Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes

The control of the morphology, as well as the physical and chemical properties, of nanopores is a key issue for many applications. Reducing pore size is important in nanopore-based sensing applications as it helps to increase sensitivity. Changes of other physical properties such as surface net char...

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Autores: Paoli, Roberto, Engel López, Elisabeth|||0000-0003-4855-8874, Homs-Corbera, A, Samitier Martí, Josep
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/334009
Acceso en línea:https://hdl.handle.net/2117/334009
https://dx.doi.org/10.1039/d0ra05322h
Access Level:acceso abierto
Palabra clave:Nanotechnology
Nanoscience
Bioengineering
Nanopores
Nanotecnologia
Nanociència
Bioenginyeria
Nanoporus
Àrees temàtiques de la UPC::Enginyeria química
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repository_id_str
spelling Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranesPaoli, RobertoEngel López, Elisabeth|||0000-0003-4855-8874Homs-Corbera, ASamitier Martí, JosepNanotechnologyNanoscienceBioengineeringNanoporesNanotecnologiaNanociènciaBioenginyeriaNanoporusÀrees temàtiques de la UPC::Enginyeria químicaThe control of the morphology, as well as the physical and chemical properties, of nanopores is a key issue for many applications. Reducing pore size is important in nanopore-based sensing applications as it helps to increase sensitivity. Changes of other physical properties such as surface net charge can also modify transport selectivity of the pores. We have studied how polyelectrolyte layer-by-layer (LBL) surface modification can be used to change the characteristics of nanoporous membranes. Studies were performed with a custom made three-dimensional multilayer microfluidic device able to fit membrane samples. The device allowed us to efficiently control LBL film deposition over blank low-cost commercially available polycarbonate track-etched (PCTE) membranes. We have demonstrated pore diameter reduction and deposition of the layers inside the pores through confocal and SEM images. Posterior impedance measurement studies served to evaluate experimentally the effect of the LBL deposition on the net inner nanopore surface charge and diameter. Measurements using direct current (DC) and alternative current (AC) voltages have demonstrated contrasted behaviors depending on the number and parity of deposited opposite charge layers. PCTE membranes are originally negatively charged and results evidenced higher impedance increases for paired charge LBL depositions. Impedance decreased when an unpaired positive layer was added. These results showed a different influence on the overall ion motility due to the effect of different surface charges. Results have been fit into a model that suggested a strong dependence of nanopores' impedance module to surface charge on conductive buffers, such as Phosphate Buffer Saline (PBS), even on relatively large nanopores. In AC significant differences between paired and unpaired charged LBL depositions tended to disappear as the total number of layers increased.Peer ReviewedRoyal Society of Chemistry (RSC)20202020-01-0120202020-12-04journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/334009https://dx.doi.org/10.1039/d0ra05322hreponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3340092026-05-27T15:37:01Z
dc.title.none.fl_str_mv Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes
title Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes
spellingShingle Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes
Paoli, Roberto
Nanotechnology
Nanoscience
Bioengineering
Nanopores
Nanotecnologia
Nanociència
Bioenginyeria
Nanoporus
Àrees temàtiques de la UPC::Enginyeria química
title_short Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes
title_full Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes
title_fullStr Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes
title_full_unstemmed Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes
title_sort Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes
dc.creator.none.fl_str_mv Paoli, Roberto
Engel López, Elisabeth|||0000-0003-4855-8874
Homs-Corbera, A
Samitier Martí, Josep
author Paoli, Roberto
author_facet Paoli, Roberto
Engel López, Elisabeth|||0000-0003-4855-8874
Homs-Corbera, A
Samitier Martí, Josep
author_role author
author2 Engel López, Elisabeth|||0000-0003-4855-8874
Homs-Corbera, A
Samitier Martí, Josep
author2_role author
author
author
dc.subject.none.fl_str_mv Nanotechnology
Nanoscience
Bioengineering
Nanopores
Nanotecnologia
Nanociència
Bioenginyeria
Nanoporus
Àrees temàtiques de la UPC::Enginyeria química
topic Nanotechnology
Nanoscience
Bioengineering
Nanopores
Nanotecnologia
Nanociència
Bioenginyeria
Nanoporus
Àrees temàtiques de la UPC::Enginyeria química
description The control of the morphology, as well as the physical and chemical properties, of nanopores is a key issue for many applications. Reducing pore size is important in nanopore-based sensing applications as it helps to increase sensitivity. Changes of other physical properties such as surface net charge can also modify transport selectivity of the pores. We have studied how polyelectrolyte layer-by-layer (LBL) surface modification can be used to change the characteristics of nanoporous membranes. Studies were performed with a custom made three-dimensional multilayer microfluidic device able to fit membrane samples. The device allowed us to efficiently control LBL film deposition over blank low-cost commercially available polycarbonate track-etched (PCTE) membranes. We have demonstrated pore diameter reduction and deposition of the layers inside the pores through confocal and SEM images. Posterior impedance measurement studies served to evaluate experimentally the effect of the LBL deposition on the net inner nanopore surface charge and diameter. Measurements using direct current (DC) and alternative current (AC) voltages have demonstrated contrasted behaviors depending on the number and parity of deposited opposite charge layers. PCTE membranes are originally negatively charged and results evidenced higher impedance increases for paired charge LBL depositions. Impedance decreased when an unpaired positive layer was added. These results showed a different influence on the overall ion motility due to the effect of different surface charges. Results have been fit into a model that suggested a strong dependence of nanopores' impedance module to surface charge on conductive buffers, such as Phosphate Buffer Saline (PBS), even on relatively large nanopores. In AC significant differences between paired and unpaired charged LBL depositions tended to disappear as the total number of layers increased.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-01-01
2020
2020-12-04
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/334009
https://dx.doi.org/10.1039/d0ra05322h
url https://hdl.handle.net/2117/334009
https://dx.doi.org/10.1039/d0ra05322h
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry (RSC)
publisher.none.fl_str_mv Royal Society of Chemistry (RSC)
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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