Ramirez, Patricio ; Manzanares, José A. ; Cervera, Javier ; Gomez, Vicente ; Ali, Mubarak ; Nasir, Saima ; Ensinger, Wolfgang ; Mafe, Salvador (2019)
Surface charge regulation of functionalized conical nanopore conductance by divalent cations and anions.
In: Electrochimica Acta, 325
doi: 10.1016/j.electacta.2019.134914
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The surface charge regulation in nanoscale volumes is a subject of wide interest to biological and chemical soft matter systems. Also, electrolyte mixtures with monovalent and divalent ions are commonplace in practical applications with micro and nanoporous ion-exchange membranes. We have studied experimentally and theoretically the conductance of conical nanopores functionalized with negative and positive surface charges that are bathed by electrolyte mixtures of the monovalent ions K+ and Cl− and the divalent ions Mg2+, Ba2+, Ca2+, and SO42−. Small concentrations of these ions can modulate the nanopore selectivity and conductance because of their interaction with the charged groups on the pore surface. We have also given a qualitative description of the surface charge regulation using a simplified model for multivalent ion mixtures.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Ramirez, Patricio ; Manzanares, José A. ; Cervera, Javier ; Gomez, Vicente ; Ali, Mubarak ; Nasir, Saima ; Ensinger, Wolfgang ; Mafe, Salvador |
| Art des Eintrags: | Bibliographie |
| Titel: | Surface charge regulation of functionalized conical nanopore conductance by divalent cations and anions |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Dezember 2019 |
| Verlag: | Elsevier Ltd. |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Electrochimica Acta |
| Jahrgang/Volume einer Zeitschrift: | 325 |
| DOI: | 10.1016/j.electacta.2019.134914 |
| URL / URN: | https://doi.org/10.1016/j.electacta.2019.134914 |
| Kurzbeschreibung (Abstract): | The surface charge regulation in nanoscale volumes is a subject of wide interest to biological and chemical soft matter systems. Also, electrolyte mixtures with monovalent and divalent ions are commonplace in practical applications with micro and nanoporous ion-exchange membranes. We have studied experimentally and theoretically the conductance of conical nanopores functionalized with negative and positive surface charges that are bathed by electrolyte mixtures of the monovalent ions K+ and Cl− and the divalent ions Mg2+, Ba2+, Ca2+, and SO42−. Small concentrations of these ions can modulate the nanopore selectivity and conductance because of their interaction with the charged groups on the pore surface. We have also given a qualitative description of the surface charge regulation using a simplified model for multivalent ion mixtures. |
| Freie Schlagworte: | Functionalized conical nanopore, Conductance minima, Surface charge regulation, Divalent ions |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik |
| Hinterlegungsdatum: | 14 Feb 2020 10:21 |
| Letzte Änderung: | 14 Feb 2020 10:21 |
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