Raspberry-like Gold Microspheres: Preparation and Electrochemical Characterization


  • The authors thank Eric Lebraud (Institut de Chimie de la Matière Condensée de Bordeaux) for the XRD experiments. Z. H. Li is grateful to the University of Bordeaux 1 for a postdoctoral fellowship.


A straightforward method to synthesize quasi-monodisperse gold microspheres from a commercial gold plating solution is reported. The size and the surface roughness of the obtained particles can easily be tuned. In particular, raspberry-like particles with a high active surface area are obtained. The microspheres are assembled on indium tin oxide (ITO) electrodes using the layer-by-layer technique and the overall electroactive surface area is increased, as characterized by cyclic voltammetry. The as-prepared products were characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), cyclic voltammetry, and light microscopy.