Microphase-separated lamellar block copolymers can be oriented perpendicular to a substrate. The application of this attractive configuration as a template for nanostructure fabrication requires additionally long-range in-plane alignment of the lamella, for which no simple procedures are available. Here we present a convenient solution to this problem by exploiting the combination of supramolecular liquid-crystalline ordering of the block copolymer in combination with PTFE rubbing technology. The mesogenic ligands incorporated in one of the blocks interact with the substrate and control the self-assembly, rendering a vertical orientation of the microdomains. In addition the vertical lamellae orient parallel to the friction-deposited PTFE layer leading to long-range lateral ordering, providing unique new possibilities for block copolymer nanotechnology.
微相分离的片层嵌段共聚物可以垂直于基底定向。要将这种极具吸引力的构型用作纳米结构制造的模板,还需要对薄片进行长程平面内对准,而目前还没有简单的方法来实现这一点。在此,我们将嵌段共聚物的超分子液晶有序化与聚
四氟乙烯摩擦技术相结合,为这一问题提供了便捷的解决方案。其中一个嵌段中的介源
配体与基底相互作用,控制自组装,使微域垂直定向。此外,垂直薄片的方向与摩擦沉积的聚
四氟乙烯层平行,从而产生长程横向有序,为嵌段共聚物纳米技术提供了独特的新可能性。