| 초록 |
Solvent annealing is a process to facilitate the formation of desired morphology that uses solvent vapor, mostly derived from a saturated solvent atmosphere, to partially solubilize, hence, plasticize the thin films and increase the chain mobility. During the de-swelling process, it is expected that the solvent evaporation begins at the surface and the solvent concentration gradient develops normal to the surface. As the solvent evaporates further, it is proposed that the ordered phase forms from the top layer and the ordering propagates from the top to the bottom of the film. In the solvent annealing process, the nature of the solvent influences the degree of the swelling of each block and accordingly the result on the block copolymer morphology. We have investigated the swelling and de-swelling behavior of homo-polymer and block copolymer films to deepen our understanding on solvent annealing process. |
