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O/C-ratio and relative percentage of carbon-containing functional groups present on the sample’s surface for each condition.
| O/C | C-C/C-H (%) | C-O (%) | C = O (%) | O-C = O (%) | |
|---|---|---|---|---|---|
| S1 | 0.43 ± 0.03 | 63.2 ± 2.4 | 14.2 ± 3.2 | 10.0 ± 2.1 | 12.6 ± 1.2 |
| S2 | 0.41 ± 0.03 | 62.3 ± 4.9 | 17.2 ± 5.8 | 8.0 ± 1.5 | 12.5 ± 1.0 |
| S3 | 0.40 ± 0.02 | 65.9 ± 6.4 | 18.5 ± 7.8 | 6.4 ± 1.6 | 9.1 ± 1.2 |
| B | 0.26 ± 0.03 | 72.6 ± 3.1 | 14.0 ± 3.5 | 8.4 ± 0.9 | 5.0 ± 0.6 |
| F | 0.42 ± 0.02 | 62.0 ± 3.7 | 20.5 ± 5.4 | 8.0 ± 2.2 | 9.5 ± 0.8 |
