Coupled oscillation and spinning of photothermal particles in Marangoni optical traps
Coupled oscillation and spinning of photothermal particles in Marangoni optical traps
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DOI：
10.1073/pnas.2024581118
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发表时间：
2021-05-04
影响因子：
11.1
通讯作者：
Hayward, Ryan C.
中科院分区：
文献类型：
--
作者：
Kim, Hyunki;Sundaram, Subramanian;Hayward, Ryan C.
循环驱动对于驱动生命系统的运动和运输至关重要，从细菌鞭毛的振荡运动到陆地动物的有节奏的步态。这些过程通常依赖于振荡器的动态和响应网络——这是一种很难在合成活性物质中复制的调节控制系统。在这里，我们描述了一个光驱动活性粒子的多功能平台，其相互作用的几何形状可以根据需要重新配置，从而能够构建振荡器和旋转网络。我们采用光诱导马兰戈尼捕获限制在空气-水界面上的颗粒并进行图案化照明。多个粒子之间的热相互作用会产生复杂的耦合振荡和旋转运动，从而为具有集体行为的可重构多粒子网络的设计开辟了新的领域。
Cyclic actuation is critical for driving motion and transport in living systems, ranging from oscillatory motion of bacterial flagella to the rhythmic gait of terrestrial animals. These processes often rely on dynamic and responsive networks of oscillators?a regulatory control system that is challenging to replicate in synthetic active matter. Here, we describe a versatile platform of light-driven active particles with interaction geometries that can be reconfigured on demand, enabling the construction of oscillator and spinner networks. We employ optically induced Marangoni trapping of particles confined to an air?water interface and subjected to patterned illumination. Thermal interactions among multiple particles give rise to complex coupled oscillatory and rotational motions, thus opening frontiers in the design of reconfigurable, multiparticle networks exhibiting collective behavior.