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Comparison of coal-based carbon nanomaterials*
| C1 | C2 | C3 | |
|---|---|---|---|
| Lateral size (nm) | 2–4 | 70–500 | 70–500 |
| Carbon layers | 1 | 3–5 | 3–7 |
| Aspect ratio | 2–4 | 50–100 | 50–100 |
| C/O ratio | 1.92 | 30.2 | 18.8 |
*The lateral size and carbon layers in Table 3 are based on statistical TEM analysis (see SI for TEM images and details). The C/O ratio is based on XPS analysis.
