NUCLEATION, GROWTH, AND MORPHOLOGICAL PROPERTIES OF ELECTRODEPOSITED NICKEL FILMS FROM DIFFERENT BATHS

A. Sahari (), A. Azizi, G. Schmerber and A. Dinia
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A. Sahari: Laboratoire d'Energétique et d'Electrochimie du Solide, Université de Sétif, 19000 Algérie, Algeria
A. Azizi: Laboratoire d'Energétique et d'Electrochimie du Solide, Université de Sétif, 19000 Algérie, Algeria
G. Schmerber: Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 du CNRS-ULP-ECPM, 23 rue du Loess, B. P. 43, 67034 Strasbourg Cedex 2, France
A. Dinia: Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 du CNRS-ULP-ECPM, 23 rue du Loess, B. P. 43, 67034 Strasbourg Cedex 2, France

Surface Review and Letters (SRL), 2008, vol. 15, issue 06, 717-725

Abstract: The processes of nickel electrodeposition onPt/Si(100)substrate from an aqueous sulfate, Watts, and chloride solution have been studied using electrochemical techniques and atomic force microscopy (AFM). It was found that hydrogen evolution reaction (HER) was shifted more cathodically and the nickel electrodeposition obeys to inhibition process, caused by adsorbed species in surface substrate. At early stage of the deposition chronoamperometric results were compared with Sharifker and Hills theoretical model. The nucleation was in agreement with progressive mode followed by 3D diffusion growth mechanism. The nucleation is generally slow at low over potentials, in all studied baths. AFM images show distribution nickel clusters, with different sizes.

Keywords: Deposition; diffusion; atomic force microscopy; growth (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1142/S0218625X08012165

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