Colloid and Polymer Science

, Volume 288, Issue 3, pp 257–263

Formation of organically and inorganically passivated CdS nanoparticles in reverse microemulsions

Authors

    • Institut für ChemieUniversität Potsdam
  • Kornelia Gawlitza
    • Institut für ChemieUniversität Potsdam
  • Sabine Kosmella
    • Institut für ChemieUniversität Potsdam
Original Contribution

DOI: 10.1007/s00396-009-2154-5

Cite this article as:
Koetz, J., Gawlitza, K. & Kosmella, S. Colloid Polym Sci (2010) 288: 257. doi:10.1007/s00396-009-2154-5

Abstract

This paper is focused on the formation of organically and inorganically passivated cadmium sulfide (CdS) nanoparticles in two different types of microemulsions. On the one hand, we used a ternary inverse microemulsion consisting of water, heptanol, and 3-(N,N-dimethyldodecylammonio)propanesulfonate and on the other hand, a poly(ethyleneimine)-based quaternary microemulsion containing water, toluene, pentanol, and sodium dodecylsulfate. UV-vis measurements confirm the formation of CdS-ZnS core-shell nanoparticles in the ternary microemulsion. Using the quaternary microemulsion template phase, polymer capped luminescent CdS nanoparticles can be formed. After a complete solvent evaporation, the nanoparticles are redispersed in water and characterized by means of dynamic light scattering and transmission electron microscopy. From the ternary microemulsion, well-stabilized CdS-ZnS core-shell nanoparticles with diameters of about 5 nm can be redispersed, but from the quaternary microemulsion, only nanoparticle aggregates of about 100 nm.

Keywords

MicroemulsionsCore-shell nanoparticlesCadmium sulfideZinc sulfidePolymer capped nanoparticles

Copyright information

© Springer-Verlag 2009