A Facile Route to Synthesize Gold Prisms Up to Micrometer Scale Based on Slow Reduction Methods

Gold prisms with edge length ranges from nanometer to micrometer scale were prepared in large quantities through facile liquid-liquid interfacial reaction and solution-phase reactions. The technological keys to synthesis of gold microprisms are (i) selecting poly(N-vinylpyrrolidone) (PVP) as the sha...

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Bibliographic Details
Published in:Journal of dispersion science and technology 2011-02, Vol.32 (2), p.277-282
Main Authors: Liu, Aizhen, Cheng, Yingwen, Tian, Fang, Pan, Wei, Huang, Shaoxin, Feng, Xingli, Ma, Houyi
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Gold
Gold prism
Interface reactions
Nanocomposites
Nanomaterials
Nanostructure
Physical and chemical studies. Granulometry. Electrokinetic phenomena
poly(N-vinylpyrrolidone)(PVP)
Polyvinylpyrrolidone
preferential growth
Prisms
Reducing agents
Reduction
shape control
Surface physical chemistry
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Summary:Gold prisms with edge length ranges from nanometer to micrometer scale were prepared in large quantities through facile liquid-liquid interfacial reaction and solution-phase reactions. The technological keys to synthesis of gold microprisms are (i) selecting poly(N-vinylpyrrolidone) (PVP) as the shape-directing agent to induce the preferential growth of nanoprism seeds and (ii) using weak reducing agents to lower the reduction rate of gold ions so that gold ions were reduced slowly onto the surface of the growing nanoprisms. Thus, the reduction of ions in the presence of PVP by some weak reducing agents generated a large number of gold microprisms (as defined by edge length of prisms). On the contrary, the relatively fast reduction of ions could only lead to formation of spherical gold particles.
ISSN:0193-2691
1532-2351
DOI:10.1080/01932691003659361