| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5360749 | Applied Surface Science | 2008 | 6 Pages |
Abstract
The effect of oxidant species forming an alcohol molecule for hot-filament chemical vapor deposition (HFCVD) on single-walled carbon nanotubes (SWCNTs) growth has been investigated. To use a graphite rod as a filament for HFCVD to decompose alcohol sources, contamination-free sample surface can be obtained and SWCNTs are successively and densely grown at a lower temperature than those by conventional thermal CVD. It is found that the higher the molecule number of alcohol among CH3OH, C2H5OH, and 2-C3H7OH is, the lower the initial growth rate of SWCNTs is. As for CH3OH, diameter distribution of SWCNTs is dynamically changed with the growth time passed, and a negative growth rate is observed at the later stage of growth. The growth kinetics depending on the alcohol sources is discussed on the basis of a capability of the oxidant species to burn away SWCNTs and deactivation of Co catalysts used for the growth.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Satoshi Oida, Akira Sakai, Osamu Nakatsuka, Masaki Ogawa, Shigeaki Zaima,