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Surface chemical composition of the reference foils and foils treated by rosemary coating (at. %).
| Sample | C | N | O | Si |
|---|---|---|---|---|
| PE-UV/O3 | 80.3 | / | 19.4 | |
| PP-UV/O3 | 84.9 | / | 15.1 | |
| PE-ROS | 81.1 | 0.6 | 17.9 | 0.4 |
| PP-ROS | 75.4 | 0.3 | 22.7 | 1.6 |
| Difference (%) PE |
0.8 | 0.6 | −1.5 | 0.4 |
| PP | −9.5 | 0.3 | 7.6 | 1.6 |
