Abstract
We have successfully synthesized the Co/Pd magnetic and nonmagnetic multisegment nanowires encapsulated inside multiwalled carbon nanotubes (MWCNTs) by using Co and Pd thin-layers deposited on Si substrate by microwave plasma enhanced chemical vapor deposition. Energy dispersive X-ray spectroscopy revealed that MWCNTs were encapsulated with Co and Pd nanowires, separately, at the tube top and the bottom of Co nanowire, respectively. The face-centered-cubic (fcc) structure of Co nanowires was confirmed by a selected area diffraction pattern. We proposed a fruitful description for the encapsulating mechanisms of both Co and Pd multisegment nanowires. The component of magnetic induction from Co region, not Pd region, was then estimated to be 1.2 ± 0.1 T, based on results of off-axis electron holography, which is lower than the expected saturation magnetization of fcc bulk Co of 1.7 T. We proposed a fruitful description for the mechanisms of reduced magnetic induction from Co nanowires.
| Original language | English |
|---|---|
| Pages (from-to) | 1525-1528 |
| Number of pages | 4 |
| Journal | Diamond and Related Materials |
| Volume | 17 |
| Issue number | 7-10 |
| DOIs | |
| Publication status | Published - Jul 2008 |
| Externally published | Yes |
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Keywords
- Encapsulation of multisegments
- Energy dispersive X-ray spectroscopy
- Multiwalled carbon nanotubes (MWCNTs)
- Off-axis electron holography
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Surfaces, Coatings and Films
- Surfaces and Interfaces
Cite this
Microstructure and local magnetic induction of segmented and alloyed Pd/Co nanocomposites encapsulated inside vertically aligned multiwalled carbon nanotubes. / Hayashi, Yasuhiko; Fujita, T.; Tokunaga, T.; Kaneko, K.; Tanemura, M.; Butler, T.; Rupesinghe, N.; Carey, J. D.; Silva, S. R P; Teo, K. B K; Amaratunga, G. A J.
In: Diamond and Related Materials, Vol. 17, No. 7-10, 07.2008, p. 1525-1528.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Microstructure and local magnetic induction of segmented and alloyed Pd/Co nanocomposites encapsulated inside vertically aligned multiwalled carbon nanotubes
AU - Hayashi, Yasuhiko
AU - Fujita, T.
AU - Tokunaga, T.
AU - Kaneko, K.
AU - Tanemura, M.
AU - Butler, T.
AU - Rupesinghe, N.
AU - Carey, J. D.
AU - Silva, S. R P
AU - Teo, K. B K
AU - Amaratunga, G. A J
PY - 2008/7
Y1 - 2008/7
N2 - We have successfully synthesized the Co/Pd magnetic and nonmagnetic multisegment nanowires encapsulated inside multiwalled carbon nanotubes (MWCNTs) by using Co and Pd thin-layers deposited on Si substrate by microwave plasma enhanced chemical vapor deposition. Energy dispersive X-ray spectroscopy revealed that MWCNTs were encapsulated with Co and Pd nanowires, separately, at the tube top and the bottom of Co nanowire, respectively. The face-centered-cubic (fcc) structure of Co nanowires was confirmed by a selected area diffraction pattern. We proposed a fruitful description for the encapsulating mechanisms of both Co and Pd multisegment nanowires. The component of magnetic induction from Co region, not Pd region, was then estimated to be 1.2 ± 0.1 T, based on results of off-axis electron holography, which is lower than the expected saturation magnetization of fcc bulk Co of 1.7 T. We proposed a fruitful description for the mechanisms of reduced magnetic induction from Co nanowires.
AB - We have successfully synthesized the Co/Pd magnetic and nonmagnetic multisegment nanowires encapsulated inside multiwalled carbon nanotubes (MWCNTs) by using Co and Pd thin-layers deposited on Si substrate by microwave plasma enhanced chemical vapor deposition. Energy dispersive X-ray spectroscopy revealed that MWCNTs were encapsulated with Co and Pd nanowires, separately, at the tube top and the bottom of Co nanowire, respectively. The face-centered-cubic (fcc) structure of Co nanowires was confirmed by a selected area diffraction pattern. We proposed a fruitful description for the encapsulating mechanisms of both Co and Pd multisegment nanowires. The component of magnetic induction from Co region, not Pd region, was then estimated to be 1.2 ± 0.1 T, based on results of off-axis electron holography, which is lower than the expected saturation magnetization of fcc bulk Co of 1.7 T. We proposed a fruitful description for the mechanisms of reduced magnetic induction from Co nanowires.
KW - Encapsulation of multisegments
KW - Energy dispersive X-ray spectroscopy
KW - Multiwalled carbon nanotubes (MWCNTs)
KW - Off-axis electron holography
UR - http://www.scopus.com/inward/record.url?scp=48849094896&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=48849094896&partnerID=8YFLogxK
U2 - 10.1016/j.diamond.2008.03.012
DO - 10.1016/j.diamond.2008.03.012
M3 - Article
AN - SCOPUS:48849094896
VL - 17
SP - 1525
EP - 1528
JO - Diamond and Related Materials
JF - Diamond and Related Materials
SN - 0925-9635
IS - 7-10
ER -