Kinetics and growth modes of quasi-2d silver branched electrodeposits produced in the presence of a supporting electrolyte

Quasi-2d silver electrodeposits were grown electrochemically at constant potential from aqueous Ag+ ion-containing solutions in the presence of a supporting electrolyte, at room temperature, using a three-electrode quasi-2d circular electrochemical cell. Open branching and dense radial branching pat...

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Autores principales: Schilardi, P. L., Marchiano, S. L., Salvarezza, Roberto Carlos, Hernández Creus, A., Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1997
Materias:
Ciencias Exactas
Química
Silver
Electrodeposits
Kinetics
Growth
Supporting electrolyte
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/121493
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-121493
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Silver
Electrodeposits
Kinetics
Growth
Supporting electrolyte
spellingShingle Ciencias Exactas
Química
Silver
Electrodeposits
Kinetics
Growth
Supporting electrolyte
Schilardi, P. L.
Marchiano, S. L.
Salvarezza, Roberto Carlos
Hernández Creus, A.
Arvia, Alejandro Jorge
Kinetics and growth modes of quasi-2d silver branched electrodeposits produced in the presence of a supporting electrolyte
topic_facet Ciencias Exactas
Química
Silver
Electrodeposits
Kinetics
Growth
Supporting electrolyte
description Quasi-2d silver electrodeposits were grown electrochemically at constant potential from aqueous Ag+ ion-containing solutions in the presence of a supporting electrolyte, at room temperature, using a three-electrode quasi-2d circular electrochemical cell. Open branching and dense radial branching patterns were distinguished on the centimetre scale, and growth mode transitions could be observed during the process. Branching patterns exhibited a mass fractal behaviour with a mass fractal dimension increasing from that expected for a DLA-like pattern to that of a dense branching pattern as either the cathodic overpotential (ηc) or the Ag+ ion concentration in the solution (c) was increased. The electrodeposition current increased with time exhibiting different regimes depending on whether an open branching or a dense radial branching growth mode prevailed. When the electrodeposition time exceeded a certain critical value, the radial growth rate of electrodeposits (vr) approached a vr α ηcc relationship. The experimental morphologies and growth kinetics were reproduced by Monte Carlo simulations of a growth model in which depositing particles follow a biased random walk.
format Articulo
Articulo
author Schilardi, P. L.
Marchiano, S. L.
Salvarezza, Roberto Carlos
Hernández Creus, A.
Arvia, Alejandro Jorge
author_facet Schilardi, P. L.
Marchiano, S. L.
Salvarezza, Roberto Carlos
Hernández Creus, A.
Arvia, Alejandro Jorge
author_sort Schilardi, P. L.
title Kinetics and growth modes of quasi-2d silver branched electrodeposits produced in the presence of a supporting electrolyte
title_short Kinetics and growth modes of quasi-2d silver branched electrodeposits produced in the presence of a supporting electrolyte
title_full Kinetics and growth modes of quasi-2d silver branched electrodeposits produced in the presence of a supporting electrolyte
title_fullStr Kinetics and growth modes of quasi-2d silver branched electrodeposits produced in the presence of a supporting electrolyte
title_full_unstemmed Kinetics and growth modes of quasi-2d silver branched electrodeposits produced in the presence of a supporting electrolyte
title_sort kinetics and growth modes of quasi-2d silver branched electrodeposits produced in the presence of a supporting electrolyte
publishDate 1997
url http://sedici.unlp.edu.ar/handle/10915/121493
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