| 초록 |
We present the highly ordered array of vanadium oxide (VO2) nanodots using nanoporous templates fabricated by block copolymers-based lithography. Thin layers of poly(vinyl alcohol) (PVA) and polystyrene-block-poly(2-vinyl pyridine) (S2VP) were subsequently prepared on a silicon substrate by spin-coating method. Then, the S2VP thin film on the PVA layer was solvent-annealed in toluene vapor for its self-assembly, so that hexagonally packed P2VP cylinders oriented vertically to the surface were achieved. After surface reconstruction of the S2VP thin film in ethanol, the resulting film showed hexagonally packed nanoporous structures. Then, VO2 nanocrystals were deposited on the nanoporous templates. The samples were thermally treated to induce VO2 nanodots array while organic components were completely degraded during the thermal process in both methods. |
