| 초록 |
We describe a facile method for the fabrication of thermo-responsive wetting surfaces through the layer-by-layer (LBL) method. The nanostructured films were prepared through the LBL assembly of negatively charged silica nanoparticles and positively charged poly(allylamine hydrochloride). Using thermally responsive material, poly(N-isopropylacrylamide) (PNIPAAm), we attempted to control the thermo-responsive surface wettability of prepared substrates via two different methods. First, a PNIPAAm-based polyelectrolyte copolymer was synthesized and introduced onto nanoporous surfaces via electrostatic self-assembly. In a second approach, SI-ATRP was used to graft PNIPAAm to nanostructured films. Using this approach, we have fabricated a wetting surface that is thermo-switchable from superhydrophobicity to superhydrophilicity. acknowledgement: a grant (07K1501-01010) from the Center for Nanostructural Materials Technology under the 21st Century Frontier R&D Programs of MOST, Korea. |
