Table 1.
Synthetic methods and the number of layers in graphenes.
| Synthetic method | No. of layers |
|---|---|
| Micromechanical cleavage from graphite | 1 |
| Solution phase exfoliation of graphite | 1 |
| Epitaxial growth | 1 |
| Chemical vapor deposition (CVD) | 1 |
| Solvothermal synthesis | 1 |
| Reduction of single-layer | 1 |
| graphene oxide (RGO) | |
| Arc evaporation of graphite in H2 (HG)a | 2–3 |
| Thermal exfoliation of graphite oxide (EG) | 2–7 |
| Chemical reduction of exfoliated | 2–6 |
| graphene oxide (EG-H) | |
| Conversion of nanodiamond (DG) | 4–8 |
aNitrogen-doped and boron-doped HG samples (N-HG and B-HG) have been prepared by introducing N- and B-containing molecules in the arc discharge.