SKM 2021 – wissenschaftliches Programm
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SYAN: Symposium Active nematics: From 2D to 3D
SYAN 1: Active nematics: From 2D to 3D
SYAN 1.1: Hauptvortrag
Freitag, 1. Oktober 2021, 10:00–10:30, Audimax 1
Corrugated patterns made from an active nematic sheet — •Anis Senoussi1, Shunichi Kashida3, Raphaël Voituriez2, Jean-Christophe Galas2, Ananyo Maitra2, and Estevez-Torres André2 — 1ESPCI, Paris, France — 2Sorbonne Université, Paris, France — 3xFOREST Therapeutics, Kyoto, Japan
To what extent can we engineer matter that shapes itself? To investigate this question, we study a 3D solution of multimeric kinesin motors and microtubule filaments. In addition to previously described patterns such as asters and chaotic flows, we report that such a solution can spontaneously form a 2D free-standing nematic active sheet that actively buckles out of plane into a centimeter-sized periodic corrugated sheet in the presence of a depletant. This pattern is stable at low activity and is transient - ultimately breaking into chaotic flows - at higher activities. We demonstrate that the wavelength and dynamics of the corrugations are controlled by the motor concentration and the depletant concentration, in good agreement with a hydrodynamic theory of active fluids. Our results underline the importance of both passive and active forces in shaping active matter and provide some insights on how active fluids can be sculpted into a static material through an active mechanism.