Silies, Laura ; Andrieu-Brunsen, Annette (2022)
Programming Ionic Pore Accessibility in Zwitterionic Polymer Modified Nanopores.
In: Langmuir, 2018, 34 (3)
doi: 10.26083/tuprints-00021679
Artikel, Zweitveröffentlichung, Postprint
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Kurzbeschreibung (Abstract)
Creating switchable and gradually tunable pores or channels that display transport control similar to biological pores remains a major challenge in nanotechnology. It requires the generation and manipulation of complex charge situations at the nanoscale and the understanding of how confinement influences chemistry and transport. Here, two different pore sizes, ∼100 nm and less than 10 nm, functionalized with varying amounts of responsive zwitterionic polycarboxybetaine methyl acrylate (PCBMA) give fascinating insight into the confinement controlled ionic transport of pores functionalized with pH-dependent zwitterionic polymers. Under basic conditions, the zwitterionic state offers complex, strongly pore-size-dependent ionic permselectivity characteristics. For mesoporous films with pore sizes smaller than 10 nm, complete ion exclusion is observed after reaching a critical zwitterionic polymer amount, clearly indicating an electrostatic behavior of “bipolar charged” pores. This ion exclusion is not observed for pore diameters of ∼100 nm. In addition, the solution pH of equal pore accessibility for oppositely charged ions and pore sizes smaller than 10 nm shifts with increasing polymer amount from a pH of 2.5 to 8.2, and the quantity of ions accessing the pores depends on the pore size. These observations clearly show the potential of controlling pore accessibility based on controlled functional composition at the nanoscale without changing the components themselves as well as the influence of spatial confinement on pore accessibility in the presence of complex (zwitterionic) charged states.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Silies, Laura ; Andrieu-Brunsen, Annette |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Programming Ionic Pore Accessibility in Zwitterionic Polymer Modified Nanopores |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2018 |
| Verlag: | ACS Publications |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Langmuir |
| Jahrgang/Volume einer Zeitschrift: | 34 |
| (Heft-)Nummer: | 3 |
| Kollation: | 25 Seiten |
| DOI: | 10.26083/tuprints-00021679 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/21679 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | Creating switchable and gradually tunable pores or channels that display transport control similar to biological pores remains a major challenge in nanotechnology. It requires the generation and manipulation of complex charge situations at the nanoscale and the understanding of how confinement influences chemistry and transport. Here, two different pore sizes, ∼100 nm and less than 10 nm, functionalized with varying amounts of responsive zwitterionic polycarboxybetaine methyl acrylate (PCBMA) give fascinating insight into the confinement controlled ionic transport of pores functionalized with pH-dependent zwitterionic polymers. Under basic conditions, the zwitterionic state offers complex, strongly pore-size-dependent ionic permselectivity characteristics. For mesoporous films with pore sizes smaller than 10 nm, complete ion exclusion is observed after reaching a critical zwitterionic polymer amount, clearly indicating an electrostatic behavior of “bipolar charged” pores. This ion exclusion is not observed for pore diameters of ∼100 nm. In addition, the solution pH of equal pore accessibility for oppositely charged ions and pore sizes smaller than 10 nm shifts with increasing polymer amount from a pH of 2.5 to 8.2, and the quantity of ions accessing the pores depends on the pore size. These observations clearly show the potential of controlling pore accessibility based on controlled functional composition at the nanoscale without changing the components themselves as well as the influence of spatial confinement on pore accessibility in the presence of complex (zwitterionic) charged states. |
| Status: | Postprint |
| URN: | urn:nbn:de:tuda-tuprints-216795 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | Profilbereiche Profilbereiche > Thermo-Fluids & Interfaces 07 Fachbereich Chemie 07 Fachbereich Chemie > Ernst-Berl-Institut 07 Fachbereich Chemie > Ernst-Berl-Institut > Fachgebiet Makromolekulare Chemie |
| Hinterlegungsdatum: | 20 Jul 2022 12:15 |
| Letzte Änderung: | 03 Jul 2024 02:28 |
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- Programming Ionic Pore Accessibility in Zwitterionic Polymer Modified Nanopores. (deposited 20 Jul 2022 12:15) [Gegenwärtig angezeigt]
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