We report on the use of silicon nanocrystals (Si-ncs) to activate nucleation and growth of carbon nanotubes (CNTs) without using any metal catalyst. Si-ncs with different surface characteristics have been exposed to the same CH 4 low-pressure plasma treatment producing quite different results. Specifically, Si-ncs prepared by laser ablation in water have contributed to the formation of micrometre-sized silicon spherical particles. On the other hand, Si-ncs prepared by electrochemical etching did not induce any specific growth while the third type of Si-ncs, prepared by electrochemical etching and treated by a laser fragmentation process, induced the growth of multi-walled CNTs. The different outcomes of the same plasma process are attributed to the diverse surface features presented by the Si-ncs.
|Journal||Journal of Physics D: Applied Physics|
|Publication status||Published - 2013|
Mariotti, D., Svrcek, V., Mathur, A., Dickinson, C., Matsubara, K., & Kondo, M. (2013). Carbon nanotube growth activated by quantum-confined silicon nanocrystals. Journal of Physics D: Applied Physics, 46(12), 122001. http://stacks.iop.org/0022-3727/46/i=12/a=122001