Table 1 The band gap of zigzag and armchair graphenes in various widths
Graphene size | Band gap (eV) | Graphene size | Band gap (eV) | ||
---|---|---|---|---|---|
Zigzag | Armchair | Zigzag | Armchair | ||
1 × 7 | 0.696 | 0.540 | – | – | – |
2 × 7 | 0.351 | 0.311 | 2 × 2 | 0.345 | 0.334 |
3 × 7 | 0.145 | 0.123 | 3 × 3 | 0.129 | 0.007 |
4 × 7 | 0.054 | – | 4 × 4 | 0.009 | 0.003 |
5 × 7 | 0.024 | – | 5 × 5 | 0.009 | – |
6 × 7 | 0.004 | – | 6 × 6 | – | – |
7 × 7 | – | – | 7 × 7 | – | – |