论文标题
通过活动的时间调节，指导主动胶体的自组装
Guiding self-assembly of active colloids by temporal modulation of activity
论文作者
论文摘要
自构成颗粒集合中的自组织现象开放途径，可以通过传统平衡过程无法访问新的动态状态。挑战是制定一组原则，以促进对新兴活跃状态的控制和操纵。在这里，我们报告说，通过脉动电场自我组织为交替的平方晶格，介电滚动胶体，并具有由该场参数控制的晶格常数。我们结合了实验和模拟，以检查新兴集体模式的时空特性，并研究自组织的潜在动力学。我们揭示了动态晶格对压缩/膨胀应力的抗性，从而导致晶格常数的肌电行为。通过活动的时间调制，可以将模式合成和控制模式合成的一般机制应用于其他活性胶体系统。
Self-organization phenomena in ensembles of self-propelled particles open pathways to the synthesis of new dynamic states not accessible by traditional equilibrium processes. The challenge is to develop a set of principles that facilitate the control and manipulation of emergent active states. Here, we report that dielectric rolling colloids energized by a pulsating electric field self-organize into alternating square lattices with a lattice constant controlled by the parameters of the field. We combine experiments and simulations to examine spatiotemporal properties of the emergent collective patterns, and investigate the underlying dynamics of the self-organization.We reveal the resistance of the dynamic lattices to compression/expansion stresses leading to a hysteretic behavior of the lattice constant. The general mechanism of pattern synthesis and control in active ensembles via temporal modulation of activity can be applied to other active colloidal systems.
