The orientational profiles of the water molecules for pure water in slab geometry are displayed in Fig. . Eq. ( ). The black line corresponds to the FG reference system (s max = 1). The green line shows the system with s max = 1.5. Blue lines represent systems with s max = 2 and three different cutoff values (R c = 2.0, 2.4 or 2.8 nm). The shaded blue vertical strips mark the SG regions surrounding the FG region.