Figure 3

The SEM images showed (a, b) clean surface of N-PTFE(inset: CA of 96.2°), and (d, e) corrugated surface of Sh-PTFE, (inset: CA of 135.2°). The AFM images revealed (c) clear surface morphology on N-PTFE film (the height of the layer ~ 45 nm) (f) and corrugate morphology on Sh-PTFE film (the height of the layer ~ 113 nm).