电响应聚合物薄膜的表面图案化

由于图案化的功能表面在制备微流体器件和生物芯片等方面具有巨大应用潜力而备受关注,表面图案化的方法很多，如微接触印刷、光刻蚀和电子束刻蚀等等,聚2-丙烯酰胺基-2-甲基丙基磺酸（PAMPS）是一种电响应聚合物，在电场的作用下其体积能发生大幅度的变化，我们曾经报道通过带偏压的原子力针尖对PAMPS薄膜的微观浸润性进行调控,本文采用预先结构化的电极对薄膜施加电场，实现了其表面性质的图案化控制，对制备新型聚合物微器件具有重要意义。

Surface Patterning on the Electro-sensitive Polymer Film

Surface patterning was aroused much interest because of its great importance in the applications to microfluidic devices, etc. In this paper, we report a novel method to realize surface patterning on an electro-sensitive polymerpoly(2-acrylamido-2-methylpropanesulfonic acid). Through imposing the external electrical field utilizing a copper mesh film used in SEM as electrode, the film exhibits different properties in the areas that contact or not contact with the metal part of the mesh, which resulting in a pattern being the same as the mesh. This effect can be well explained by the conformational change of the polymer chains in the electric field.