Regensburg 2016 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 41: Microswimmers II (Joint Session with DY)

BP 41.1: Vortrag

Mittwoch, 9. März 2016, 11:30–11:45, H45

Interactions of self-thermophoretic swimmers — •Santiago Muiños Landin, Andreas Bregulla, and Frank Cichos — Molecular Nanophotonics, Universität Leipzig, Institut for Experimental Physics I, Linnéstrasse 5, 04103 Leipzig, Germany

Propulsive mechanisms and collective behavior of self propelled microswimmers are interesting and challenging topics which had been studied in different natural and artificial systems during last years. Given that the collective behavior depends on how do these swimmers interact, and the fact that the aspects of these interactions are directly related to their propulsive mechanisms, we can say that these both aspects are coupled. Here we present an experimental method, based on previous own related work[1,2]. The developed Photon Nudging technique allows us to collect a well defined number of self-thermophoretic Janus particles in a small sample volume. Based on this we show results of a free expansion study of an active particle gas in solution which provides information in the mutual interactions between these photophoretic swimmers

[1] B.Qian, D. Montiel, A. Bregulla, F. Cichos, Chem. Science 4, 1420 (2013) [2] A. Bregulla, H. Yang, and F. Cichos, ACS Nano 8(7), 6542 (2014)