Light-controlled assembly of active colloidal molecules
Light-controlled assembly of active colloidal molecules
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DOI：
10.1063/1.5079861
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发表时间：
2019-03-07
影响因子：
4.4
通讯作者：
Volpe, Giovanni
中科院分区：
文献类型：
--
作者：
Schmidt, Falko;Liebchen, Benno;Volpe, Giovanni
由于恒定的能量输入，活性物质可以自组装成具有复杂结构和功能的相，例如动态形成，重塑和分解的活性簇，这在平衡材料中是被熵最大化（或自由能最小化）原理所禁止的。控制这种主动自组装的挑战引起了广泛的努力，通常取决于单个能动成分的特性的工程。在这里，我们提供了一种不同的途径，只有当单个构建块以我们通过激光控制的方式结合在一起时，活动才会作为一种新兴现象发生。使用实验和模拟两种不动的微球，我们通过创建具有复杂行为阵列的活性分子，成为迁移者，旋转者和旋转者，来实现这一路线。通过光可控的非互易相互作用来控制主动自组装的动力学的可能性将激发理解生命物质和设计活性材料的新方法。由AIP Publishing授权出版。
Thanks to a constant energy input, active matter can self-assemble into phases with complex architectures and functionalities such as living clusters that dynamically form, reshape, and break-up, which are forbidden in equilibrium materials by the entropy maximization (or free energy minimization) principle. The challenge to control this active self-assembly has evoked widespread efforts typically hinging on engineering of the properties of individual motile constituents. Here, we provide a different route, where activity occurs as an emergent phenomenon only when individual building blocks bind together in a way that we control by laser light. Using experiments and simulations of two species of immotile microspheres, we exemplify this route by creating active molecules featuring a complex array of behaviors, becoming migrators, spinners, and rotators. The possibility to control the dynamics of active self-assembly via light-controllable nonreciprocal interactions will inspire new approaches to understand living matter and to design active materials. Published under license by AIP Publishing.