标题： 可调的胶体轨迹在近波浪壁的向列相液晶中 显示英文标题

标题： Tunable colloid trajectories in nematic liquid crystals near wavy walls

摘要： 能够控制胶体运动是在材料科学到生命系统等多个领域中一个重要挑战。 在这里，通过在受限的向列相液晶中嵌入能量景观，我们设计了一个通用平台来定义胶体迁移。 这是通过在向列相液晶中放置一个波浪形墙壁，具有交替的山丘和凹陷，以施加具有交替扩张和弯曲畸变的平滑弹性能场来实现的。 这个区域生成（亚）稳定的位置，这些位置作为吸引子，而不稳定的位置则在相对于胶体半径较大的距离上排斥胶体。 利用这些位置附近的能量梯度来控制胶体轨迹。 我们通过研究缺陷配置之间的转换、沿着明确路径推动粒子以及利用多稳态系统将粒子发送到区域内的特定位置，展示了这种控制的几个方面。 这种定制的景观在可重构系统和微机器人应用中具有前景。 显示英文摘要

摘要： The ability to dictate colloid motion is an important challenge in fields ranging from materials science to living systems. Here, by embedding energy landscapes in confined nematic liquid crystals, we design a versatile platform to define colloidal migration. This is achieved by placing a wavy wall, with alternating hills and wells, in nematic liquid crystals, to impose a smooth elastic energy field with alternating splay and bend distortions. This domain generates (meta) stable loci that act as attractors and unstable loci that repel colloids over distances large compared to the colloid radius. Energy gradients in the vicinity of these loci are exploited to dictate colloid trajectories. We demonstrate several aspects of this control, by studying transitions between defect configurations, propelling particles along well defined paths and exploiting multistable systems to send particles to particular sites within the domain. Such tailored landscapes have promise in reconfigurable systems and in microrobotics applications