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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 51: Poster Session III-2
CPP 51.2: Poster
Dienstag, 17. März 2020, 14:00–16:00, P2/EG
The effect of magnetic field and hydrogen peroxide on capped Janus particles — •Yara Alsaadawi1, Anna Eichler-Volf1, Michael Heigl2, 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, Augsburg 86159, Germany
Janus particles are one type of artificial microswimmers consisting of two asymmetrically functionalized surfaces. With proper manipulation, one can control their displacement from one point to another at certain rate, as well as clustering, and orientation. In this work, we prepared Janus particles with caps consisting of Co/Pd, providing magnetic and H2O2-catalytic activity for particle propulsion, respectively. To employ both mechanisms, we conducted a systematic work that investigates propulsion under different combination of H2O2 concentrations and magnetic fields. Since the magnetic element in the cap plays a critical role in cap orientation and interaction with one another, we studied one particle system as well as two- and three-particle systems. Furthermore, as the swimming behavior is highly affected by the boundary conditions of its surrounding environment, varying surface properties were incorporated during experiments.