期刊
APPLIED SURFACE SCIENCE
卷 256, 期 8, 页码 2654-2660出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2009.11.013
关键词
Silver; Nucleation; In situ reduction; Crystal growth; Composite particles
类别
资金
- State Key Program for Basic Research of China [2004CB619305-2010CB631004]
- National Natural Science Foundation of China [50831004]
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. (C) 2009 Elsevier B.V. All rights reserved.
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