论文标题
活性液体界面的动力学
Dynamics of active liquid interfaces
论文作者
论文摘要
控制相位分离流体混合物的相位界面是创建各种功能软材料的关键。传统上，这是通过表面修饰化学剂来完成的。使用实验和理论，我们研究了机械活动如何塑造分离活性和被动流体的软接口。活性流体中的混沌流量会引起巨大的界面波动和非惯性传播活跃波。在高活动中，应力破坏界面连续性和驱动液滴的产生，产生由有限大小的液滴组成的乳液样活跃状态。当与固体边界接触时，主动界面表现出非平衡润湿过渡，其中流体沿重力爬上壁。这些结果证明了机械驱动的界面的希望，以创建新的软性活动物质。
Controlling interfaces of phase separating fluid mixtures is key to creating diverse functional soft materials. Traditionally, this is accomplished with surface-modifying chemical agents. Using experiment and theory, we study how mechanical activity shapes soft interfaces that separate an active and a passive fluid. Chaotic flows in the active fluid give rise to giant interfacial fluctuations and non-inertial propagating active waves. At high activities, stresses disrupt interface continuity and drive droplet generation, producing an emulsion-like active state comprised of finite-sized droplets. When in contact with a solid boundary, active interfaces exhibit non-equilibrium wetting transitions, wherein the fluid climbs the wall against gravity. These results demonstrate the promise of mechanically driven interfaces for creating a new class of soft active matter.
