SKM 2021 – wissenschaftliches Programm
CPP 8.1: Poster
Mittwoch, 29. September 2021, 17:30–19:30, P
Janus Particles Self-Assembly: Magnetic and Catalytic Propulsion of Clustered Janus Particles — •Yara Alsaadawi1, Anna Eichler-Volf1, Michael Heigl2, Peter Zahn1, Manfred Albrecht2, and Artur Erbe1 — 1Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — 2Institute of Physics, University of Augsburg, 86159 Augsburg, Germany
Janus particles are one type of artificial microswimmers consisting of two asymmetrically functionalized surfaces. With proper manipulation, one can control their movement from one point to another at certain velocities, as well as clustering, and orientations. In this work, we prepared Janus particles with caps consisting of Co/Pd, providing magnetic and H2O2 catalytic activity for particle propulsion. Due to their magnetic properties, individual particles undergo self-assembly by cap-cap interactions, forming clusters with varying sizes and shapes. Here, we observed clusters of two- and three-janus particles with standard video microscopy. Furthermore, the influence of external magnetic field on a cluster propulsion was studied, as well as the effect of propulsion next to a wall. We reported varying propulsion trajectories, which in turn depend on the number of particles and the cap-cap arrangement within a cluster.