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Elemental composition at the surface of pristine and functionalized Ti substrates as determined by XPS.
| Substrate | C% | O% | Ti% | N% | Sr% |
|---|---|---|---|---|---|
| Ti | 42.6 ± 0.46 | 41.8 ± 0.57 | 15.6 ± 0.74 | — | — |
| Ti/DOPA | 63.7 ± 0.58 | 21.5 ± 0.49 | 8.7 ± 0.68 | 6.1 ± 0.56 | — |
| Ti/DOPA/SA | 66.5 ± 0.23 | 24.7 ± 0.28 | 2.0 ± 0.78 | 6.8 ± 0.50 | — |
| Ti/DOPA/SA/Sr1 | 66.0 ± 0.48 | 24.5 ± 0.72 | 2.1 ± 0.38 | 4.8 ± 0.39 | 2.6 ± 0.82 |
| Ti/DOPA/SA/Sr5 | 64.6 ± 0.39 | 23.6 ± 0.61 | 1.7 ± 0.45 | 4.6 ± 0.51 | 5.5 ± 0.76 |
