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Growth and Characterization of Magnetic Nanostructures on Carbon Nanotube Templates

Published online by Cambridge University Press:  21 March 2011

Yihong Wu ,
Peiwen Qiao  and
Towchong Chong
Yihong Wu
Affiliation:
Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576 and Data Storage Institute, 5 Engineering Drive 1, Singapore 117608
Peiwen Qiao
Affiliation:
Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576 and Data Storage Institute, 5 Engineering Drive 1, Singapore 117608
Towchong Chong
Affiliation:
Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576 and Data Storage Institute, 5 Engineering Drive 1, Singapore 117608
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Abstrat

We describe the growth of magnetic nanostructures on carbon nanotube templates. The nanotubes were grown by microwave plasma enhanced chemical vapour deposition. The as grown nanotubes were aligned reasonably well around the substrate normal directions. Although the nanotubes were quite straight, there were still some bent and tilt as revealed by the scanning electron microscope observations. Magnetic field has been used to re-align or re-assemble the nanotubes before they were used as the templates to grow magnetic nanostructures. Depending on whether there is a magnetic particle on the top tip of each nanotube and the density of the nanotubes, there are two different consequences of applying a magnetic field to the nanotubes. For nanotubes with magnetic particles attached to their top tips, the post-growth treatment by the magnetic field resulted in re-assembly of the nanotubes into micro-umbrella type of structures. For those without magnetic particles, however, the effect of magnetic field treatment is negligible; but after the deposition of thin magnetic layers, the field treatment made the nanotubes much straighter than what they originally were and aligned almost vertically to the substrates. The re-aligned or re-assembled nanotubes were used as the templates to grow magnetic nanostructures. It was found that most of the magnetic nanostructures exhibited characteristics similar to those of magnetic nanowires.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 676: Symposium Y – Synthesis, Functional Properties and Applications of Nanostructures , 2001 , Y5.7
Copyright
Copyright © Materials Research Society 2001

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References

REFERENCES

1. Dresselhaus, M. S., Dresselhaus, G., and Eklund, P. C., Science of Fullerenes and Carbon Nanotubes (Academic, New York, 1996).Google Scholar
2. Wong, E. W., Sheehan, P. E., and Lieber, C. M., Science 277, 1971 (1997).Google Scholar
3. Falvo, M. R., Clary, C. J., Taylor, R. M., Chi, V., Brooks, F. P., Washburn, S., and Superfine, R., Nature 389, 582 (1997).Google Scholar
4. Frank, S., Poncharal, P., Wang, Z. L., and de Heer, W. A., Science 280, 1744 (1998).Google Scholar
5. Batchtold, A., Strunk, C., Salvetat, J. P., Bonard, J. M., Forro, L., Nussbaumer, T., and Schonenberger, C., Nature 397, 673 (1999).Google Scholar
6. Li, W. Z., Xie, S. S., Qian, L. X., Chang, B. H., Zou, B. S., Zhou, W. Y., Zhao, A., and Wang, G., Science 274, 1701 (1996).Google Scholar
7. Fan, S. S., Chapline, M. G., Franklin, N. R., Tombler, T. W., Cassell, A. M., and Dai, H. J., Science 283, 512 (1999).Google Scholar
8. Ren, Z. F., Huang, Z. P., Wang, D. Z., Wen, J. G., Xu, J. W., Wang, J. H., Calvet, L. E., Chen, J., Klemic, J. F., and Reed, M. A., Appl. Phys. Lett. 75, 1086 (1999).Google Scholar
9. Qin, L. C., Zhou, D., Krauss, A. R., and Gruen, D. M., Appl. Phys. Lett. 72, 3437 (1998).Google Scholar
10. Tsai, S. H., Chao, C. W., Lee, C. L., and Shih, H. C., Appl. Phys. Lett. 74, 3462 (1999).Google Scholar
11. Bower, C., Zhu, W., Jin, S., and Zhou, O., Appl. Phys. Lett. 77, 830 (2000).Google Scholar
12. Bower, C., Zhou, O., Zhu, W., Werder, D. J., and Jin, S. H., Appl. Phys. Lett. 77, 2767 (2000).Google Scholar
13. Hirakawa, M., Sonoda, S., Tanaka, C., Murakami, H., and Yamakawa, H., Appl. Surf. Sci. 169–170, 662 (2001).Google Scholar
14. Zhang, Y. and Dai, H. J., Appl. Phys. Lett. 77, 3015 (2000).Google Scholar
15. Lardner, T. J. and Archer, R. R., Mechanics of Solids - an introduction (McGraw-Hill, Inc., New York, 1994), Vol., Chap. 6, p. 746–747.Google Scholar