论文标题
极性手性活跃椭圆形中的新兴立体选择性相互作用和自我认识
Emergent Stereoselective Interactions and Self-recognition in Polar Chiral Active Ellipsoids
论文作者
论文摘要
在许多活跃物质系统中，粒子轨迹具有明确的惯用性或手性。这种手性活性是否可以引入颗粒之间的立体选择性相互作用。在这里，我们制定了一种策略，以调整3D打印的颗粒椭圆形的手性活动的性质，而不会改变其形状或大小。在这些颗粒的垂直搅拌的单层中，我们根据配对单体的手性观察了两种类型的二聚体。杂毒素二聚体集体作为单个ACHIRAL活性单元进行，而同型病毒二聚体则形成了翻译不动的旋转器。在活跃的外围混合物中，前者比后者表明立体选择性更丰富。通过二聚体寿命的测量，我们为具有不同手性活性的颗粒混合物中的手性自我识别提供了令人信服的证据。我们最终表明，仅将密集的活性液体的净手性从种族混合物从根本上改变其集体放松的本质，从而改变了对照液。
In many active matter systems, particle trajectories have a well-defined handedness or chirality. Whether such chiral activity can introduce stereoselective interactions between particles is not known. Here we developed a strategy to tune the nature of chiral activity of 3D-printed granular ellipsoids without altering their shape or size. In vertically agitated monolayers of these particles, we observed two types of dimers form depending on the chirality of the pairing monomers. Heterochiral dimers moved collectively as a single achiral active unit, while homochiral ones formed a translationally immobile spinner. In active racemic mixtures, the former was more abundant than the latter indicating stereoselectivity. Through dimer lifetime measurements, we provide compelling evidence for chiral self-recognition in mixtures of particles with different chiral activities. We finally show that changing only the net chirality of a dense active liquid from a racemic mixture to an enantiopure liquid fundamentally alters its nature of collective relaxation.
