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Microstructure analyses of metal-filled carbon nanotubes synthesized by microwave plasma-enhanced chemical vapor deposition

Hayashi, Y, Tokunaga, T, Kaneko, K, Henley, SJ, Stolojan, V, Carey, JD and Silva, SRP (2006) Microstructure analyses of metal-filled carbon nanotubes synthesized by microwave plasma-enhanced chemical vapor deposition IEEE TRANSACTIONS ON NANOTECHNOLOGY, 5 (5). 485 - 490. ISSN 1536-125X

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Abstract

Pd/Co-based metal-filled carbon nanotubes (MF-CNTs) were synthesized by a microwave plasma-enhanced chemical vapor deposition method using a bias-enhanced growth technique. Pd/Co-based MF-CNTs were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) electron energy loss spectroscopy (EELS), and Raman spectroscopy. MF-CNTs were well-aligned and uniform in size on a Si substrate. Both multiwall nanotube carbon nanotubes (CNTs) and herringbone (or stacked cups structure) structures were observed. High-resolution TEM revealed that MF-CNTs were composed of highly ordered graphite layers, and the elemental maps of EELS indicate that both Co and Pd metals are present inside the nanotubes. TEM results clearly showed that both Pd and Co metals were successfully encapsulated into the CNTs. We observed a low value for the Raman intensity ratio between D (1355 cm(-1)) and G (1590 cm(-1)) bands with no shift of the G-peak position and no broadening of the G-peak, indicative of high-quality Pd/Co-based MF-CNTs. Based on TEM characterization, we propose a description for the encapsulating mechanisms.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Technology, Physical Sciences, Engineering, Electrical & Electronic, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Physics, Applied, Engineering, Science & Technology - Other Topics, Materials Science, Physics, electron energy loss spectroscopy (EELS), metal filled carbon nanotubes (CNTs), microwave plasma-enhanced chemical vapor deposition (MP-CVD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), RAMAN-SPECTRA, NANOFIBERS, NANOWIRES, ARRAY
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Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:08
Last Modified: 28 Nov 2013 14:01
URI: http://epubs.surrey.ac.uk/id/eprint/404

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