title: Growth and characterization of bamboo-shaped carbon nanotubes using nanocluster-assembled ZnO:Co thin films as catalyst.
abstract: Bamboo-shaped carbon nanotubes (CNTs) had been successfully fabricated by a plasma enhanced chemical vapor deposition method, in which nanocluster-assembled ZnO:Co thin film was used as catalyst. It was found that bamboo-shaped CNTs were generally grown in a direction perpendicularly to the substrate surface with the tops of CNTs dominated by the droplet-like catalyst covered by the carbon layer. The diameter of CNTs was ranged from 20-50 nm. High resolution of TEM image showed that the typical CNT had a multi-walled structure with an inner core presented. The ordered graphite layers were inclined to an axis of CNT about 18 degrees and the interlayer space of a CNT was about 0.35 nm. Two peaks in Raman spectrum at 1586 cm(-1) and 1372 cm(-1) were identified as G-band and D-band for graphite, respectively. The results showed that catalyst based on ZnO:Co thin films could be used for the growth of CNTs with bamboo-shaped structure.
authors.affiliation: School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China.
authors.forename: Z W
authors.initials: ZW
authors.lastname: Zhao
authors.forename: W
authors.initials: W
authors.lastname: Lei
authors.forename: X B
authors.initials: XB
authors.lastname: Zhang
authors.forename: B K
authors.initials: BK
authors.lastname: Tay
authors.forename: J S
authors.initials: JS
authors.lastname: Chen