Encapsulation of Magnetic Particles in Metallic Hollow Nanospheres

Abstract

Novel metallic capsules containing magnetite with given size in the sub-micron range have been produced. These nanocapsules are prepared in several steps through a colloidal templating approach. The first step is the synthesis of size-selected SiO2 nanospheres. The second step is coating the SiO2nanospheres by electroless deposition with gold, in order to form a porous gold shell around the silica. Electroless deposition is controlled by the concentration of gold in the coating solution. Subsequently, the core (SiO2) was removed to obtain gold capsules. The final step is the inclusion of magnetite nanoparticles inside these nanocapsules and recoating the capsules with gold in order to have continuous encapsulation. The nanocapsule and core-shell structure have been characterized by TEM and DSC

This is a preview of subscription content, access via your institution.

References

  1. 1.

    F. Caruso, Adv. Mater. 13, 11 (2001).

    CAS  Article  Google Scholar 

  2. 2.

    R. Davies, G.A. Schurr, P. Meenan, R. D. Nelson, H. E. Bergna, P. Meenan, C. A. S. Brevett, R. H. Goldbaum, Adv. Mater. 10, 1264 (1998).

    CAS  Article  Google Scholar 

  3. 3.

    D.V. Leff, L. Brandt, J.R. Heath, Langmuir 12, 4723 (1996).

    CAS  Article  Google Scholar 

  4. 4.

    S. J. Oldenburg, R.D. Averitt, S.L. Westscott, N. J. Halas, Chem. Phys. Lett. 288, 243 (1998).

    CAS  Article  Google Scholar 

  5. 5.

    R. P. Andres, J.D. Bielefeld, J.I. Henderson, D.B. Janes, V.R. Kolagunta, C. P. Kubiak, W. J. Mahoney, R. J. Osifchin, Science 273, 1690 (1996).

    CAS  Article  Google Scholar 

  6. 6.

    S. L. Westcott, S. J. Oldenburg, T.R. Lee, N. J. Halas, Langmuir 14, 5396 (1998).

    CAS  Article  Google Scholar 

  7. 7.

    D.V. Goia, E. Matijevic, New J. Chem., 1203 (1998).

    Google Scholar 

  8. 8.

    F. Caruso, A. S. Susha, M. Giersig, H. Möhwald, Adv. Mater. 11, 950 (1999).

    CAS  Article  Google Scholar 

  9. 9.

    A. Rogach, A. Susha, F. Caruso, G. Sukhorukov, A. Kornowski, S. Kershaw, H. Möhwald, A. Eychmüller, H. Weller, Adv. Mater. 12, 333 (2000).

    CAS  Article  Google Scholar 

  10. 10.

    W. Stöber, A. Fink, E. Bohn, J. Colloid Interface Sci. 26, 62 (1968).

    Article  Google Scholar 

  11. 11.

    R.D. Badley, W.T. Ford, F. J. McEnroe, R. A. Assink, Langmuir 6, 792 (1990).

    CAS  Article  Google Scholar 

  12. 12.

    A. van Blaaderen, A. Vrij, J.Colloid Interface Sci. 156, 1 (1993).

    Article  Google Scholar 

  13. 13.

    T.G. Waddell, D. E. Leyden, M. T. DeBello, J Am. Chem. Soc. 103, 5303 (1981).

    CAS  Article  Google Scholar 

  14. 14.

    K.C. Grabar, K.J. Allison, B.E. Baker et al., Langmuir 12, 2353 (1996).

    CAS  Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to M. Toprak.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Toprak, M., Kim, D.K., Mikhailova, M. et al. Encapsulation of Magnetic Particles in Metallic Hollow Nanospheres. MRS Online Proceedings Library 704, 3291 (2001). https://doi.org/10.1557/PROC-704-W6.29.1

Download citation