Carbon nanotubes (CNTs) were grown from Co nanoparticles by thermal chemical vapor deposition using C2H2, H2, and Ar gases. The diameters of CNTs were limited by the sizes of the catalytic Co nanoparticles. From 5 nm Co nanoparticles, very long and straight CNTs with diameters below 5 nm were grown. C2H2 was so effective as the carbon feedstock that the required amount of C2H2 was only 0.1% of the total amount of gases to grow CNTs from 5 nm Co nanoparticles. For 8 nm Co nanoparticles, a long enough pretreatment time was essential in growing dense CNTs.
Bibliographical noteFunding Information:
This work was supported by the Ministry of Science and Technology of Korea through the Creative Research Initiative, by the Korea Ministry of Commerce, Industry, and Energy (nanostandardization 10001948) and National R&D Project for Nano Science and Technology. We also thank Mr. J.I. Park for his kind helps in nanoparticle synthesis.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry