Smoothening Mechanism of Thiourea on Silver Electrodeposition : Real Time Imaging of the Growth Front Evolution
Ag electrodeposits were grown on a polycrystalline Ag cathode at either 0.01 or 1 mA cm<sup>-2</sup> from aqueous 5 × 10<sup>-3</sup> M Ag<sub>2</sub>SO<sub>4</sub> + 10<sup>-2</sup> M H<sub>2</sub>SO<sub>4</sub> + 0...
Guardado en:
Autores principales: | , , , |
---|---|
Formato: | Articulo |
Lenguaje: | Inglés |
Publicado: |
1999
|
Materias: | |
Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/127440 https://pubs.acs.org/doi/abs/10.1021/la9806092 |
Aporte de: |
id |
I19-R120-10915-127440 |
---|---|
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 Interfaces Crystallization Diffusion Ions Electrodeposition |
spellingShingle |
Ciencias Exactas Química Interfaces Crystallization Diffusion Ions Electrodeposition Azzaroni, Omar Schilardi, Patricia Laura Salvarezza, Roberto Carlos Arvia, Alejandro Jorge Smoothening Mechanism of Thiourea on Silver Electrodeposition : Real Time Imaging of the Growth Front Evolution |
topic_facet |
Ciencias Exactas Química Interfaces Crystallization Diffusion Ions Electrodeposition |
description |
Ag electrodeposits were grown on a polycrystalline Ag cathode at either 0.01 or 1 mA cm<sup>-2</sup> from aqueous 5 × 10<sup>-3</sup> M Ag<sub>2</sub>SO<sub>4</sub> + 10<sup>-2</sup> M H<sub>2</sub>SO<sub>4</sub> + 0.5 M Na<sub>2</sub>SO<sub>4</sub>, in the absence and presence of different amounts of thiourea (TU). The cathode/solution interface evolution in a quasi-bidimensional electrochemical cell was followed with a video microscope imaging system. From TU-free solution a nodular morphology at 0.01 mA cm<sup>-2</sup> and a branched morphology at 1 mA cm<sup>-2</sup> were observed. At 0.01 mA cm<sup>-2</sup> the presence of TU drove the interface motion to a stable roughness regime by suppressing the nucleation and growth of instabilities. Accordingly, the characteristics of the growth front were consistent with the predictions of the Edwards−Wilkinson equation for the interface motion. At 1 mA cm<sup>-2</sup>, those electrodeposits grown in the presence of TU showed a decrease in both the nucleation and growth rates of instabilities, although they were not fully suppressed. |
format |
Articulo Articulo |
author |
Azzaroni, Omar Schilardi, Patricia Laura Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author_facet |
Azzaroni, Omar Schilardi, Patricia Laura Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author_sort |
Azzaroni, Omar |
title |
Smoothening Mechanism of Thiourea on Silver Electrodeposition : Real Time Imaging of the Growth Front Evolution |
title_short |
Smoothening Mechanism of Thiourea on Silver Electrodeposition : Real Time Imaging of the Growth Front Evolution |
title_full |
Smoothening Mechanism of Thiourea on Silver Electrodeposition : Real Time Imaging of the Growth Front Evolution |
title_fullStr |
Smoothening Mechanism of Thiourea on Silver Electrodeposition : Real Time Imaging of the Growth Front Evolution |
title_full_unstemmed |
Smoothening Mechanism of Thiourea on Silver Electrodeposition : Real Time Imaging of the Growth Front Evolution |
title_sort |
smoothening mechanism of thiourea on silver electrodeposition : real time imaging of the growth front evolution |
publishDate |
1999 |
url |
http://sedici.unlp.edu.ar/handle/10915/127440 https://pubs.acs.org/doi/abs/10.1021/la9806092 |
work_keys_str_mv |
AT azzaroniomar smootheningmechanismofthioureaonsilverelectrodepositionrealtimeimagingofthegrowthfrontevolution AT schilardipatricialaura smootheningmechanismofthioureaonsilverelectrodepositionrealtimeimagingofthegrowthfrontevolution AT salvarezzarobertocarlos smootheningmechanismofthioureaonsilverelectrodepositionrealtimeimagingofthegrowthfrontevolution AT arviaalejandrojorge smootheningmechanismofthioureaonsilverelectrodepositionrealtimeimagingofthegrowthfrontevolution |
bdutipo_str |
Repositorios |
_version_ |
1764820451705487362 |