Table A1.
Bands | Raman Shift/cm−1 | Structure Characteristic for a Vibration Mode |
---|---|---|
G | ≈1580 | ideal graphitic lattice |
D1 (D) | ≈1350 | disordered graphitic lattice—graphene layer edges |
D2 | ≈1620 | disordered graphitic lattice—surface graphene layers |
D3 | ≈1500 | amorphous carbon |
D4 | ≈1200 | disordered graphitic lattice polyenes, ionic impurities |