溶剂散逸自组装制备导电各向异性的金属有序阵列

通过溶剂散逸自组装法制备了聚苯乙烯(PS)有序多孔膜. 利用水珠在冷的PS溶液表面凝结形成有序阵列, 使PS以水珠阵列为模板形成有序多孔膜. 将有序多孔膜的上层剥离并附着在可收缩性高分子表面, 并进行离子溅射, 除掉有序多孔膜后在可收缩膜上留下了有序的金属圆盘阵列. 经过收缩, 有序阵列不仅光学性质发生了改变, 而且实现了导电的各向异性.

Preparation of Anisotropic Conductive Metal Regular Arrays by Solvent Evaporation Self-assembly

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.