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Issue 38, 2012
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Controllable synthesis of gold nanoparticles with ultrasmall size and high monodispersity via continuous supplement of precursor

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Abstract

Synthesis of monodisperse small Au nanoparticles in a controllable manner is of great importance for fundamental science and technical applications. Here, we report a “precursor continuous-supply” strategy for controllable synthesis of 0.9–3.3 nm Au nanoparticles with a narrow size distribution of 0.1–0.2 nm, using a weak reductant to slow-down the reducing rate of AuClPPh3 precursor in ethanol. Time-dependent X-ray absorption and UV-Vis absorption measurements revealed that owing to the joint use of AuClPPh3 and ethanol, the remnant AuClPPh3 was self-supplied and the precursor concentration was maintained at a level near to its equilibrium solubility (ca. 1.65 mmol L−1) in ethanol. Hence the nucleation duration was extended that focused the initial size distribution of the Au clusters. With reaction going on for 58 min, most of AuClPPh3 with a nominal Au concentration of 17.86 mmol L−1 was converted to ethanol-soluble Au clusters with a size of about 1.0 nm, resulting in a high-yield synthesis.

Graphical abstract: Controllable synthesis of gold nanoparticles with ultrasmall size and high monodispersity via continuous supplement of precursor

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Publication details

The article was received on 27 Apr 2012, accepted on 30 Jul 2012 and first published on 01 Aug 2012


Article type: Paper
DOI: 10.1039/C2DT31270K
Citation: Dalton Trans., 2012,41, 11725-11730
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    Controllable synthesis of gold nanoparticles with ultrasmall size and high monodispersity via continuous supplement of precursor

    Y. Li, S. Liu, T. Yao, Z. Sun, Z. Jiang, Y. Huang, H. Cheng, Y. Huang, Y. Jiang, Z. Xie, G. Pan, W. Yan and S. Wei, Dalton Trans., 2012, 41, 11725
    DOI: 10.1039/C2DT31270K

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