Semi-conducting two-dimensional (2D) nanoobjects, prepared by self-assembly of conjugated polymers, are promising materials for optoelectronic applications. However, no examples of self-assembled semi-conducting 2D nanosheets whose lengths and aspect ratios are controlled at the same time have been reported. Herein, we successfully prepared uniform semi-conducting 2D sheets using a conjugated poly(cyclopentenylene vinylene) homopolymer and its block copolymer by blending and heating. Using these as 2D seeds, living crystallization-driven self-assembly (CDSA) was achieved by adding the homopolymer as a unimer. Interestingly, unlike typical 2D CDSA examples showing radial growth, this homopolymer assembled only in one direction. Owing to this uniaxial growth, the lengths of the 2D nanosheets could be precisely tuned from 1.5 to 8.8 μm with narrow dispersity according to the unimer-to-seed ratio. We also studied the growth kinetics of the living 2D CDSA and confirmed first-order kinetics. Subsequently, we prepared several 2D block comicelles (BCMs), including penta-BCMs in a one-shot method.

通过共轭聚合物的自组装制备的半导体二维（2D）纳米物体是用于光电应用的有前途的材料。然而，没有报道其长度和纵横比被同时控制的自组装半导体2D纳米片的实例。在这里，我们通过共混和加热共轭聚（环戊烯亚乙烯基）均聚物及其嵌段共聚物成功地制备了均匀的半导体二维片材。将它们用作2D种子，通过将均聚物作为单体添加来实现活性结晶驱动自组装（CDSA）。有趣的是，与显示径向增长的典型2D CDSA示例不同，该均聚物仅在一个方向上组装。由于这种单轴生长，可以将2D纳米片的长度精确地从1.5调整为8。根据单体比，分散度为8μm。我们还研究了2D CDSA的生长动力学并确定了一级动力学。随后，我们以单次方式准备了几个2D块漫画（BCM），包括五角形BCM。