| Samples | Nanostructure | Outer diameter (nm) | Inner diameter (nm) | Length (nm) | Density (mm−2) |
| I | CNFs with grapheme//substrate | 25 | 0 | 110/ | 472 |
| II | CNTs (poorly oriented) |
|
|
|
|
| III | CNFs with graphene^substrate | 20 | 0 | 140/ | 494 |
| IV | CNTs | 30 | 9 | 375/ | 400 |
| V | CNPs |
|
|
|
|
| VI | CNTs (highly oriented) | 25 | 5 | 400/ | 349 |
| VII | CNTs (small oriented) |
|
| <100 |
|
| VIII | CNTs (highly oriented) | 10 | 4 | 187/ | 1000 |
| IX | CNWs |
|
|
|
|