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Surface composition of the different samples, as detected by XPS analysis.
| sample | Ti2p3 (%) | O1s (%) | C1s (%) | N1s (%) | Na1s (%) | Si2p (%) |
|---|---|---|---|---|---|---|
| TC etched | 31.33 | 63.00 | 4.65 | 1.02 | ||
| TC-A etched | 24.06 | 63.60 | 4.94 | 0.58 | 6.82 | |
| TC-AA etched | 11.98 | 45.66 | 23.87 | 5.46 | 1.53 | 11.50 |
| TC-A(C/H)6 etched | 3.29 | 16.37 | 67.88 | 11.90 | 0.56 | |
| TC-AA(C/H)6 etched | 1.31 | 13.76 | 72.12 | 12.00 | 0.11 | 0.70 |
