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.
| Original language | English |
|---|---|
| Article number | 1695946 |
| Pages (from-to) | 485-490 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Nanotechnology |
| Volume | 5 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Sep 2006 |
| Externally published | Yes |
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Keywords
- 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)
ASJC Scopus subject areas
- Engineering(all)
- Hardware and Architecture
Cite this
Microstructure analyses of metal-filled carbon nanotubes synthesized by microwave plasma-enhanced chemical vapor deposition. / Hayashi, Yasuhiko; Tokunaga, Tomoharu; Kaneko, Kenji; Henley, Simon J.; Stolojan, Vlad; Carey, J. David; Silva, S. R P.
In: IEEE Transactions on Nanotechnology, Vol. 5, No. 5, 1695946, 09.2006, p. 485-490.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Microstructure analyses of metal-filled carbon nanotubes synthesized by microwave plasma-enhanced chemical vapor deposition
AU - Hayashi, Yasuhiko
AU - Tokunaga, Tomoharu
AU - Kaneko, Kenji
AU - Henley, Simon J.
AU - Stolojan, Vlad
AU - Carey, J. David
AU - Silva, S. R P
PY - 2006/9
Y1 - 2006/9
N2 - 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.
AB - 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.
KW - Electron energy loss spectroscopy (EELS)
KW - Metal filled carbon nanotubes (CNTs)
KW - Microwave plasma-enhanced chemical vapor deposition (MP-CVD)
KW - Scanning electron microscopy (SEM)
KW - Transmission electron microscopy (TEM)
UR - http://www.scopus.com/inward/record.url?scp=33749009726&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33749009726&partnerID=8YFLogxK
U2 - 10.1109/TNANO.2006.880456
DO - 10.1109/TNANO.2006.880456
M3 - Article
AN - SCOPUS:33749009726
VL - 5
SP - 485
EP - 490
JO - IEEE Transactions on Nanotechnology
JF - IEEE Transactions on Nanotechnology
SN - 1536-125X
IS - 5
M1 - 1695946
ER -