Table 1. The water contact angle (WCA) on graphene nanosheets before and after plasma treatment.
| Plasma treatment time (s) | 0 | 1 | 2 | 3 | 6 | 9 | 12 |
|---|---|---|---|---|---|---|---|
| WCA (°) | 89.5 | 74.7 | 70.4 | 63.4 | 58.4 | 52.9 | 45.4 |
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