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| Scratch number, Fig. 3a | Force, μN | Width at middle, nm | Depth, nm |
|---|---|---|---|
| 1 | 2 | 300 ± 100 | 1.5 ± 0.5 |
| 2 | 5 | 400 ± 100 | 8.5 ± 0.5 |
| 3 | 8 | 400 ± 100 | 8.5 ± 0.5 |
| 4 | 12 | 500 ± 100 | 8.5 ± 0.5 |
| 5 | 15 | 500 ± 100 | 8.5 ± 0.5 |
| 6 | 20 | 500 ± 100 | 30.0 ± 2.0 |
