Plasma treatment time (min) | n (for RF plasma) | n (for DC plasma) |
1 | 1.45 | 1.45 |
5 | 1.47 | 1.46 |
10 | 1.49 | 1.47 |
15 | 1.52 | 1.49 |
20 | 1.55 | 1.52 |