poster
Tuesday, March 21, 2017, 18:15–21:00, P3
Random Shaped Magnetic Micropropellers — •Felix Bachmann1, Peter Vach1, Agnese Codutti1, Stefan Klumpp2, Peter Fratzl1, and Damien Faivre1 — 1Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Science Park Golm — 2Theoretical Biophysics, Georg-August-University Göttingen
Swimming at low Reynolds number is a difficult task that diverges from our day by day experience. At the micrometer scale viscous forces play a dominant role and inertia can be neglected. Nature provides us with fascinating solutions for motion at low Reynolds numbers, e.g. swimming E.coli bacteria: moving their flagella in a cork screw manner, they overcome the hindrance of symmetry. Trying to mimic this mechanism, many achievements in designing and producing micro swimmers have been made over the last couple of years. Now the task is to optimize the motion process in this regime: moving fast and being able to control the moving pattern precisely.
In a step towards these goals, experiments with random shaped micropropellers allow exploring new avenues [1]. The characteristics and understanding of those random shaped micropropellers is subject of this work. Of particular interest are the very fast propellers and their morphology visualized through optical microscopy and tomography. Together with propelling characteristics like velocity-frequency dependence and direction pattern, this will help to create design guidelines for future task specific micropropellers.
[1] Vach PJ, Fratzl P, Klumpp S, Faivre D., Fast Magnetic Micropropellers with Random Shapes. Nano Letters. 2015;15(10):7064-7070.