| 초록 |
We achieved highly ordered nanostructures using block copolymers in thin films by solvent-annealing on nano-stripes of polymers. Unique nano-stripes of poly(tetrafluoro ethylene) (PTFE) having ~ 20 nm of amplitude and ~ 200 nm of pitch were simply generated by rubbing a PTFE bar on various substrates such as Si wafer, glass, polymer because of its low friction coefficient and high wear rate. Then, polystyrene-block-poly(2-vinylpyridine) copolymers (PS-b-P2VP) were subsequently spin-coated on the surface and solvent annealed in tetrahydrofuran (THF) vapor that is good solvent for both PS and P2VP blocks. With annealing time, extremely ordered BCP nanostructures which were vertically oriented were revealed in large area due to surface roughness from underlying patterns. Furthermore, the BCP domains were utilized as templates to synthesize inorganic nano-posts for further applications. |
