Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-08T09:17:18.114Z Has data issue: false hasContentIssue false
  • English
  • Français

Salt-Induced Block Copolymer Micelles as Nanoreactors for the Formation of CdS Nanoparticles

Published online by Cambridge University Press:  15 March 2011

Hanying Zhao  and
Elliot P. Douglas
Hanying Zhao
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA
Elliot P. Douglas
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA
Get access

Abstract

A novel preparation method of CdS nanoparticles in the core or corona of micelles is presented. Poly(styrene-block-2-vinylpyridine) (PS-b-P2VP) and cadmium ions form aggregates of single micelles, called compound micelles, upon addition of the cadmium acetate salt into a solution of the block copolymer in tetrahydrofuran. The growth of CdS nanoparticles is confined to the core of single micelles after introduction of hydrogen sulfide gas into the solution. UV-visible spectroscopy, fluorescence spectroscopy, and transmission electron microscopy were employed to characterize the prepared core-embedded CdS nanoparticles. Corona-embedded CdS nanoparticles were prepared by dropping the core-embedded CdS nanoparticles into water with a low pH value. The location change of the CdS nanoparticles was accompanied by a structural change of the micelles, a change from compound micelles to single micelles. In a single micelle, CdS nanoparticles distribute randomly in the corona. The size of the nanoparticles increases slightly after the transition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 703: Symposia U/V – Nanophase and Nanocomposite Materials IV , 2001 , V2.3
Copyright
Copyright © Materials Research Society 2002

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. Henglein, A., Chem. Rev. 89, 1861 (1989).Google Scholar
2. Spanhel, L., Hoasse, M., Weller, H. J. and Henglein, A., J. Am. Chem. Soc., 109, 5649 (1987).Google Scholar
3. Henglein, A. and Gutierrez, M., Ber, M.. Bunsenges. Phys. Chem., 87, 852 (1983).Google Scholar
4. Wang, Y. and Herron, N., J. Phys. Chem., 95, 525 (1991).Google Scholar
5. McConnell, W. P., Novak, J. P., Brousseau, L. C., Fuierer, R. R., Tenent, R. C. and Feldheim, D. L., J. Phys. Chem. B, 104, 8925 (2000).Google Scholar
6. Antonietti, M., Wenz, E., Bronstein, L., Seregina, M., M. Adv. Mater., 7, 1000 (1995).Google Scholar
7. Antonietti, M., Forster, S., Hartmann, J. and Oestreich, S., S, Macromolecules 29, 3800 (1996).Google Scholar
8. Zhao, H., Douglas, E. P., Harrison, B. S. and Schanze, K. S., Langmur, in pressGoogle Scholar
9. Zhao, H. and Douglas, E. P., submitted to Chemistry of Materials Google Scholar
10. Mayer, A. B. R., Polym. Adv. Technol., 12, 96 (2001).Google Scholar