The creation of shaped, uniform and colloidally stable two-dimensional (2D) assemblies by bottom-up methods represents a challenge of widespread current interest for a variety of applications. Herein, we describe the utilization of surface charge to stabilize self-assembled planar structures that are formed from crystallizable polymer precursors by a seeded growth approach. Addition of crystallizable homopolymers with charged end-groups to seeds generated by the sonication of block copolymer micelles with crystalline cores yields uniform platelet micelles with controlled dimensions. Significantly, the seeded growth approach is characterized by a morphological memory effect whereby the origin of the seed, which can involve a quasi-hexagonal or rectangular 2D platelet precursor, dictates the observed 2D platelet shape. This new strategy is illustrated using two different polymer systems, and opens the door to the construction of 2D hierarchical structures with broad utility.

通过自下而上的方法创建成形，均匀且胶体稳定的二维（2D）组件，代表了当前对各种应用广泛关注的挑战。在这里，我们描述了利用表面电荷稳定通过晶种生长方法由可结晶聚合物前体形成的自组装平面结构的方法。将具有带电荷端基的可结晶均聚物添加到通过对具有结晶核的嵌段共聚物胶束进行超声处理而产生的种子中，得到尺寸可控的均匀的血小板胶束。重要的是，种子生长方法的特征在于形态记忆效应，由此种子的起源（可能涉及准六边形或矩形2D血小板前体）决定了观察到的2D血小板形状。