Formation of colloidal chains and driven clusters with optical binding
Formation of colloidal chains and driven clusters with optical binding
复制标题
通过光学结合形成胶体链和驱动簇
DOI：
10.1039/d2sm00393g
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发表时间：
2022
期刊：
影响因子：
3.4
通讯作者：
Kleckner, Dustin
中科院分区：
文献类型：
--
作者：
Davenport, Dominique J.;Kleckner, Dustin
我们研究了光学结合力对在反向传播光束中自由移动的波长大小的胶体颗粒的影响。这项工作的动机是利用光学结合来引导大量胶体颗粒的组装；以前的工作使用了少量粒子和/或一维或二维受限几何形状。利用一种新颖的实验方案，我们描述了 20-100 个粒子在 3 维空间中自由移动的一般静态和动态自组织行为。我们观察到胶体自组织成大型光学束缚结构以及驱动粒子簇的形成。此外，我们还表明，可以使用颗粒的折射率和结合光的特性来调整这些光学结合系统的结构和行为。特别是，我们表明驱动行为源自 N 体相互作用，这对未来关于 2 个以上粒子的光学束缚簇的研究具有重要意义。
We study the effects of the optical binding force on wavelength sized colloidal particles free to move in a counter-propagating beam. This work is motivated by the concept of using optical binding to direct the assembly of large numbers of colloidal particles; previous work has used small numbers of particles and/or 1D or 2D restricted geometries. Utilizing a novel experimental scheme, we describe the general static and dynamic self-organization behaviors for 20–100 particles free to move in 3-dimensional space. We observe the self-organization of the colloids into large optically bound structures along with the formation of driven particle clusters. Furthermore we show that the structure and behavior of these optically bound systems can be tuned using the refractive index of the particles and properties of the binding light. In particular, we show that the driven behavior originates from N-body interactions, which has significant implications for future work on optically bound clusters of more than 2 particles.