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Effect of the Cleaning Step on the Morphology of Gold Nanoparticles

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Abstract

The synthesis of unsupported spherical gold nanoparticles was performed using the water-in-oil microemulsion method. The surfactant stabilizing the particles was removed when performing electrochemical characterization. This step was carried out using either acetone or centrifugation. We demonstrate that the shape of the nanoparticles is affected by the cleaning procedure, which leads to the increase of the nanoparticles anisotropy. The application of acetone as a cleaning solvent results in a complete agglomeration of the nanocrystallites, whereas centrifugation preserves most of the spherical particles. This observation is confirmed by UV–vis as well as TEM measurements. Cyclic voltammetry characterization was performed by underpotential deposition of Pb on Au surfaces for the different materials obtained and provided an insight into the orientations of the low indexes Miller planes.

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Authors and Affiliations

  1. Equipe E-lyse, Laboratoire de Catalyse en Chimie Organique (LACCO), UMR 6503 CNRS, Université de Poitiers, 4, rue Michel Brunet B27, 86022, Poitiers Cedex, France

    Teko Wilhelmin Napporn, Aurelien Habrioux, Julie Rousseau, Karine Servat, Jean-Michel Léger & Boniface K. Kokoh

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  1. Teko Wilhelmin Napporn
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  2. Aurelien Habrioux
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  3. Julie Rousseau
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  6. Boniface K. Kokoh
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Correspondence to Teko Wilhelmin Napporn.

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Napporn, T.W., Habrioux, A., Rousseau, J. et al. Effect of the Cleaning Step on the Morphology of Gold Nanoparticles. Electrocatal 2, 24–27 (2011). https://doi.org/10.1007/s12678-011-0037-2

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