| 초록 |
We have achieved long-range ordering of block copolymers (BCPs) by using solvent-annealing process and topographically patterned substrates. To obtain sub-100 nm nano-structures, poly(tetrafluoro ethylene) (PTFE) bar were initially rubbed on various substrates maintaining angle and velocity. Because of its low friction coefficient and high wear rate, highly aligned nano-stripes PTFE were fabricated on the surface along to rubbing direction as linear and curved shapes. Then, polystyrene-block-poly(2-vinylpyridine) copolymers (PS-b-P2VP) (S2VP) with different molecular weights were spin-coated on the template and solvent annealed by organic vapor to induce BCP nanostructure. As a result, vertically and horizontally orientation of BCPs was dramatically enhanced due to the guiding effect provided by underlying PTFE patterns in large area. In addition, the BCP thin films were utilized as templates to synthesize inorganic nano-dot arrays to apply further applications. |
