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Issue 2, 2002
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Shape-controlled synthesis of nanostructured gold by a protection–reduction technique

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Abstract

We describe a novel method to control the shape and size of Au nanoparticles using a protection–reduction technique. The remarkable feature of this method is that the reducing and protecting agents were mixed first prior to addition to the solution of KAu(CN)2.The reactivity and concentration of reducing agent, the molar ratio of ascorbic acid (AA)/poly(vinylpyrrolidone) (PVP) and the redox potential of the Au complex anion have significant effects on the formation and growth of these novel nanostructures. The Au nanoparticles self-assembly into dendritic structures at molar ratios of AA/PVP > 7 while spherical and cubic nanoparticles form at ratios of AA/PVP ≤ 3 and 4–6, respectively. This simple and effective method can be used for other noble metals.

Graphical abstract: Shape-controlled synthesis of nanostructured gold by a protection–reduction technique

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Publication details

The article was received on 26 Apr 2001, accepted on 22 Oct 2001 and first published on 05 Dec 2001


Article type: Paper
DOI: 10.1039/B103767F
Citation: J. Mater. Chem., 2002,12, 384-387
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    Shape-controlled synthesis of nanostructured gold by a protection–reduction technique

    Q. F. Zhou, J. C. Bao and Z. Xu, J. Mater. Chem., 2002, 12, 384
    DOI: 10.1039/B103767F

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