Ensembles of actuated colloids are excellent model systems to explore emergent out-of-equilibrium structures, complex collective dynamics, and design rules for the next generation materials. Here, we demonstrate that ferromagnetic microparticles suspended at an air-water interface and energized by an external rotating magnetic field spontaneously form dynamic ensembles of synchronized spinners in a certain range of the excitation field parameters. Each spinner generates strong hydrodynamic flows, and collective interactions of the multiple spinners promote a formation of dynamic lattices. On the basis of experiments and simulations, we reveal structural transitions from liquid to nearly crystalline states in this novel active spinner material and demonstrate that dynamic spinner lattices are reconfigurable, capable of self-healing behavior and that the transport of embedded inert cargo particles can be remotely tuned by the parameters of the external excitation field. Our findings provide insights into the behavior of active spinner materials with reconfigurable structural order and tunable functionalities.

致动胶体的集合体是出色的模型系统，可探索新兴的失衡结构，复杂的集体动力学以及下一代材料的设计规则。在这里，我们证明了悬浮在空气-水界面处并由外部旋转磁场激发的铁磁微粒会在一定范围内的激发场参数中自发形成同步旋转器的动态合奏。每个旋转器产生强大的流体动力流，并且多个旋转器的集体相互作用促进了动态晶格的形成。在实验和模拟的基础上，我们揭示了这种新型活性微调材料中从液态到几乎结晶状态的结构转变，并证明了动态微调晶格是可重构的，具有自我修复行为的能力，并且可以通过外部激发场的参数来远程调整嵌入的惰性货物颗粒的传输。我们的发现为具有可重新配置的结构顺序和可调功能的主动旋转器材料的行为提供了见解。