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| 0° (up) | 60° | 120° | 180° (down) | 240° | 300° | |
|---|---|---|---|---|---|---|
| First layer | 1 | >4.5 | 3.7 | 3.5 | 3.9 | 3.3 |
| Second layer | 1 | 3.3 | 3.5 | 1.9 | 3.7 | 3.9 |
| Third layer | 1 | 3.5 | 4.1 | 1.6 | 3.9 | 4.0 |
The growth rate of graphene zigzag edge as determined from the experiment, plotted as a function of orientation with respect to the up-step direction.
