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Surface atomic composition (%) calculated from high-resolution XPS spectra of different monolayers. ((−) not detected).
| Samples | C1s | N1s | O1s | Au4f | Ratio | |
|---|---|---|---|---|---|---|
| C/Au | N/Au | |||||
| EG4 | 65.9 | — | 20.6 | 13.5 | 4.9 | — |
| CDI (3) | 64.9 | — | 21.9 | 13.2 | 4.9 | — |
| CDI (30) | 64.4 | — | 22.2 | 13.4 | 4.8 | — |
| Chain201D (3) | 67.2 | 1.6 | 19.6 | 11.6 | 5.8 | 0.14 |
| Chain201D (30) | 68.0 | 4.5 | 18.1 | 9.4 | 7.2 | 0.48 |
| CEM7 (3) | 67.0 | 1.7 | 20.3 | 11.0 | 6.1 | 0.15 |
| CEM7 (30) | 67.0 | 2.2 | 20.0 | 10.8 | 6.2 | 0.2 |
