Brewster Angle Microscopy (BAM) images showed that above the LCST (HT), PSiFe films at pure water displayed no distinct features and only small aggregates, which disappeared after decompression. Below the LCST (LT), the films were more visible, forming bright layers and eventually aggregates that were visible as fractal, dendrimer-like networks that gradually disaggregated during decompression. After adding KCl to the subphase, films became more visible under the same microscope settings (Figure ). At HT, bigger aggregates were visible with large "ice-floe"-like parts of the films, which were present even at low surface pressures. Upon decompression, films broke into small irregular pieces. At LT and 0.01 M KCl, at least two types of structures coexisted.