Table 3.
Co-words analysis in Title, Abstract, Key words, and Key words plus from 2004 to 2017. There is no co- occurrence between silver, graphene, porous, ZnO, fullerene, and titanium. There is a high correlation between carbon nanotube and multi-walled carbon. Carbon contains carbon nanotube and multi-walled carbon.
| Carbon Nanotube | Silver | Multi-Walled Carbon | Graphene | Porous | ZnO | Carbon | Fullerene | Titanium | |
|---|---|---|---|---|---|---|---|---|---|
| carbon nanotubes | 0 | 129 | 0 | 0 | 0 | 602 | 0 | 0 | |
| silver | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| multi-walled carbon | 0 | 0 | 0 | 0 | 0 | 0 | |||
| graphene | 0 | 0 | 0 | 0 | 0 | ||||
| porous | 0 | 0 | 0 | 0 | |||||
| ZnO | 0 | 0 | 0 | ||||||
| carbon | 0 | 0 | |||||||
| fullerene | 0 | ||||||||
| titanium |