Fig. 4From: Unravelling protein corona formation on pristine and leached microplasticsSurface morphology of pristine (A, C and E) and BSA coronated (B, D and F) polyamide (PA) fibres. Inserts show the cross-section height of the surface, measured perpendicular to the elongated ridges. Atomic force microscopy scan areas were 5 μm. Colour bars indicate surface heightBack to article page