Surface organic composition of modified device-suitable alloys detected by XPS (mean±SD)
| PDA | PDA+DBCO | PDA+DBCO+ligand | |
| C | 72.3±0.3 | 70.0±0.7 | 71.0±0.4 |
| O | 20.9±0.3 | 22.6±0.6 | 20.5±0.4 |
| N | 6.9±0.2 | 7.3±0.6 | 8.3±0.8 |
| S | NA | NA | 0.3±0.1 |
| O/C | 0.29 | 0.32 | 0.29 |
| N/C | 0.10 | 0.10 | 0.12 |
C, Carbon; DBCO, dibenzocyclooctyne; N, Nitrogen; NA, not applicable; O, Oxygen; PDA, polydopamine; S, Sulfur; XPS, X-ray photoelectron spectroscopy.