| 초록 |
Current organic-based technologies demand efficient methods for controlled organization of polymers or small molecules at the surface. Here a new approach utilizing the confinement effect of surface onto the ordering of rodlike chains is introduced. We studied the ordering of rodlike polymer chains in the self-assembled monolayers of rod-coil block copolymers of which the surface-attractive coil block is used as surface-anchors. Dip- or immersion-coating in dilute solutions to mica surfaces yielded monolayer-thick bundles of surface-bound, crystalline rods. Above a critical grafting density, the monolayer thick rod bundles form two-dimensionally interconnected networks. Upon annealing with vapor of rod-selective solvents, highly oriented rod bundles were obtained. The result is accounted for by the lyotropic liquid crystalline state of the tethered rods occurred on swelling with the solvent vapor. This offers a useful method aligning rodlike polymers at the surface. |
