Enhancement of Polymer Cytocompatibility by Nanostructuring of Polymer Surface

Figure 1

AFM images of PET samples irradiated with 157 nm laser (4.40 mJ/cm²) under different angles of laser beam incidence; (a) angle of incidence 0° (perpendicular to the sample surface), (b) 22.5°, and (c) 45°. 𝑅_𝑎 is average surface roughness in nm [6].

(a)

(b)

(c)