scattering methods, intense synchrotron radiation is necessary. Such experiments are very
challenging as liquid surfaces can not be tilted and the synchrotron beam has to be directed
onto the sample. Therefore, special diffractometers such as the Liquid Interfaces Scattering
Apparatus (LISA) at the beamline P08 of PETRA III, which account for the special liquid
surface geometry, are necessary. Beside the intrinsic roughness, the roughness of the liquid …