Ellipsometric changes produced by oxidation—reduction potential cycles applied to cadmium in sodium hydroxide solutions

Ellipsometry data obtained for the Cd-NaOH solution interface under the influence of potential cycles in the potential window where the Cd(OH)<sub>2</sub>-CdO layer can be electroformed and electroreduced, are particularly sensitive to both the layer thickness and the upper electroformat...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Zerbino, Jorge Omar, Saidman, S. B., Vilche, Jorge Roberto, Arvia, Alejandro Jorge
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	1990
Materias:	Ciencias Exactas Química Oxidation Cadmium Sodium hydroxide solutions
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/120682 https://www.sciencedirect.com/science/article/abs/pii/0013468690870524
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-120682
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 Oxidation Cadmium Sodium hydroxide solutions
spellingShingle	Ciencias Exactas Química Oxidation Cadmium Sodium hydroxide solutions Zerbino, Jorge Omar Saidman, S. B. Vilche, Jorge Roberto Arvia, Alejandro Jorge Ellipsometric changes produced by oxidation—reduction potential cycles applied to cadmium in sodium hydroxide solutions
topic_facet	Ciencias Exactas Química Oxidation Cadmium Sodium hydroxide solutions
description	Ellipsometry data obtained for the Cd-NaOH solution interface under the influence of potential cycles in the potential window where the Cd(OH)<sub>2</sub>-CdO layer can be electroformed and electroreduced, are particularly sensitive to both the layer thickness and the upper electroformation potential limit. The best fitting of the experimental results is obtained for two limiting situations. For thin anodic layers (d ⩽ 6 nm) the ellipsometric data fit the equation ñ=1.55−i 0.005, whereas for relatively thicker anodic layers (d > 7 nm) data can be adjusted through the equation ñ=2.6−i 0.10. These equations are consistent with the electroformation of a hydrous cadmium oxide layer at low potentials, and a cadmium oxide layer with a lower water content which grows beneath the former one at high potentials. Otherwise, the electroreduction of the anodic oxide layer yields a cadmium overlayer which exhibits a shift of the corresponding ellipsometric data as compared to the starting cadmium surface. This shift is presumably related to the development of different metal surface textures resulting from the different electroreduction conditions.
format	Articulo Articulo
author	Zerbino, Jorge Omar Saidman, S. B. Vilche, Jorge Roberto Arvia, Alejandro Jorge
author_facet	Zerbino, Jorge Omar Saidman, S. B. Vilche, Jorge Roberto Arvia, Alejandro Jorge
author_sort	Zerbino, Jorge Omar
title	Ellipsometric changes produced by oxidation—reduction potential cycles applied to cadmium in sodium hydroxide solutions
title_short	Ellipsometric changes produced by oxidation—reduction potential cycles applied to cadmium in sodium hydroxide solutions
title_full	Ellipsometric changes produced by oxidation—reduction potential cycles applied to cadmium in sodium hydroxide solutions
title_fullStr	Ellipsometric changes produced by oxidation—reduction potential cycles applied to cadmium in sodium hydroxide solutions
title_full_unstemmed	Ellipsometric changes produced by oxidation—reduction potential cycles applied to cadmium in sodium hydroxide solutions
title_sort	ellipsometric changes produced by oxidation—reduction potential cycles applied to cadmium in sodium hydroxide solutions
publishDate	1990
url	http://sedici.unlp.edu.ar/handle/10915/120682 https://www.sciencedirect.com/science/article/abs/pii/0013468690870524
work_keys_str_mv	AT zerbinojorgeomar ellipsometricchangesproducedbyoxidationreductionpotentialcyclesappliedtocadmiuminsodiumhydroxidesolutions AT saidmansb ellipsometricchangesproducedbyoxidationreductionpotentialcyclesappliedtocadmiuminsodiumhydroxidesolutions AT vilchejorgeroberto ellipsometricchangesproducedbyoxidationreductionpotentialcyclesappliedtocadmiuminsodiumhydroxidesolutions AT arviaalejandrojorge ellipsometricchangesproducedbyoxidationreductionpotentialcyclesappliedtocadmiuminsodiumhydroxidesolutions
bdutipo_str	Repositorios
_version_	1764820448037568512

Ellipsometric changes produced by oxidation—reduction potential cycles applied to cadmium in sodium hydroxide solutions

Ejemplares similares