Abstract
Double-walled carbon nanotubes (DWCNTs) were synthesized by using thermal chemical vapor deposition on MgO-supported Fe-Mo catalysts, in the temperature range 800-1000 °C. Outer diameters were 1.5-2 nm at all growth temperatures. As growth temperature was increased, C1s peaks of X-ray photoelectron spectroscopy became broader and valence band intensity increased due to stronger van der Waals interaction between DWCNTs induced by higher crystallinities. Field emission from the as-grown DWCNTs exhibited a large current density enhancement with increasing growth temperature.
Original language | English |
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Pages (from-to) | 271-276 |
Number of pages | 6 |
Journal | Chemical Physics Letters |
Volume | 420 |
Issue number | 4-6 |
DOIs | |
Publication status | Published - 2006 Mar 21 |
Bibliographical note
Funding Information:This work was supported by KRF (R14-2003-033-01003-0; R02-2004-000-10025-0; 2003-015-C00265). SEM and TEM analysis were performed at the Korea Basic Science Institute (KBSI). Experiments at PLS were supported in part by MOST and POSTECH.
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry