Fig. 9

2D and 3D-AFM images of samples of polymer 3. a, b) Surface of sample with a thickness of d=330 nm and c, d) d=623 nm. Both samples were irradiated with EPL (ε=15^∘) for 70 min (right). The surfaces are clearly different and PSSP after irradiation is very weakly pronounced. As already mentioned, some small and big bubbles are visible on the surface in b) and d)