Abstract:

Polystyrene(PS) ordered porous membranes were prepared by solvent evaporation self-organization. Microporous honeycomb films were fabricated by applying moist air to a spread polymer solution in a Petri dish(diameter, 9 cm) at ambient temperature. The dish was filled with 5 mL chloroform solution containing 3 g/L of polystyrene and 0.3 g/L polydodecyl acrylic amide acrylic acid(PDA). Humidified air(relative humi-dity is 50%) was pumped from a 250 mL gas washing bottle filled with 200 mL of Milli-Q water and was blown to the deposited polymer solution at a flow rate of 4 L/min. The polymer solution start to evaporate and the surface turned turbid result from the condensation of water vapor of the humidified air. After solvent evaporation, a thin opaque film remained in the dish. SEM was employed to study the morphology of the regular arrays. The ordered porous membrane upper were separated and attached on the shrinkable films and sputtering. After preparation of honeycomb-patterned films with pincushion structure, catalyst layer of palladium(Pd) was formed by sputtering with ion-sputtering instrument. The orderly metal disk arrays were left after the PS pincushion structures were got rid of. Through contraction, the orderly arrays optical properties changed, and the electric anisotropy were realized.

Key words: Solvent evaporation self-assembly, Metal regular array, Conductive