标题： 可重新编程的磁性晶格自组装 显示英文标题

标题： Re-programmable self-assembly of magnetic lattices

摘要： 简单的局部相互作用可以使基本构件自组装成复杂且具有功能的图案。 然而，即使对于少量的构件，也存在大量可能的配置，这些配置是合理的、稳定的，并且具有不同程度的有序性。 能够在多稳态图案之间动态切换（即重新编程自组装）需要在难以处理的搜索空间中进行导航，这仍然是一个挑战。 在本文中，我们设计宏观磁性粒子的自组装，以创建具有动态可逆涌现相的超材料。 我们利用由磁性铰链组成的边界，将自由漂浮的磁性圆盘限制在不同的稳定组装中。 我们利用磁性边界的无损特性，创建可重新编程的二维超材料，使用相同数量的圆盘和边界，使其从晶体结构转变为准晶体结构，再转变为无序组装。 此外，我们探索了它们在有效无阻尼介质中控制声波传播的实用性，该介质具有丰富的非线性特性。 我们的研究结果可以扩展超材料的范围，使其进入功能性和可调器件领域。 显示英文摘要

摘要： Simple local interactions can cause primitive building blocks to self-assemble into complex and functional patterns. However, even for a small number of blocks, there exist a vast number of possible configurations that are plausible, stable, and with varying degree of order. The ability to dynamically shift between multi-stable patterns (i.e., reprogram the self-assembly) entails navigating an intractable search space, which remains a challenge. In this paper, we engineer the self-assembly of macroscopic magnetic particles to create metamaterials with dynamically reversible emergent phases. We utilize a boundary composed of magnetic hinges to confine free-floating magnetic disks into different stable assemblies. We exploit the non-destructive nature of the magnetic boundaries to create re-programmable two-dimensional metamaterials that morphs from crystalline to quasi-crystalline to disordered assembly using the same number of disks and boundary. Furthermore, we explore their utility to control the propagation of sound waves in an effectively undamped media with rich nonlinearities. Our findings can expand the metamaterials horizon into functional and tunable devices.