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.
