Vertical array growth of small diameter single-walled carbon nanotubes.
A hot filament chemical vapor deposition method has been developed to grow vertical array single-walled carbon nanotubes (SWNTs). In this study, a hot filament (temperature greater than 2000 degrees C) was used to activate gas mixtures of hydrogen and carbon containing species at sub-atmospheric pressures. Silicon substrates decorated with islands of iron were directly inserted into a preheated furnace in which a hot filament is activating the gas. Vertical arrays of SWNTs are produced with diameters ranging from 0.78 to 1.6 nm. The samples were characterized with Raman and fluorescence spectroscopy and SEM and TEM microscopy.
Xu
Ya-Qiong
YQ
Department of Electrical & Computer Engineering, Rice University, MS-100, 6100 Main Street, Houston, Texas 77005, USA.
Flor
Erica
E
Kim
Myung Jong
MJ
Hamadani
Behrang
B
Schmidt
Howard
H
Smalley
Richard E
RE
Hauge
Robert H
RH