FIGURE 2.
(a–c) White light interferometry analysis of thermoplastic polyurethane (TPU) plates after melt‐pressing different degrees of surface roughness, showing an: (a) Ra of 0.12 μm after melt‐pressing with an Ra 0.14 μm; (b) Ra of 8.4 μm after melt‐pressing with an Ra 6.3 μm; (c) Ra of 22.72 μm after melt‐pressing with an Ra 18.0 μm. (d,e) Scanning electron microscopy of TPU discs with an Ra of 8.4 μm at a magnification of 200x after the TPU was: (d) double dip‐coated with BCP particles in tetrahydrofuran; or (e) eight times dip‐coated with BCP particles in tetrahydrofuran