Manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes

The design of hybrid mesoporous materials incorporating polymeric assemblies as versatile functional units has become a very fertile research area offering major opportunities for controlling molecular transport through interfaces. However, the creation of such functional materials depends criticall...

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Autores principales:	Williams, Federico Jose, Soler Illia, Galo Juan de Avila Arturo
Publicado:	2011
Materias:	Anionic species Charge reversal Electrostatic assembly Experimental techniques Functional properties Functional units Hybrid architectures Inorganic hybrids Interfacial architecture Meso-pores Mesochannels Mesopore Mesoporous silica film Mesoporous silica thin films Mesoporous thin films Mesoporous walls Molecular design Molecular transport Molecular transport properties Nanoconfinement effects Planar silica Polyallylamine Polymeric assemblies Porosimetry Research areas Cyclic voltammetry Dyes Electrostatics Functional materials Functional polymers Hybrid materials Polyelectrolytes Polymer films Polymers Seepage Silica Soil mechanics Thin films Transport properties Walls (structural partitions) X ray photoelectron spectroscopy Mesoporous materials electrolyte nanomaterial polymer silicon dioxide article artificial membrane chemistry permeability porosity Electrolytes Membranes, Artificial Nanostructures Permeability Porosity Silicon Dioxide
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v27_n8_p4328_Brunsen http://hdl.handle.net/20.500.12110/paper_07437463_v27_n8_p4328_Brunsen
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_07437463_v27_n8_p4328_Brunsen
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spelling	paper:paper_07437463_v27_n8_p4328_Brunsen2023-06-08T15:45:00Z Manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes Williams, Federico Jose Soler Illia, Galo Juan de Avila Arturo Anionic species Charge reversal Electrostatic assembly Experimental techniques Functional properties Functional units Hybrid architectures Inorganic hybrids Interfacial architecture Meso-pores Mesochannels Mesopore Mesoporous silica film Mesoporous silica thin films Mesoporous thin films Mesoporous walls Molecular design Molecular transport Molecular transport properties Nanoconfinement effects Planar silica Polyallylamine Polymeric assemblies Porosimetry Research areas Cyclic voltammetry Dyes Electrostatics Functional materials Functional polymers Hybrid materials Polyelectrolytes Polymer films Polymers Seepage Silica Soil mechanics Thin films Transport properties Walls (structural partitions) X ray photoelectron spectroscopy Mesoporous materials electrolyte nanomaterial polymer silicon dioxide article artificial membrane chemistry permeability porosity Electrolytes Membranes, Artificial Nanostructures Permeability Polymers Porosity Silicon Dioxide The design of hybrid mesoporous materials incorporating polymeric assemblies as versatile functional units has become a very fertile research area offering major opportunities for controlling molecular transport through interfaces. However, the creation of such functional materials depends critically on our ability to assemble polymeric units in a predictable manner within mesopores with dimensions comparable to the size of the macromolecular blocks themselves. In this work, we describe for the first time the manipulation of the molecular transport properties of mesoporous silica thin films by the direct infiltration of polyelectrolytes into the inner environment of the 3D porous framework. The hybrid architectures were built up through the infiltration-electrostatic assembly of polyallylamine (PAH) on the mesopore silica walls, and the resulting systems were studied by a combination of experimental techniques including ellipso-porosimetry, cyclic voltammetry and X-ray photoelectron spectroscopy, among others. Our results show that the infiltration-assembly of PAH alters the intrinsic cation-permselective properties of mesoporous silica films, rendering them ion-permeable mesochannels and enabling the unrestricted diffusion of cationic and anionic species through the hybrid interfacial architecture. Contrary to what happens during the electrostatic assembly of PAH on planar silica films (quantitative charge reversal), the surface charge of the mesoporous walls is completely neutralized upon assembling the cationic PAH layer (i.e., no charge reversal occurs). We consider this work to have profound implications not only on the molecular design of multifunctional mesoporous thin films but also on understanding the predominant role of nanoconfinement effects in dictating the functional properties of polymer-inorganic hybrid nanomaterials. © 2011 American Chemical Society. Fil:Williams, F.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Soler-Illia, G.J.A.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v27_n8_p4328_Brunsen http://hdl.handle.net/20.500.12110/paper_07437463_v27_n8_p4328_Brunsen
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Anionic species Charge reversal Electrostatic assembly Experimental techniques Functional properties Functional units Hybrid architectures Inorganic hybrids Interfacial architecture Meso-pores Mesochannels Mesopore Mesoporous silica film Mesoporous silica thin films Mesoporous thin films Mesoporous walls Molecular design Molecular transport Molecular transport properties Nanoconfinement effects Planar silica Polyallylamine Polymeric assemblies Porosimetry Research areas Cyclic voltammetry Dyes Electrostatics Functional materials Functional polymers Hybrid materials Polyelectrolytes Polymer films Polymers Seepage Silica Soil mechanics Thin films Transport properties Walls (structural partitions) X ray photoelectron spectroscopy Mesoporous materials electrolyte nanomaterial polymer silicon dioxide article artificial membrane chemistry permeability porosity Electrolytes Membranes, Artificial Nanostructures Permeability Polymers Porosity Silicon Dioxide
spellingShingle	Anionic species Charge reversal Electrostatic assembly Experimental techniques Functional properties Functional units Hybrid architectures Inorganic hybrids Interfacial architecture Meso-pores Mesochannels Mesopore Mesoporous silica film Mesoporous silica thin films Mesoporous thin films Mesoporous walls Molecular design Molecular transport Molecular transport properties Nanoconfinement effects Planar silica Polyallylamine Polymeric assemblies Porosimetry Research areas Cyclic voltammetry Dyes Electrostatics Functional materials Functional polymers Hybrid materials Polyelectrolytes Polymer films Polymers Seepage Silica Soil mechanics Thin films Transport properties Walls (structural partitions) X ray photoelectron spectroscopy Mesoporous materials electrolyte nanomaterial polymer silicon dioxide article artificial membrane chemistry permeability porosity Electrolytes Membranes, Artificial Nanostructures Permeability Polymers Porosity Silicon Dioxide Williams, Federico Jose Soler Illia, Galo Juan de Avila Arturo Manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes
topic_facet	Anionic species Charge reversal Electrostatic assembly Experimental techniques Functional properties Functional units Hybrid architectures Inorganic hybrids Interfacial architecture Meso-pores Mesochannels Mesopore Mesoporous silica film Mesoporous silica thin films Mesoporous thin films Mesoporous walls Molecular design Molecular transport Molecular transport properties Nanoconfinement effects Planar silica Polyallylamine Polymeric assemblies Porosimetry Research areas Cyclic voltammetry Dyes Electrostatics Functional materials Functional polymers Hybrid materials Polyelectrolytes Polymer films Polymers Seepage Silica Soil mechanics Thin films Transport properties Walls (structural partitions) X ray photoelectron spectroscopy Mesoporous materials electrolyte nanomaterial polymer silicon dioxide article artificial membrane chemistry permeability porosity Electrolytes Membranes, Artificial Nanostructures Permeability Polymers Porosity Silicon Dioxide
description	The design of hybrid mesoporous materials incorporating polymeric assemblies as versatile functional units has become a very fertile research area offering major opportunities for controlling molecular transport through interfaces. However, the creation of such functional materials depends critically on our ability to assemble polymeric units in a predictable manner within mesopores with dimensions comparable to the size of the macromolecular blocks themselves. In this work, we describe for the first time the manipulation of the molecular transport properties of mesoporous silica thin films by the direct infiltration of polyelectrolytes into the inner environment of the 3D porous framework. The hybrid architectures were built up through the infiltration-electrostatic assembly of polyallylamine (PAH) on the mesopore silica walls, and the resulting systems were studied by a combination of experimental techniques including ellipso-porosimetry, cyclic voltammetry and X-ray photoelectron spectroscopy, among others. Our results show that the infiltration-assembly of PAH alters the intrinsic cation-permselective properties of mesoporous silica films, rendering them ion-permeable mesochannels and enabling the unrestricted diffusion of cationic and anionic species through the hybrid interfacial architecture. Contrary to what happens during the electrostatic assembly of PAH on planar silica films (quantitative charge reversal), the surface charge of the mesoporous walls is completely neutralized upon assembling the cationic PAH layer (i.e., no charge reversal occurs). We consider this work to have profound implications not only on the molecular design of multifunctional mesoporous thin films but also on understanding the predominant role of nanoconfinement effects in dictating the functional properties of polymer-inorganic hybrid nanomaterials. © 2011 American Chemical Society.
author	Williams, Federico Jose Soler Illia, Galo Juan de Avila Arturo
author_facet	Williams, Federico Jose Soler Illia, Galo Juan de Avila Arturo
author_sort	Williams, Federico Jose
title	Manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes
title_short	Manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes
title_full	Manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes
title_fullStr	Manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes
title_full_unstemmed	Manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes
title_sort	manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes
publishDate	2011
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v27_n8_p4328_Brunsen http://hdl.handle.net/20.500.12110/paper_07437463_v27_n8_p4328_Brunsen
work_keys_str_mv	AT williamsfedericojose manipulationofmoleculartransportintomesoporoussilicathinfilmsbytheinfiltrationofpolyelectrolytes AT solerilliagalojuandeavilaarturo manipulationofmoleculartransportintomesoporoussilicathinfilmsbytheinfiltrationofpolyelectrolytes
_version_	1768543376662069248

Manipulation of molecular transport into mesoporous silica thin films by the infiltration of polyelectrolytes

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