Berlin 2018 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 25: Active Matter DY III (joint session DY/CPP/BP)
BP 25.12: Vortrag
Mittwoch, 14. März 2018, 18:30–18:45, BH-N 243
High-motility visible light-driven AgCl Janus microswimmers interacting with passive beads — •Xu Wang1, Larysa Baraban2, Annie T. Phuong Nguyen2, Jin Ge1, Vyacheslav Misko3, Gianaurelio Cuniberti2, Jürgen Faßbender1, and Denys Makarov1 — 1Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany — 2Dresden University of Technology, 01062 Dresden, Germany — 3Universiteit Antwerpen, B-2020 Antwerpen, Belgium
Visible light driven nano/micro swimmers are promising candidates for different applications. However, the previous obtained mean squared displacement (MSD) values are low (up to 200 squared micrometers (10 s)) even under the favorable UV light illumination.[1,2] This is a severe drawback for the applications where the efficient transport of microswimmers is demanded.
We demonstrate AgCl based spherical Janus microswimmers reveal an efficient propulsion under blue (visible) light (λ=450-490 nm)illumination. The proper design of a AgCl based microswimmer can boost the MSD to 3000 squared micrometers (10 s) in pure H2O. We investigate the motion of individual Janus particles as well as their small (3-particles) and large (many particles) clusters. With experimental results and numerical simulations ( by Langevin equations), we provide an insight into the collective behavior of the Janus microswimmers surrounded by polystyrene (PS) beads.
1. Angew.Chem.Int.Ed. 2009,48,3308. 2. ChemNanoMat 2017,3,65.