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Titre du document / Document title

Homogeneous calcium carbonate coating obtained by electrodeposition : in situ atomic force microscope observations

Auteur(s) / Author(s)

PAVEZ Jorge (1) ; SILVA Juan F. (1) ; MELO Francisco (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Departamento de Física, Universidad de Santiago de Chile and Center for Advanced Interdisciplinary Research in Materials, CIMAT Casilla 307, Correo 2, Santiago, CHILI

Résumé / Abstract

The evolution of the first stages of the crystallization of an electrochemically deposited calcium carbonate on indium tin oxide (ITO) electrode has been investigated. The electrodeposition was driven applying a constant negative potential to a NaHCO3 and CaCl2 solution saturated with molecular oxygen. By this way, novel data about the kinetics of the crystal growth of CaCO3 were collected from the AFM images. The results show that at the solution supersaturation levels used, the crystal growth occurred by a uniform surface nucleation mechanism. During the growth of the initial nuclei, the surface of the electrode was covered progressively by the growth of flat multilayers having triangular faces. The height of these structures ranged from one to several molecular layers of calcium carbonate. At the end of the crystallization process, the roughness of the electrode surface is reduced in average to two monolayers. Thus, our method provides a useful way to electrodeposit a nearly uniform layer of calcium carbonate on a variety of surfaces of potential applications.

Revue / Journal Title

Electrochimica acta    ISSN  0013-4686   CODEN ELCAAV 

Source / Source

2005, vol. 50, no16-17, pp. 3488-3494 [7 page(s) (article)] (30 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Kidlington, ROYAUME-UNI  (1959) (Revue)

Mots-clés anglais / English Keywords

Morphology

;

Surface structure

;

Electrochemical reaction

;

X ray diffraction

;

Basic solution

;

Reaction mechanism

;

Calcite

;

Atomic force microscopy

;

In situ

;

Calcium Chlorides

;

Electrodeposition

;

Sodium Hydrogencarbonates

;

Calcium carbonate

;

Indium tin oxide electrode

;

Experimental study

;

Mots-clés français / French Keywords

Morphologie

;

Structure surface

;

Réaction électrochimique

;

Diffraction RX

;

Solution basique

;

Mécanisme réaction

;

Calcite

;

Microscopie force atomique

;

In situ

;

Calcium Chlorure

;

Dépôt électrolytique

;

Sodium Hydrogénocarbonate

;

Calcium carbonate

;

Electrode ITO

;

Etude expérimentale

;

Mots-clés espagnols / Spanish Keywords

Morfología

;

Estructura superficie

;

Reacción electroquímica

;

Difracción RX

;

Solución básica

;

Mecanismo reacción

;

Calcita

;

Microscopía fuerza atómica

;

In situ

;

Calcio Cloruro

;

Depósito electrolítico

;

Sodio Hidrógenocarbonato

;

Calcio carbonato

;

Electrodo ITO

;

Estudio experimental

;

Mots-clés d'auteur / Author Keywords

Calcium carbonate

;

Calcite

;

Electrodeposition

;

Atomic force microscopy

;

Localisation / Location

INIST-CNRS, Cote INIST : 1516, 35400012463973.0360

Nº notice refdoc (ud4) : 16795275



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