Regensburg 2025 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 13: Active Matter III (joint session DY/BP/CPP)

BP 13.8: Vortrag

Dienstag, 18. März 2025, 11:45–12:00, H47

Self-assembly and control of active and passive triblock Janus colloids — •Juri Franz Schubert, Salman Fariz Navas, and Sabine H. L. Klapp — Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin

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 [2,3,4]. However, investigating the self-assembly of such systems via Brownian Dynamics can result in timescales inaccessible to brute force simulations, often requiring complex sampling techniques [3]. Recently, it has been shown that introducing self-propulsion can significantly accelerate self-assembly and enhance the Kagome yield [4]. Here, we study the model introduced in [4] and further investigate the self-assembled structures in active and passive systems. Using simple time-dependent activity protocols, we are able to sample a temperature-density state diagram of the passive system. Our results closely match with earlier studies [2,3], where different triblock models and sampling techniques were used.

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

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

[3] K. Bahri, H. Eslami, and F. Müller-Plathe, JCTC 18, 1870 (2022).

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

Keywords: Self-assembly; Self-propulsion; Brownian-Dynamics; control; Kagome