Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface

Autores
López García, José Juan; Aranda Rascón, M. J.; Grosse, Constantino; Horno, J.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A study of the equilibrium double layer surrounding charged spherical particles is presented, considering that ions in the suspending medium have a finite size. It is assumed that each ionic species has a different minimum approach distance to the particle surface, while the distance of minimum approach between ions in the bulk has the same value for all ion species. Numerical calculations made using the network simulation method and including all the features of the considered model are presented, together with rigorous analytical results valid for a flat interface and point ions in the bulk electrolyte solution. It is shown that the double-layer parameters are very sensitive to the difference between the minimum approach distances of co-ions and counterions. For negative particles and greater approach distances for co-ions than for counterions, the potential always increases with this difference and, under appropriate circumstances, attains positive values leading to charge reversal. This phenomenon is favored by a high electrolyte concentration, high counterion valences, and low surface charge (in modulus). An analytical expression relating these parameters to the threshold value of the difference between the minimum approach distances of co-ions and counterions to the particle surface is presented.
Fil: López García, José Juan. Universidad de Jaén; España
Fil: Aranda Rascón, M. J.. Universidad de Jaén; España
Fil: Grosse, Constantino. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; Argentina
Fil: Horno, J.. Universidad de Jaén; España
Materia
Equilibrium Double Layer
Finite Ion Size
Charge Reversal
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/72490
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/72490
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surfaceLópez García, José JuanAranda Rascón, M. J.Grosse, ConstantinoHorno, J.Equilibrium Double LayerFinite Ion SizeCharge Reversalhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A study of the equilibrium double layer surrounding charged spherical particles is presented, considering that ions in the suspending medium have a finite size. It is assumed that each ionic species has a different minimum approach distance to the particle surface, while the distance of minimum approach between ions in the bulk has the same value for all ion species. Numerical calculations made using the network simulation method and including all the features of the considered model are presented, together with rigorous analytical results valid for a flat interface and point ions in the bulk electrolyte solution. It is shown that the double-layer parameters are very sensitive to the difference between the minimum approach distances of co-ions and counterions. For negative particles and greater approach distances for co-ions than for counterions, the potential always increases with this difference and, under appropriate circumstances, attains positive values leading to charge reversal. This phenomenon is favored by a high electrolyte concentration, high counterion valences, and low surface charge (in modulus). An analytical expression relating these parameters to the threshold value of the difference between the minimum approach distances of co-ions and counterions to the particle surface is presented.Fil: López García, José Juan. Universidad de Jaén; EspañaFil: Aranda Rascón, M. J.. Universidad de Jaén; EspañaFil: Grosse, Constantino. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; ArgentinaFil: Horno, J.. Universidad de Jaén; EspañaAmerican Chemical Society2010-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/72490López García, José Juan; Aranda Rascón, M. J.; Grosse, Constantino; Horno, J.; Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface; American Chemical Society; Journal of Physical Chemistry B; 114; 22; 6-2010; 7548-75561520-6106CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/jp9122369info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp9122369info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:42:38Zoai:ri.conicet.gov.ar:11336/72490instacron: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:34982025-10-15 15:42:38.861CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface
title Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface
spellingShingle Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface
López García, José Juan
Equilibrium Double Layer
Finite Ion Size
Charge Reversal
title_short Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface
title_full Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface
title_fullStr Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface
title_full_unstemmed Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface
title_sort Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface
dc.creator.none.fl_str_mv López García, José Juan
Aranda Rascón, M. J.
Grosse, Constantino
Horno, J.
author López García, José Juan
author_facet López García, José Juan
Aranda Rascón, M. J.
Grosse, Constantino
Horno, J.
author_role author
author2 Aranda Rascón, M. J.
Grosse, Constantino
Horno, J.
author2_role author
author
author
dc.subject.none.fl_str_mv Equilibrium Double Layer
Finite Ion Size
Charge Reversal
topic Equilibrium Double Layer
Finite Ion Size
Charge Reversal
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A study of the equilibrium double layer surrounding charged spherical particles is presented, considering that ions in the suspending medium have a finite size. It is assumed that each ionic species has a different minimum approach distance to the particle surface, while the distance of minimum approach between ions in the bulk has the same value for all ion species. Numerical calculations made using the network simulation method and including all the features of the considered model are presented, together with rigorous analytical results valid for a flat interface and point ions in the bulk electrolyte solution. It is shown that the double-layer parameters are very sensitive to the difference between the minimum approach distances of co-ions and counterions. For negative particles and greater approach distances for co-ions than for counterions, the potential always increases with this difference and, under appropriate circumstances, attains positive values leading to charge reversal. This phenomenon is favored by a high electrolyte concentration, high counterion valences, and low surface charge (in modulus). An analytical expression relating these parameters to the threshold value of the difference between the minimum approach distances of co-ions and counterions to the particle surface is presented.
Fil: López García, José Juan. Universidad de Jaén; España
Fil: Aranda Rascón, M. J.. Universidad de Jaén; España
Fil: Grosse, Constantino. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; Argentina
Fil: Horno, J.. Universidad de Jaén; España
description A study of the equilibrium double layer surrounding charged spherical particles is presented, considering that ions in the suspending medium have a finite size. It is assumed that each ionic species has a different minimum approach distance to the particle surface, while the distance of minimum approach between ions in the bulk has the same value for all ion species. Numerical calculations made using the network simulation method and including all the features of the considered model are presented, together with rigorous analytical results valid for a flat interface and point ions in the bulk electrolyte solution. It is shown that the double-layer parameters are very sensitive to the difference between the minimum approach distances of co-ions and counterions. For negative particles and greater approach distances for co-ions than for counterions, the potential always increases with this difference and, under appropriate circumstances, attains positive values leading to charge reversal. This phenomenon is favored by a high electrolyte concentration, high counterion valences, and low surface charge (in modulus). An analytical expression relating these parameters to the threshold value of the difference between the minimum approach distances of co-ions and counterions to the particle surface is presented.
publishDate 2010
dc.date.none.fl_str_mv 2010-06
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/11336/72490
López García, José Juan; Aranda Rascón, M. J.; Grosse, Constantino; Horno, J.; Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface; American Chemical Society; Journal of Physical Chemistry B; 114; 22; 6-2010; 7548-7556
1520-6106
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72490
identifier_str_mv López García, José Juan; Aranda Rascón, M. J.; Grosse, Constantino; Horno, J.; Equilibrium electric double layer of charged spherical colloidal particles: Effect of different distances of minimum ion approach to the particle surface; American Chemical Society; Journal of Physical Chemistry B; 114; 22; 6-2010; 7548-7556
1520-6106
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/jp9122369
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp9122369
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
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
_version_ 1846083534299594752
score 13.22299

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