Aqueous electrolytes confined within functionalized silica nanopores

Autores
Videla, Pablo Ernesto; Sala, Jons; Mart, Jordi; Gurdia, Elvira; Laria, Daniel Hector
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Molecular dynamics simulations have been carried out to investigate structural and dynamical characteristics of NaCl aqueous solutions confined within silica nanopores in contact with a bulk-like reservoir. Two types of pores, with diameters intermediate between 20 and 37.5 , were investigated: The first one corresponded to hydrophobic cavities, in which the prevailing wall-solution interactions were of the Lennard-Jones type. In addition, we also examined the behavior of solutions trapped within hydrophilic cavities, in which a set of unsaturated O-sites at the wall were transformed in polar silanol Si-OH groups. In all cases, the overall concentrations of the trapped electrolytes exhibited important reductions that, in the case of the narrowest pores, attained 50 of the bulk value. Local concentrations within the pores also showed important fluctuations. In hydrophobic cavities, the close vicinity of the pore wall was coated exclusively by the solvent, whereas in hydrophilic pores, selective adsorption of Na ions was also observed. Mass and charge transport were also investigated. Individual diffusion coefficients did not present large modifications from what is perceived in the bulk; contrasting, the electrical conductivity exhibited important reductions. The qualitative differences are rationalized in terms of simple geometrical considerations. © 2011 American Institute of Physics.
Fil: Videla, Pablo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
Fil: Sala, Jons. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
Fil: Mart, Jordi. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
Fil: Gurdia, Elvira. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
Fil: Laria, Daniel Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Comisión Nacional de Energía Atómica; Argentina
Materia
ELECTROLITES
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:11336/69483
Acceder
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spelling Aqueous electrolytes confined within functionalized silica nanoporesVidela, Pablo ErnestoSala, JonsMart, JordiGurdia, ElviraLaria, Daniel HectorELECTROLITEShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Molecular dynamics simulations have been carried out to investigate structural and dynamical characteristics of NaCl aqueous solutions confined within silica nanopores in contact with a bulk-like reservoir. Two types of pores, with diameters intermediate between 20 and 37.5 , were investigated: The first one corresponded to hydrophobic cavities, in which the prevailing wall-solution interactions were of the Lennard-Jones type. In addition, we also examined the behavior of solutions trapped within hydrophilic cavities, in which a set of unsaturated O-sites at the wall were transformed in polar silanol Si-OH groups. In all cases, the overall concentrations of the trapped electrolytes exhibited important reductions that, in the case of the narrowest pores, attained 50 of the bulk value. Local concentrations within the pores also showed important fluctuations. In hydrophobic cavities, the close vicinity of the pore wall was coated exclusively by the solvent, whereas in hydrophilic pores, selective adsorption of Na ions was also observed. Mass and charge transport were also investigated. Individual diffusion coefficients did not present large modifications from what is perceived in the bulk; contrasting, the electrical conductivity exhibited important reductions. The qualitative differences are rationalized in terms of simple geometrical considerations. © 2011 American Institute of Physics.Fil: Videla, Pablo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; ArgentinaFil: Sala, Jons. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; EspañaFil: Mart, Jordi. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; EspañaFil: Gurdia, Elvira. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; EspañaFil: Laria, Daniel Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Comisión Nacional de Energía Atómica; ArgentinaAmerican Institute of Physics2011-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/69483Videla, Pablo Ernesto; Sala, Jons; Mart, Jordi; Gurdia, Elvira; Laria, Daniel Hector; Aqueous electrolytes confined within functionalized silica nanopores; American Institute of Physics; Journal of Chemical Physics; 135; 10; 9-2011; 1-60021-9606CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.3632050info:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/10.1063/1.3632050info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:58:37Zoai:ri.conicet.gov.ar:11336/69483instacron: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 09:58:38.11CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Aqueous electrolytes confined within functionalized silica nanopores
title Aqueous electrolytes confined within functionalized silica nanopores
spellingShingle Aqueous electrolytes confined within functionalized silica nanopores
Videla, Pablo Ernesto
ELECTROLITES
title_short Aqueous electrolytes confined within functionalized silica nanopores
title_full Aqueous electrolytes confined within functionalized silica nanopores
title_fullStr Aqueous electrolytes confined within functionalized silica nanopores
title_full_unstemmed Aqueous electrolytes confined within functionalized silica nanopores
title_sort Aqueous electrolytes confined within functionalized silica nanopores
dc.creator.none.fl_str_mv Videla, Pablo Ernesto
Sala, Jons
Mart, Jordi
Gurdia, Elvira
Laria, Daniel Hector
author Videla, Pablo Ernesto
author_facet Videla, Pablo Ernesto
Sala, Jons
Mart, Jordi
Gurdia, Elvira
Laria, Daniel Hector
author_role author
author2 Sala, Jons
Mart, Jordi
Gurdia, Elvira
Laria, Daniel Hector
author2_role author
author
author
author
dc.subject.none.fl_str_mv ELECTROLITES
topic ELECTROLITES
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Molecular dynamics simulations have been carried out to investigate structural and dynamical characteristics of NaCl aqueous solutions confined within silica nanopores in contact with a bulk-like reservoir. Two types of pores, with diameters intermediate between 20 and 37.5 , were investigated: The first one corresponded to hydrophobic cavities, in which the prevailing wall-solution interactions were of the Lennard-Jones type. In addition, we also examined the behavior of solutions trapped within hydrophilic cavities, in which a set of unsaturated O-sites at the wall were transformed in polar silanol Si-OH groups. In all cases, the overall concentrations of the trapped electrolytes exhibited important reductions that, in the case of the narrowest pores, attained 50 of the bulk value. Local concentrations within the pores also showed important fluctuations. In hydrophobic cavities, the close vicinity of the pore wall was coated exclusively by the solvent, whereas in hydrophilic pores, selective adsorption of Na ions was also observed. Mass and charge transport were also investigated. Individual diffusion coefficients did not present large modifications from what is perceived in the bulk; contrasting, the electrical conductivity exhibited important reductions. The qualitative differences are rationalized in terms of simple geometrical considerations. © 2011 American Institute of Physics.
Fil: Videla, Pablo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
Fil: Sala, Jons. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
Fil: Mart, Jordi. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
Fil: Gurdia, Elvira. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
Fil: Laria, Daniel Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Comisión Nacional de Energía Atómica; Argentina
description Molecular dynamics simulations have been carried out to investigate structural and dynamical characteristics of NaCl aqueous solutions confined within silica nanopores in contact with a bulk-like reservoir. Two types of pores, with diameters intermediate between 20 and 37.5 , were investigated: The first one corresponded to hydrophobic cavities, in which the prevailing wall-solution interactions were of the Lennard-Jones type. In addition, we also examined the behavior of solutions trapped within hydrophilic cavities, in which a set of unsaturated O-sites at the wall were transformed in polar silanol Si-OH groups. In all cases, the overall concentrations of the trapped electrolytes exhibited important reductions that, in the case of the narrowest pores, attained 50 of the bulk value. Local concentrations within the pores also showed important fluctuations. In hydrophobic cavities, the close vicinity of the pore wall was coated exclusively by the solvent, whereas in hydrophilic pores, selective adsorption of Na ions was also observed. Mass and charge transport were also investigated. Individual diffusion coefficients did not present large modifications from what is perceived in the bulk; contrasting, the electrical conductivity exhibited important reductions. The qualitative differences are rationalized in terms of simple geometrical considerations. © 2011 American Institute of Physics.
publishDate 2011
dc.date.none.fl_str_mv 2011-09
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/11336/69483
Videla, Pablo Ernesto; Sala, Jons; Mart, Jordi; Gurdia, Elvira; Laria, Daniel Hector; Aqueous electrolytes confined within functionalized silica nanopores; American Institute of Physics; Journal of Chemical Physics; 135; 10; 9-2011; 1-6
0021-9606
CONICET Digital
CONICET
url http://hdl.handle.net/11336/69483
identifier_str_mv Videla, Pablo Ernesto; Sala, Jons; Mart, Jordi; Gurdia, Elvira; Laria, Daniel Hector; Aqueous electrolytes confined within functionalized silica nanopores; American Institute of Physics; Journal of Chemical Physics; 135; 10; 9-2011; 1-6
0021-9606
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1063/1.3632050
info:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/10.1063/1.3632050
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
application/pdf
dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
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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