| 초록 |
Recent studies revealed that block copolymer (BCP) microdomains are capable of being organized into unusual lattices such as Frank-Casper phases. These unique structures result from a compromise between domain geometry and space-filling constraint; in other words, the deformability of soft matter. Herein, we demonstrate the evaporation-induced self-assembly (EISA) of BCP blends as a powerful method to access such unconventional symmetry. BCPs with insoluble blocks of larger molecular weight were assembled into charged spherical micelles with large “core” and short “corona” in a selective solvent, thereby intensifying the space-filling constraint. The micellar structures and interactions can be controlled with charge density and solvent quality, so that the micelles further assemble into calcite-like trigonal crystalline arrays. Equipped with TEM-tomography and spectroscopic analysis, we describe the structure and detailed assembly mechanism of our charged micellar crystals. |
