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Issue 34, 2011
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Inhibited and enhanced nucleation of gold nanoparticles at the water|1,2-dichloroethane interface

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Abstract

The deposition of gold at the interface between immiscible electrolyte solutions has been investigated using reduction of tetrachloroaurate or tetrabromoaurate in 1,2-dichloroethane, with aqueous phase hexacyanoferrate as reducing agent. In a clean environment without defects present at the interface, the Au(III) complex was reduced to the Au(I) complex, but no solid phase formation could be observed. A deposition process could only be observed through the addition of artificial nucleation sites in the form of palladium nanoparticles at the interface. This process could be associated with the reduction of the Au(I) halide complex to metallic gold, by determining the gold reduction potentials in 1,2-dichloroethane. XANES measurements indicate that tetrachloroaurate ion transfers intact into the organic phase, with the central Au atom retaining its oxidation state of +3 and the overall anion remaining charged at −1.

Graphical abstract: Inhibited and enhanced nucleation of gold nanoparticles at the water|1,2-dichloroethane interface

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Publication details

The article was received on 12 May 2011, accepted on 04 Jul 2011 and first published on 26 Jul 2011


Article type: Paper
DOI: 10.1039/C1CP21536A
Citation: Phys. Chem. Chem. Phys., 2011,13, 15681-15689
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    Inhibited and enhanced nucleation of gold nanoparticles at the water|1,2-dichloroethane interface

    Y. Gründer, H. L. T. Ho, J. F. W. Mosselmans, S. L. M. Schroeder and R. A. W. Dryfe, Phys. Chem. Chem. Phys., 2011, 13, 15681
    DOI: 10.1039/C1CP21536A

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