Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 16: Poster: Colloids and Complex Liquids

CPP 16.5: Poster

Dienstag, 27. März 2012, 18:15–20:45, Poster A

Shape dependence of active Brownian particles — •Felix Kümmel — Universität Stuttgart, Stuttgart, Germany

We recently introduced a new species of active Brownian particles whose active motion is due to the local demixing of a critical binary liquid mixture and can be easily tuned by illumination [1]. Here, we focus on the shape dependence of such active swimmers, which are prepared by soft lithography. For chiral swimmers, we observe circular trajectories whose orientation depends on their chirality. When such particles come close to a straight wall, there are two different kinds of interaction. In one case, the particle slides stable along the wall, while in the other case it is reflected. In addition, other shapes of swimmers are investigated.

[1] G. Volpe, I. Buttinoni, D. Vogt, H.J. Kümmerer, and C. Bechinger. Microswimmers in patterned environments. Soft Matter, (7):8810{8815, 2011.