Berlin 2024 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 32: Poster: Active Matter, Soft Matter, Fluids

DY 32.14: Poster

Mittwoch, 20. März 2024, 15:00–18:00, Poster C

Controlling the self aggregation of active triblock Janus colloids — •Juri Schubert, Salman Fariz Navas, and Sabine H. L. Klapp — ITP, Technische Universität Berlin, Germany

Triblock Janus colloids belong to the family of patchy particles, interacting with hydrophobic attraction at opposite poles and electrostatic repulsion in the equatorial region. They are known to self assemble into a colloidal kagome crystal from experiments [1] and theory [2]. Such structures are of particular interest owing to their novel optical and mechanical properties. However, the self-assembly of open-cell lattices is a multistep process involving the formation of intermediate competing structures resulting in long time-scales. Recently, it has been shown that introducing activity can significantly accelerate the self assembly and enhance the kagome yield [3].

Here, we study the model introduced in [3] and build upon the results to compare with prior research on Janus particles [2]. Investigating the aggregation pathway, we show preliminary results on the use of time dependent activity protocols to gain better control of the aggregation process.

[1] Q. Chen, S. C. Bae, S. Granick, Nature 469, 7330 (2011).

[2] F. Romano, F. Sciortino, Soft Matter 7, 12 (2011).

[3] S. A. Mallory, A. Cacciuto, JACS 141, 6 (2019).

Keywords: Patchy particles; Self aggregation; Active Matter; Brownian dynamics