Hostname: page-component-669899f699-cf6xr Total loading time: 0 Render date: 2025-04-27T13:39:42.232Z Has data issue: false hasContentIssue false
  • English
  • Français

Colloidal Preparation of γ-Fe2O3@Au [core@shell] Nanoparticles

Published online by Cambridge University Press:  15 February 2011

Jiye Fang ,
Jibao He ,
Eun Young Shin ,
Deborah Grimm ,
Charles J. O'Connor  and
Moo-Jin Jun
Jiye Fang
Affiliation:
Department of Chemistry and AMRI, University of New Orleans, New Orleans, LA 70148
Jibao He
Affiliation:
Coordinated Instrument Facility, Tulane University, New Orleans, LA 70118
Eun Young Shin
Affiliation:
Department of Chemistry, Yonsei University, Seoul, 120-749 Korea
Deborah Grimm
Affiliation:
Coordinated Instrument Facility, Tulane University, New Orleans, LA 70118
Charles J. O'Connor
Affiliation:
Department of Chemistry and AMRI, University of New Orleans, New Orleans, LA 70148
Moo-Jin Jun
Affiliation:
Department of Chemistry, Yonsei University, Seoul, 120-749 Korea
Get access

Abstract

γ-Fe2O3@Au core-shell nanoparticles were prepared through a combined route, in which high temperature organic solution synthesis and colloidal microemulsion techniques were successively applied. High magnification of TEM reveals the core-shell structure. The presence of Au on the surface of as-prepared particles is also confirmed by UV-Vis absorption. The magnetic core-shell nanoparticles offer a promising application in bio- and medical systems.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 774: Symposium O – Materials Inspired by Biology , 2003 , O7.15
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.)

Article purchase

Temporarily unavailable

References

1. Lin, J., Zhou, W., Kumbhar, A., Wiemann, J., Fang, J., Carpenter, E. E. and , C. J. O'Connor, 159, 26 (2001).Google Scholar
2. Hyeon, T., Lee, S. S., Park, J., Chung, Y. and Na, H. B., J. Am. Chem. Soc., 123, 12798 (2001).Google Scholar
3. Ji, T., Jian, W.-B., Fang, J., Tang, J., V. and Spinu, L., IEEE Trans. Mag., in press (2003).Google Scholar
4. Fang, J., Stokes, K. L., Zhou, W. L., Wang, W. and Lin, J., Chem. Commun., 1872 (2001).Google Scholar
5. Underhill, R. S., Jovanovic, A. V., Carino, S. R., Varshney, M., Shah, D. O., Dennis, D. M., Morey, T. E. and Duran, R. S., Chem. Mater., 14, 4919 (2002).Google Scholar
6. Brust, M., Walker, M., Bethell, O., Schiffrin, D. J. and Whyman, R., Chem. Commun., 801 (1994). The Procedure of preparing Au3+ in organic phase in this work is as follows: An aqueous solution of HAuCl4 (10ml, 0.03M) was mixed with a solution of tetraoctyl-ammonium bromide in toluene (25ml, 0.05M) with vigorously stirring. Once the aqueous phase became colorless, 0.05g of 1-dodecanethiol was added to the toluene layer. 4 ml of such toluene solution was taken from the organic layer and was mixed with 0.55g of hexadecane and certain amount of toluene suspension containing 0.075 mmol of γ-Fe2O3. The toluene in this mixture was then removed under vacuum until the total weight of the mixture was close to ˜0.60g.Google Scholar
7. Klug, H. P., Alexander, L. E., “X-ray diffraction procedures for polycrystalline and amorphous materials, Wiley, New York, 1954, p. 512.Google Scholar
8. Carpenter, E. E., Sangregorio, C., O'Connor, C. J., IEEE Trans. Mag., 35(5), 3495 (1999).Google Scholar
9.(a) Kreibig, U., Gartz, M. and Hilger, A., Ber. Bunsenges. Phys. Chem., 101, 1593 (1997); (b) H. Hoevel, S. Fritz, A. Hilger, U. Kreibig and M. Vollmer, Phys. Rev. B, 48, 18178 (1993); (c) S. Link, M. A. El-Sayed, J. Phys. Chem. B, 103, 4212 (1999); (d) R. D. Averitt, D. Sarkar and N. J. Halas, Phys. Rev. Lett., 78, 4217 (1997).Google Scholar
10.This molar percentage based on the determination from EDS is only for a relative comparison. It may not be the real composition value in core-shell particles as we assume that Au may partially self-aggregate intra-particles.Google Scholar