Microstructure and local magnetic induction of segmented and alloyed Pd/Co nanocomposites encapsulated inside vertically aligned multiwalled carbon nanotubes

Yasuhiko Hayashi, T. Fujita, T. Tokunaga, K. Kaneko, M. Tanemura, T. Butler, N. Rupesinghe, J. D. Carey, S. R P Silva, K. B K Teo, G. A J Amaratunga

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 languageEnglish
Pages (from-to)1525-1528
Number of pages4
JournalDiamond and Related Materials
Volume17
Issue number7-10
DOIs
Publication statusPublished - Jul 2008
Externally publishedYes

Fingerprint

Electromagnetic induction
Multiwalled carbon nanotubes (MWCN)
magnetic induction
Nanowires
Nanocomposites
nanocomposites
nanowires
carbon nanotubes
microstructure
Microstructure
Electron holography
encapsulating
Saturation magnetization
Plasma enhanced chemical vapor deposition
holography
Diffraction patterns
diffraction patterns
Microwaves
vapor deposition
tubes

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 journalArticle

Hayashi, Y, Fujita, T, Tokunaga, T, Kaneko, K, Tanemura, M, Butler, T, Rupesinghe, N, Carey, JD, Silva, SRP, Teo, KBK & Amaratunga, GAJ 2008, 'Microstructure and local magnetic induction of segmented and alloyed Pd/Co nanocomposites encapsulated inside vertically aligned multiwalled carbon nanotubes', Diamond and Related Materials, vol. 17, no. 7-10, pp. 1525-1528. https://doi.org/10.1016/j.diamond.2008.03.012
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. / Microstructure and local magnetic induction of segmented and alloyed Pd/Co nanocomposites encapsulated inside vertically aligned multiwalled carbon nanotubes. In: Diamond and Related Materials. 2008 ; Vol. 17, No. 7-10. pp. 1525-1528.
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