| 초록 |
In this presentation, we describe a new design concept to synthesize amphiphilic block copolymers to rationally control the topology of the self-assembled structure. Our design involves a hydrophilic block constructed on a dendritic scaffold for which the number of the peripheral hydrophilic chains can be precisely controlled while the overall molecular weight of the hydrophilic segment is unchanged by matching the molecular weight of individual peripheral chains. This enables us to induce a change in the molecular packing geometry at the interface of the hydrophobic core of the micelle without significantly altering the weight ratio between two blocks. As a result, we specifically induce a topological change in cylindrical micelles from linear cylinders to either toroidal or lasso (a ring attached to a linear cylinder) micelles, which is caused by differences in the steric effect on the corona of the micelles. |
