Increasing the efficiency of single walled carbon nanotube amplification by Fe-Co catalysts through the optimization of CH4/H2 partial pressures.
Nano Lett
; 11(7): 2871-4, 2011 Jul 13.
Article
en En
| MEDLINE
| ID: mdl-21696188
ABSTRACT
Single walled carbon nanotubes (SWNTs) seeds are grown using Fe-Co nanoparticles on spin-on-glass. The relative efficiency of nucleation and amplification (versus etching) was investigated as a function of the CH(4)/H(2) feedstock ratio and growth temperature. At 900 °C, maximum amplification is obtained with CH(4)/H(2) ratio of 8020 but 6040 for nucleation. Amplification is further enhanced at 800 °C, compared with etching dominating at 1000 °C. Amplification of SWNTs is in equilibrium with etching; higher carbon feedstock pressure and decreased temperature increase the rate of amplification; the converse increases etching.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Cobalto
/
Nanotubos de Carbono
/
Hidrógeno
/
Hierro
/
Metano
Idioma:
En
Revista:
Nano Lett
Año:
2011
Tipo del documento:
Article
País de afiliación:
Estados Unidos