Stems | Average diameter (µm) (used for contact angle measurement) | |
Group-1 E1 + E3 + E4 + E6 | Group-2 E2 | |
Narrow | 0.09 ± 0.02 | 0.09 ± 0.03 |
Medium | 0.08 ± 0.03 | 0.10 ± 0.03 |
Wide | 0.09 ± 0.02 | 0.08 ± 0.02 |