粘性旋转体单层凝胶化中的瞬态手性
Transient Chirality in the Gelation of Adhesive Spinner Monolayers
AI总结：
本研究通过大规模流体动力学模拟发现，粘性旋转体单层在凝胶化早期表现出瞬态结构手性，但在动力学冻结后手性消散并形成常规凝胶结构，尽管无奇机械响应，其弹性模量和凝胶化时间仍可通过旋转活性调节，为可编程软材料设计提供了新途径。
摘要：
自转元素的活性系统固有地表现出手性，因宇称破缺而具有基础研究价值。我们利用大规模流体动力学模拟，研究了低雷诺数下限制在准二维单层中的粘性旋转体的凝胶化。与被动胶体的粗化动力学不同，旋转体凝胶化遵循不同路径，在聚集早期阶段表现出结构手性。然而，这种手性在动力学冻结时消散，导致最终凝胶结构类似于常规胶体凝胶。因此，我们发现没有奇机械响应的迹象。尽管如此，弹性模量和凝胶化时间仍可通过旋转活性进行调节，为可编程软材料的自下而上设计提供了新途径。
英文摘要：
Active systems of self-rotating elements inherently exhibit chirality, making them of fundamental interest due to parity violation. Using large-scale hydrodynamic simulations, we investigate the gelation of adhesive spinners confined to quasi-2D monolayers at low Reynolds numbers. Unlike the coarsening dynamics of passive colloids, spinner gelation follows a different pathway, displaying structural chirality during the early stages of aggregation. However, this chirality dissipates upon dynamical arrest, resulting in a final gel structure that resembles a conventional colloidal gel. As a result, we find no sign of odd mechanical responses. Nonetheless, the elastic modulus and gelation time remain tunable through spinning activity, providing a new avenue for the bottom-up design of programmable soft materials.
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