祝贺车声平、张健华与牟方志等撰写的研究论文“Light-Programmable Assemblies of Isotropic Micromotors”被中国科协和美国科学促进会（AAAS）合作出版，定位为国际顶尖综合性开源期刊Research正式接收！非平衡活性组装体研究在人工智能、活性材料和集群机器人方面具有重要的科学意义和技术价值。然而，现有的非平衡活性组装体主要是由具有非对称化学组分和几何形状的微纳米马达构成，它们之间局部相互作用易受布朗转动影响，导致组装体的可操控性低。在本工作中，我们发现由于不受布朗转动影响的由受光面指向背光面的表面泳动流，各向同性光催化微米马达（TiO2@Pt MMs）表现出可光编程控制的局部相互作用。因此，可通过控制光照方向来控制各向同性马达间相互作用从吸引、排斥到取向模式的自由切换，进而使其可以组装形成集群结构动态可调的非平衡活性组装体，包括非极性固态（静态胶体晶）、极性液态（趋光胶体流）、极性固态组装体（趋光胶体晶）。更有趣的是，我们还利用各向同性马达间相互作用在叠加光边界的可切换特性，设计出了灵巧的“光刀”，可以将不规则的胶体晶体“剪切”成特定的形状。该研究结果将促进活性物质和动态功能器件的发展。

原文摘要如下：“Life-like” non-equilibrium assemblies are of increasing significance, but suffering from limited steerability as they are generally based on micro/nanomotors with inherent asymmetry in chemical composition or geometry, of which the vigorous random Brownian rotations disturb the local interactions. Here we demonstrate that isotropic photocatalytic micromotors, due to the persistent phoretic flow from the illuminated to shadowed side irrespective of their Brownian rotations, experience light-programmable local interactions (reversibly from attraction to repulsion and/or alignment) depending on the direction of the incident lights. Thus, they can be organized into a variety of tunable non-equilibrium assemblies, such as apolar solids (i.e., immobile colloidal crystal), polar liquids (i.e., phototactic colloidal stream) and polar solids (i.e., phototactic colloidal crystal), which can further be “cut” into a pre-designed pattern by utilizing the switching motor-motor interactions at superimposed-light edges. This work facilitates the development of active matters and motile functional microdevices.