Cement Pastes and Mortars Containing Nitrogen-Doped and Oxygen-Functionalized Multiwalled Carbon Nanotubes

<div>(a) and (b) TEM images of nitrogen-doped multiwalled carbon nanotubes (MWCNTs-N<sub><i>x</i></sub>). Dark spots correspond to Fe catalyst-nanoparticles. (c) High resolution TEM image of MWCNT-N<sub><i>x</i></sub> showing the well-defined graphitic layers of carbon nanotube walls. (d) TEM image depicting oxygen-functionalized multiwalled carbon nanotubes (MWCNTs-O<sub><i>x</i></sub>) containing Fe inside.</div>

Journal of Materials

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Figure 5

Figure 5: Cement Pastes and Mortars Containing Nitrogen-Doped and Oxygen-Functionalized Multiwalled Carbon Nanotubes 