Temperature-dependent resistivity measurements were carried out on bamboo-shaped multiwalled carbon nanotubes (CNT) grown on cobalt-catalyst-deposited A12O3/Ti substrates by a thermal chemical vapor deposition. The resistivity decreased with increasing growth temperature, and a reduced activation energy analysis showed that the CNT moved from the critical regime to the metallic regime with increasing growth temperature. The improved electrical conductivity with increasing growth temperature is attributed to the improved crystallinity and the increased diameters of the CNT.
Bibliographical noteFunding Information:
This work was supported by the Korea Ministry of Science and Technology (grant no. MZ0106000049-0180500-00610 National Research Laboratory), the Korea Research Foundation (BK21), and was also supported by the Electronics and Telecommunications Research Institute.
- A. Nanostructures
- B. Thermal chemical vapor deposition
- C. Scanning and transmission electron microscopy
- D. Electronic transport
ASJC Scopus subject areas
- Condensed Matter Physics
- Materials Chemistry