Department of Mechanical Engineering, University of Louisville, Louisville, KY 40292, USA.
J Colloid Interface Sci. 2013 Mar 15;394:598-603. doi: 10.1016/j.jcis.2012.11.066. Epub 2012 Dec 19.
Reliable and simple techniques for rapid assembly and patterning of colloid architectures advance the discovery and implementation of such nanomaterials. This work demonstrates rapid electrokinetic two-dimensional assembly of colloidal structures guided by the geometry of thin film heaters within a parallel-plate device. This system is designed to enable either independently addressable or massively parallel colloidal assembly. A combination of electrothermal hydrodynamics, particle-electrode, and particle-particle electrokinetic interactions governs their assembly. Concentration and patterning of structures are shown with 1.0 μm polystyrene particles and sorting between 1.0 μm and 2.0 μm particles is demonstrated.
可靠且简单的胶体结构快速组装和图案化技术推动了此类纳米材料的发现和应用。本工作展示了在平行板器件中通过薄膜加热器的几何形状引导胶体结构的快速电动二维组装。该系统旨在实现独立寻址或大规模并行胶体组装。胶体的组装由电热流体动力学、颗粒-电极和颗粒-颗粒电动动力学相互作用共同控制。使用 1.0μm 的聚苯乙烯颗粒展示了结构的浓度和图案化，并演示了 1.0μm 和 2.0μm 颗粒之间的分选。
