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Heterogeneous nucleation and growth of silver nanoparticles on unmodified polystyrene spheres by in situ reduction

Authors
Journal
Applied Surface Science
0169-4332
Publisher
Elsevier
Publication Date
Volume
256
Issue
8
Identifiers
DOI: 10.1016/j.apsusc.2009.11.013
Keywords
  • Silver
  • Nucleation
  • In Situ Reduction
  • Crystal Growth
  • Composite Particles

Abstract

Abstract The in situ reduction growth of Ag nanoparticles (NPs) on unmodified polystyrene (PS) spheres is investigated via controlling Ag nucleation and growth rates by continuous dripping addition of reductant solution in the absence of surfactants. The sub-micro PS spheres were coated by a uniform coverage of Ag NPs with several shapes like elongated islands, spherical particles, and particle aggregates. The reaction temperature and reductant concentration are demonstrated to influence the crystal structure, distribution, and stability of the Ag NPs on the PS substrates. The heterogeneous nucleation and growth of Ag NPs on PS spheres are found to depend on the inhibition of in-solution reduction and homogeneous nucleation.

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