Alloy formation in the system Au(1 1 1)/Cd during the UPD process

Autores
del Barrio, Maria Cecilia; Garcia, Silvana Graciela; Salinas, Daniel Ricardo
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Au-Cd alloy formation in the course of Cd underpotential deposition (UPD) in the system Au(111)/Cd2+, SO42- has been studied by conventional electrochemical techniques and in situ STM. The long time polarization experiments and the current-potential desorption spectra have indicated that the alloy can be formed at relatively high underpotentials with the formation of 2D Cd islands as was observed by in situ STM images. These islands grow and coalesce at a constant potential with the subsequent formation of new 2D islands on top of the partially formed first Cd monolayer. Atomically resolved images of these islands have revealed an hexagonal atomic structure with an interatomic distance of 0.29±0.01 nm. The dissolution of these features occurs together with the formation of many holes of monatomic height which induces a surface roughening. The alloy formation is explained considering a place exchange process between the Au atoms and the adsorbed Cd atoms followed by solid state diffusion of these atoms through the alloyed phase.
Fil: del Barrio, Maria Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentina
Fil: Garcia, Silvana Graciela. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentina
Fil: Salinas, Daniel Ricardo. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentina
Materia
ALLOY FORMATION
AU(1 1 1)
CD UPD
IN SITU STM
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/98102
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/98102
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Alloy formation in the system Au(1 1 1)/Cd during the UPD processdel Barrio, Maria CeciliaGarcia, Silvana GracielaSalinas, Daniel RicardoALLOY FORMATIONAU(1 1 1)CD UPDIN SITU STMhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The Au-Cd alloy formation in the course of Cd underpotential deposition (UPD) in the system Au(111)/Cd2+, SO42- has been studied by conventional electrochemical techniques and in situ STM. The long time polarization experiments and the current-potential desorption spectra have indicated that the alloy can be formed at relatively high underpotentials with the formation of 2D Cd islands as was observed by in situ STM images. These islands grow and coalesce at a constant potential with the subsequent formation of new 2D islands on top of the partially formed first Cd monolayer. Atomically resolved images of these islands have revealed an hexagonal atomic structure with an interatomic distance of 0.29±0.01 nm. The dissolution of these features occurs together with the formation of many holes of monatomic height which induces a surface roughening. The alloy formation is explained considering a place exchange process between the Au atoms and the adsorbed Cd atoms followed by solid state diffusion of these atoms through the alloyed phase.Fil: del Barrio, Maria Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; ArgentinaFil: Garcia, Silvana Graciela. Universidad Nacional del Sur. Departamento de Ingeniería Química; ArgentinaFil: Salinas, Daniel Ricardo. Universidad Nacional del Sur. Departamento de Ingeniería Química; ArgentinaElsevier Science Inc2004-08-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/98102del Barrio, Maria Cecilia; Garcia, Silvana Graciela; Salinas, Daniel Ricardo; Alloy formation in the system Au(1 1 1)/Cd during the UPD process; Elsevier Science Inc; Electrochemistry Communications; 6; 8; 17-8-2004; 762-7661388-2481CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1388248104001304info:eu-repo/semantics/altIdentifier/doi/10.1016/j.elecom.2004.05.022info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:10:42Zoai:ri.conicet.gov.ar:11336/98102instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:10:43.113CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Alloy formation in the system Au(1 1 1)/Cd during the UPD process
title Alloy formation in the system Au(1 1 1)/Cd during the UPD process
spellingShingle Alloy formation in the system Au(1 1 1)/Cd during the UPD process
del Barrio, Maria Cecilia
ALLOY FORMATION
AU(1 1 1)
CD UPD
IN SITU STM
title_short Alloy formation in the system Au(1 1 1)/Cd during the UPD process
title_full Alloy formation in the system Au(1 1 1)/Cd during the UPD process
title_fullStr Alloy formation in the system Au(1 1 1)/Cd during the UPD process
title_full_unstemmed Alloy formation in the system Au(1 1 1)/Cd during the UPD process
title_sort Alloy formation in the system Au(1 1 1)/Cd during the UPD process
dc.creator.none.fl_str_mv del Barrio, Maria Cecilia
Garcia, Silvana Graciela
Salinas, Daniel Ricardo
author del Barrio, Maria Cecilia
author_facet del Barrio, Maria Cecilia
Garcia, Silvana Graciela
Salinas, Daniel Ricardo
author_role author
author2 Garcia, Silvana Graciela
Salinas, Daniel Ricardo
author2_role author
author
dc.subject.none.fl_str_mv ALLOY FORMATION
AU(1 1 1)
CD UPD
IN SITU STM
topic ALLOY FORMATION
AU(1 1 1)
CD UPD
IN SITU STM
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The Au-Cd alloy formation in the course of Cd underpotential deposition (UPD) in the system Au(111)/Cd2+, SO42- has been studied by conventional electrochemical techniques and in situ STM. The long time polarization experiments and the current-potential desorption spectra have indicated that the alloy can be formed at relatively high underpotentials with the formation of 2D Cd islands as was observed by in situ STM images. These islands grow and coalesce at a constant potential with the subsequent formation of new 2D islands on top of the partially formed first Cd monolayer. Atomically resolved images of these islands have revealed an hexagonal atomic structure with an interatomic distance of 0.29±0.01 nm. The dissolution of these features occurs together with the formation of many holes of monatomic height which induces a surface roughening. The alloy formation is explained considering a place exchange process between the Au atoms and the adsorbed Cd atoms followed by solid state diffusion of these atoms through the alloyed phase.
Fil: del Barrio, Maria Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentina
Fil: Garcia, Silvana Graciela. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentina
Fil: Salinas, Daniel Ricardo. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentina
description The Au-Cd alloy formation in the course of Cd underpotential deposition (UPD) in the system Au(111)/Cd2+, SO42- has been studied by conventional electrochemical techniques and in situ STM. The long time polarization experiments and the current-potential desorption spectra have indicated that the alloy can be formed at relatively high underpotentials with the formation of 2D Cd islands as was observed by in situ STM images. These islands grow and coalesce at a constant potential with the subsequent formation of new 2D islands on top of the partially formed first Cd monolayer. Atomically resolved images of these islands have revealed an hexagonal atomic structure with an interatomic distance of 0.29±0.01 nm. The dissolution of these features occurs together with the formation of many holes of monatomic height which induces a surface roughening. The alloy formation is explained considering a place exchange process between the Au atoms and the adsorbed Cd atoms followed by solid state diffusion of these atoms through the alloyed phase.
publishDate 2004
dc.date.none.fl_str_mv 2004-08-17
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/98102
del Barrio, Maria Cecilia; Garcia, Silvana Graciela; Salinas, Daniel Ricardo; Alloy formation in the system Au(1 1 1)/Cd during the UPD process; Elsevier Science Inc; Electrochemistry Communications; 6; 8; 17-8-2004; 762-766
1388-2481
CONICET Digital
CONICET
url http://hdl.handle.net/11336/98102
identifier_str_mv del Barrio, Maria Cecilia; Garcia, Silvana Graciela; Salinas, Daniel Ricardo; Alloy formation in the system Au(1 1 1)/Cd during the UPD process; Elsevier Science Inc; Electrochemistry Communications; 6; 8; 17-8-2004; 762-766
1388-2481
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1388248104001304
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.elecom.2004.05.022
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Inc
publisher.none.fl_str_mv Elsevier Science Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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