A scanning microbeam GISAXS investigation of a gold gradient on a PS film. Two-dimensional GISAXS patterns were recorded at different positions along the gradient, as illustrated for selected positions. The arrows indicate the positions of the eight patterns. The scattering pattern undergoes characteristic changes. The specular reflected beam (qz = 0.22 Å−1) is shadowed by the rectangular beam stop. Adapted with permission from Roth et al. (2004). Copyright (2004) Elsevier.