Abstract
Gold nanoparticles (AuNPs) of less than 50 nm diameter were electrodeposited from cyanide solution by pulsating electric current on modified copper and indium tin oxide (ITO) films coated on glass. Morphology, size, and composition of the deposited AuNPs were studied by X-ray photoelectron spectroscopy, atomic force microscopy, and field emission scanning electron microscopy. Effects of peak current density, pulse frequency, potassium iodide and cysteine on grain size, and morphology of the AuNPs were determined. Experiments showed that cathode current efficiency increases with the pulse frequency and the iodide ion. Size of the AuNPs increased with the current density. The number of nucleation sites was larger on ITO than on Cu layer; while the average diameter of the crystallites on ITO was smaller than on Cu layer.
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Acknowledgments
The authors would like to acknowledge R. Siavash Moakhar for assistance with fabrication of AuNPs-ITO electrodes.
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Manuscript submitted August 19, 2013.
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Vahdatkhah, P., Sadrnezhaad, S.K. Influence of Substrate, Additives, and Pulse Parameters on Electrodeposition of Gold Nanoparticles from Potassium Dicyanoaurate. Metall Mater Trans B 46, 2584–2592 (2015). https://doi.org/10.1007/s11663-015-0427-6
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DOI: https://doi.org/10.1007/s11663-015-0427-6