| 초록 |
Spatial confinement provides a powerful method to break the symmetry of an unconfined structure, showing an effective route to manipulate its self-assembled nanostructures. Polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) anisotropic particles with a variety of structural motifs were fabricated from oil-in-water emulsion. Novel patch-type nanostructures such as snowman-like, dumbbell-like, and raspberry-like particles were simply synthesized based on size and surfactant- selective assembly of BCPs. Free energy of assembled particle as a function of size and interfacial energy was calculated by strong segregation theory which reveals the underlying physics of nature of anisotropic particle self-assembly. Furthermore, control of P4VP hemisphere size and hybridization of particles were performed by addition of homopolymer and metal precursor to P4VP chains. This simple method to fabricate non-spherical colloidal particles will guide the design of other new structured materials. |
