Research Article
Cement Pastes and Mortars Containing Nitrogen-Doped and Oxygen-Functionalized Multiwalled Carbon Nanotubes
Figure 1
Ball-stick models showing the following. (a) Nitrogen-doped single-walled carbon nanotubes (SWCNT-Nx); here, nitrogen-substitutional and nitrogen-pyridine sites are substituted into the lattice of the carbon nanotubes. (b) Oxygen-functionalized single-walled carbon nanotubes (SWCNTs-Ox) exhibiting O-epoxy, carbonyl (C=O), and hydroxyl (–OH) groups attached on the surface of the carbon nanotube.
| (a) Nitrogen-doped single-walled carbon nanotube (SWCNT-N) |
| (b) Oxygen-functionalized single-walled carbon nanotube (SWCNT-Ox) |