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Spontaneous Oscillations During The Electrodeposition of Gold Thin Films

Published online by Cambridge University Press:  11 February 2011

Serge Ravaine ,
Raphaël Saliba ,
Christophe Mingotaud  and
Françoise Argoul
Serge Ravaine
Affiliation:
Centre de Recherche Paul Pascal, C.N.R.S., Avenue A. Schweitzer, F-33600 Pessac, France
Raphaël Saliba
Affiliation:
Centre de Recherche Paul Pascal, C.N.R.S., Avenue A. Schweitzer, F-33600 Pessac, France
Christophe Mingotaud
Affiliation:
Centre de Recherche Paul Pascal, C.N.R.S., Avenue A. Schweitzer, F-33600 Pessac, France
Françoise Argoul
Affiliation:
Centre de Recherche Paul Pascal, C.N.R.S., Avenue A. Schweitzer, F-33600 Pessac, France
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Abstract

The galvanostatic electrodeposition of two-dimensional (2D) gold films along the surface of aqueous hydrogen tetrachloroaurate solutions coated by a positively charged dimethyldioctadecylammonium (DODA) monolayer is reported. When a constant current is applied to the working electrode, a transition between two-dimensional (2D) growth and three-dimensional (3D) thickening of the deposits is observed. This event occurs when the current density is sufficiently small to allow the 3D process to consume all the injected electrical charges. The application of a current ramp with a rate such as the current density remains during the whole growth close to the limiting value separating the two growth regimes induces the appearance of spontaneous oscillations between the regimes of 2D and 3D growth. Deposits with a well-defined terraced structure are then obtained.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 749: Symposium W – Morphological and Compositional Evolution of Thin Films , 2002 , W15.5
Copyright
Copyright © Materials Research Society 2003

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References

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