Dresden 2020 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 16: Poster IV
BP 16.13: Poster
Dienstag, 17. März 2020, 14:00–16:00, P2/EG
Anisotropic exclusion effect between photocatalytic Ag/AgCl Janus particles and passive beads in a dense colloidal matrix — •Tao Huang1,2, Xu Wang2, Vyacheslav Misko3,4, Franco Nori3, Jürgen Fassbender2, Denys Makarov2, Gianaurelio Cuniberti1, and Larysa Baraban1,2 — 1TU Dresden, Dresden, Germany — 2Helmholtz-Zentrum Dresden-Rossendorf e.V. — 3RIKEN Cluster for Pioneering Research, Saitama, Japan — 4Vrije Universiteit Brussel, Brussels, Belgium
Synthetic nano- and micromotors interact with each other and their surroundings in a complex manner. Here, we report on the anisotropy of the active-passive particles interaction in a soft matter system containing an immobile yet photochemical Ag/AgCl-based Janus particle embedded in a dense matrix of passive beads in pure water. The asymmetry in the chemical gradient around the Janus particle, triggered upon visible light illumination, distorts the isotropy of the surrounding electric potential and results in the repulsion of adjacent passive beads to a certain distance away from the Janus particle. This exclusion effect is found to be anisotropic with larger distances to passive beads in front of the Ag/AgCl cap of the Janus particle. We provide an insight into this phenomenon by performing the angular analysis of the radii of exclusion and track their time evolution at the level of a single bead.[1,2] 1. X. Wang. et al., Small,1803613 (2018). 2. X. Wang. et al., Small,1802537 (2018).