发表机构
Technische Universität Darmstadt; University of Twente（达姆施塔特工业大学; 特温特大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过实验和模拟证明，纯旋转的磁性主动旋转器可将角动量注入被动胶体，使其形成手性转子团簇并产生边缘流，从而为被动物质赋予手性功能。
AI 中文摘要
主动旋转器在不进行持续平移的情况下将角动量注入其周围环境，提供了一条区别于沿弯曲轨迹运动的自推进粒子的手性活性物质路径。近期研究表明，旋转器流体可以自组织成旋转团簇，并具有粘性奇流体特有的循环边缘流。仅靠角动量注入能否将手性和边缘流动力学传递给普通被动物质——从而作为一种通用机制，为未驱动的材料组分赋予手性功能——仍然是一个悬而未决的问题。在此，我们通过实验和数值模拟证明，纯旋转的磁性旋转器可以将手性和边缘流动力学传递给被动胶体物质。在高被动粒子分数下，主动旋转器组装成旋转团簇，周围环绕着被动物质。值得注意的是，当改变组成和旋转器吸引力时，这种组织会发生内外翻转：被动胶体形成旋转团簇，周围环绕着手性旋转器流体。这些被动转子表现出边缘流，并具有与其主动对应物相同的角速度标度关系，$|\Omega|\sim R^{-2}$。一个最小模型表明，旋转器介导的横向和非互易相互作用足以重现这些互补的手性状态及其边界驱动的动力学。我们的结果确立了主动旋转器的角动量注入作为一种途径，可为原本被动的物质赋予手性、集体旋转和边界输运特性。
英文摘要
Active spinners inject angular momentum into their surroundings without persistent translation, providing a route to chiral active matter distinct from self-propelled particles moving along curved trajectories. Recent studies have shown that spinner fluids can self-organize into rotating clusters with circulating edge currents characteristic of odd-viscous fluids. Whether angular-momentum injection alone can transmit chirality and edge-current dynamics to ordinary passive matter - and thus serve as a generic mechanism for imparting chiral functionality to undriven material components - remains an open question. Here, we show experimentally and numerically that purely rotational magnetic spinners can transfer chirality and edge-current dynamics to passive colloidal matter. At high passive-particle fraction, active spinners assemble into rotating clusters surrounded by passive matter. Remarkably, upon changing composition and spinner attraction, this organization turns inside out: passive colloids form rotating clusters surrounded by a chiral spinner fluid. These passive rotors exhibit edge currents and the same angular-velocity scaling, $|Ω|\sim R^{-2}$, as their active counterparts. A minimal model shows that spinner-mediated transverse and non-reciprocal interactions are sufficient to reproduce these complementary chiral states and their boundary-driven dynamics. Our results establish angular-momentum injection by active spinners as a route to endow otherwise passive matter with chirality, collective rotation and boundary transport.
Comments18 pages, 5 figures
