Colloidal crystal microarrays and two-dimensional superstructures: a versatile approach for patterned surface assembly.
Colloidal crystal microarrays and two-dimensional superstructures: a versatile approach for patterned surface assembly.
复制标题
胶体晶体微阵列和二维超结构：图案化表面组装的通用方法。
作者：
R. Schaak;Robert E. Cable;Brian M. Leonard;B. C. Norris
开发了一种简单、快速且稳健的在图案表面上进行胶体组装的方法。该方法涉及球形胶体悬浮液在光刻模板表面上的快速沉降和去湿。使用这种方法，我们可以快速、轻松地制造尺寸范围从 500 nm 到 4.5 μm 的二氧化硅和聚苯乙烯球的密堆积胶体晶体微阵列。微阵列倾向于诱导单层胶体晶体的形成，单层胶体晶体可以相互连接并作为独立的胶体晶体板从模板上移除。同样的方法也可用于组装可采用多种结构的二维胶体晶体超晶格。石墨、戈薇、体心立方、开六方、四方、线性链结构都可以通过调整球体直径与模板直径的比例来快速获得。
A simple, fast, and robust approach to colloidal assembly on patterned surfaces was developed. The approach involves the rapid settling and dewetting of suspensions of spherical colloids on lithographically templated surfaces. Using this method, we can quickly and easily fabricate close-packed colloidal crystal microarrays of both silica and polystyrene spheres that range in size from 500 nm to 4.5 microm. The microarrays tend to induce the formation of monolayer colloidal crystals, which can be interconnected and removed from the templates as free-standing colloidal crystal slabs. The same approach can also be used to assemble two-dimensional colloidal crystal superlattices that can adopt a variety of structures. Graphite, kagome, body-centered cubic, open hexagonal, tetragonal, and linear chain structures can all be quickly accessed by adjusting the ratio of the sphere diameter to the template diameter.