Colloid and Polymer Science

, Volume 279, Issue 5, pp 449–458

Structural properties of palladium nanoparticles embedded in inverse microemulsions

  • S. Papp
  • I. Dékány
ORIGINAL CONTRIBUTION

Abstract

Pd nanoparticles were synthesized by reduction of palladium acetate by ethanol in systems containing tetrahydrofuran (THF) as dispersion medium and tetradodecylammonium bromide (TDABr) surfactant as stabilizer. The polar phase (ethanol) acts at the same time as reducing agent. THF/TDABr/H2O inverse microemulsions containing micelles of various sizes were also prepared, and the structure of complex liquids was studied by density measurements. Sols containing nanosize Pd0 particles were synthesized within the water droplets of this micellar system. The stabilized Pd0/surfactant system was characterized by density measurements, absorption spectroscopy, and transmission electron microscopy. The stabilizing surfactant layer adsorbed on the liquid/liquid interface and on the surface of the nanoparticles (i.e., the liquid/solid interface) significantly reduced the excess volume for the palladium nanodispersion in organic solvent.

Key words Pd nanoparticles Microemulsions Stabilization of colloid particles Excess volume of solution Surfactants TEM 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • S. Papp
    • 1
  • I. Dékány
    • 1
  1. 1.Department of Colloid Chemistry and Nanostructured Materials Research Group of the Hungarian Academy of Science University of Szeged Aradi Vértanúk tere 1 H 6720 Szeged, Hungary e-mail: i.dekany@chem.u-szeged.huHU

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