Hostname: page-component-8448b6f56d-jr42d Total loading time: 0 Render date: 2024-04-19T07:06:22.311Z Has data issue: false hasContentIssue false
  • English
  • Français

Production Of CoPt Alloy Grains Within Protein Templates

Published online by Cambridge University Press:  11 February 2011

Barnaby Warne  and
Eric L. Mayes
Barnaby Warne
Affiliation:
Research chemist, NanoMagnetics Ltd., 108 Longmead Road, Emersons Green, Bristol, BS16 7FG, United Kingdom Tel: +44 1179 104160, Fax: +44 1179 104161, E-mail: bwarne@nanomagnetics.com
Eric L. Mayes
Affiliation:
Research chemist, NanoMagnetics Ltd., 108 Longmead Road, Emersons Green, Bristol, BS16 7FG, United Kingdom Tel: +44 1179 104160, Fax: +44 1179 104161, E-mail: bwarne@nanomagnetics.com
Get access

Abstract

The spherical protein ferritin can be used as a generic reaction vessel for the production of a variety of materials, such as iron and manganese oxides. Here, its use for the aqueous production of nanoparticles of equiatomically alloyed CoPt is demonstrated. These have been considered for ultrahigh density magnetic recording as well as permanent magnetic materials. This monodisperse protein strictly regulates the maximum diameter of nanocrystals synthesized within its 8 nm diameter cavity. As a consequence of its external uniformity, it decouples the formation of highly regular self-patterned films from any size distribution associated with the synthesized material. Further, its 2 nm-thick protein coating discourages sintering of particles at temperatures required for the transformation to the L10 phase required for magnetic recording applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 735: Symposium C – Bioinspired Nanoscale Hybrid Systems , 2002 , C11.48
Copyright
Copyright © Materials Research Society 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Choe, G., Zhou, J. N., Demczyk, B., Yu, M., Zheng, M., Weng, R., Chekanov, A., Johnson, K. E., Liu, F., and Stoev, K., TMRC, Paper B1, Aug. 2002.Google Scholar
2. Wood, R., IEEE Trans. Mag., vol. 36, pp. 36–42, 2000.Google Scholar
3. Sun, S., Weller, D. and Murray, C. B., Plumer, M. L., van Ek, J., and Weller, D., Eds. New York: Springer, 2001, pp. 249–276.Google Scholar
4. Sellmyer, D. J., Luo, C. P., Yan, M. L., and Liu, Y., IEEE Trans. Magn., vol. 37, pp. 1286–1291, 2001.Google Scholar
5. Weller, D., Moser, A., Folks, L., Best, M. E., Lee, W., Toney, M. F., Schwickert, M., Thiele, J. U., and Doerner, M. F., IEEE Trans. Magn., vol. 36, pp. 10–15, 2000.Google Scholar
6. Sun, S. and Weller, D., J. Mag. Soc. Japan, vol. 25, pp. 1434–1440, 2001.Google Scholar
7. Sun, S., Murray, C. B., Weller, D., Folks, L., and Moser, A., Science, vol. 287, pp. 1989–1992, 2000.Google Scholar
8. Weller, D., Seagate Technology, Pittsburgh, PA, personal communication, 2001.Google Scholar
9. Zeng, H., Sun, S., Vedantam, T. S., Liu, J. P., Dai, Z., and Wang, Z., Appl. Phys. Lett., vol. 80, pp. 2583–2585, 2002.Google Scholar
10. Warne, B., Kasyutich, O. I., Mayes, E. L., Wiggins, J. A. L., and Wong, K. K. W., IEEE Trans. Magn., vol. 36, pp. 3009–3011, 2000.Google Scholar
11. Tsang, S. C., Qiu, J., Harris, P. J. F., Fu, Q. J., and Zhang, N., Chem. Phys. Lett., vol. 322, pp. 553–560, 2000.Google Scholar
12. Harrison, P. M., Artymiuk, P. J., Ford, G. C., Lawson, D. M., Smith, J. M. A., Treffry, A., and White, J. L., “Ferritin: function and structural design of an iron-storage protein” in Biomineralization: chemical and biochemical perspectives, Mann, S., Webb, J., and Williams, R. J. P., Eds. Weinheim: VCH, 1989, pp. 257–294.Google Scholar
13. Meldrum, F. C., Douglas, T., Levi, S., Arosio, P. and Mann, S. J. Inorg. Biochem., vol. 58, pp. 59–68, 1995.Google Scholar
14. Wong, K. K. W., Douglas, T., Gider, S., Awschalom, D. D. and Mann, S., Chem. Mat., vol. 10, pp. 279–285, 1998.Google Scholar
15. Wong, K. K. W. and Mann, S., “Biomimetic synthesis of cadmium sulfide-ferritin nanocomposites,” Adv. Mater., vol. 8, pp. 928–933, 1996.Google Scholar
16. Mayes, E. L., J. Mag. Soc. Japan, vol. 26, pp. 932–935, 2002.Google Scholar
17. Nagayama, K., Takeda, S., Endo, S., and Yoshimura, H., Jpn. J. Appl. Phys., vol. 34, pp. 3947–3954, 1995.Google Scholar
18. Funk, F., Lenders, J. P., Crichton, R. R. and Scheinder, W., Euro. J. Biochem., vol. 152, pp. 167–172, 1985.Google Scholar