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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Formato: | Articulo |
Lenguaje: | Inglés |
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1997
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/121493 |
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I19-R120-10915-121493 |
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institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
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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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Repositorios |
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1764820448343752704 |