Gas dwell time control for rapid and long lifetime growth of single-walled carbon nanotube forests.
Nano Lett
; 11(9): 3617-23, 2011 Sep 14.
Article
em En
| MEDLINE
| ID: mdl-21823602
ABSTRACT
The heat history (i.e., "dwell time") of the carbon source gas was demonstrated as a vital parameter for very rapid single-walled carbon nanotube (SWNT) forest growth with long lifetime. When the dwell time was raised to 7 s from the 4 s used for standard growth, the growth rate increased to 620 µm/min a benchmark for SWNT forest growth on substrates. Importantly, the increase in growth rate was achieved without decreasing either the growth lifetime or the quality of the SWNTs. We interpret that the conversion rate of the carbon feedstock into CNTs was selectively increased (versus catalyst deactivation) by delivering a thermally decomposed carbon source with the optimum thermal history to the catalyst site.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Nanotecnologia
/
Nanotubos de Carbono
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article