Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 12: Poster: Colloids and Complex Fluids

CPP 12.8: Poster

Montag, 7. März 2016, 18:15–21:00, Poster B2

Influence of Polymer Brush Coated Substrate on the Active Motion of Janus Particles — •Mojdeh Heidari, Stefan Wellert, and Regine von Klitzing — Stranski Laboratorium für Physikalische und Theoritische Chemie, Inst. für Chemie TU Berlin, Straße des 17. Juni, 10623 Berlin, Germany

Au-polystyrene Janus particles demonstrate a thermophoretic induced motion under laser illumination (λ=532 nm). In this study we explore the 2D self-propulsion of Janus particles between two glass substrates. The substrate is functionalized with polymer brushes, as it is hypothesized that the lubricative nature of brushes will reduce the friction coefficient of the substrate which subsequently has a significant influence on the motion of particles close to the substrate. Hence, polymer brushes with varied grafting densities and thicknesses have been synthesized and the corresponding elastic properties have been characterized using colloidal probe AFM. Trajectories of particles are represented under different laser intensities.