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Poly(tetrafluoroethylene) (PTFE) chemical composition as resulted from XPS measurements for each surface variant.
| PTFE_Control | PTFE_50 | PTFE_50_N200 | PTFE_50_N400 | PTFE_50_O200 | PTFE_50_O400 | |
|---|---|---|---|---|---|---|
| Elements (%) | ||||||
| C | 32.2 | 30.4 | 29.9 | 28.8 | 29.8 | 31.4 |
| F | 66.8 | 67.7 | 68.1 | 69.2 | 66.6 | 67.2 |
| O | 1.0 | 1.9 | 2.0 | 2.0 | 3.6 | 1.4 |
| N | - | - | - | - | - | - |
| C bonds (%) | ||||||
| -CF2- | 95.0 | 79.5 | 68.8 | 49.4 | 71.5 | 77.1 |
| -CF | - | 11.2 | 9.4 | 32.2 | 9.7 | 12.2 |
| -C-OH- | - | 4.2 | 11.2 | 6.9 | 7.3 | - |
| -C-C- | 5.0 | 5.1 | 10.6 | 11.5 | 11.5 | 10.7 |
