Ion current rectification properties of non-Newtonian fluids in conical nanochannels
Ionic current rectification generated by the geometric asymmetry of conical nanochannels has gradually attracted attention, but most studies have been limited to Newtonian fluids. In this study, the ionic current rectification characteristics in conical nanochannels filled with non-Newtonian fluids are investigated by numerical simulations. Electroosmotic flow and ion transport in Sisko fluids are solved using the Poisson-Nernst-Planck equations and the Navier-Stokes equations. The effects of the Debye parameter, power-law indexes and applied voltage on the ionic current, axial potential, ion concentration, radial velocity and rectification ratio in the nanopores are investigated. When κRt = 1, the current rectification ratio increases with the increase of the power-law index. However, when κRt = 6, the current rectification ratio first increases and then decreases with the increase of the power law index, reaching the maximum value at n = 1.0. These findings have positive implications for the construction of some nanodevices such as nanofluidic diodes.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:26 |
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| Enthalten in: |
Physical chemistry chemical physics : PCCP - 26(2024), 4 vom: 24. Jan., Seite 2895-2906 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Tang, Lei [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Revised 24.01.2024 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1039/d3cp05184f |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM366614762 |
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| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Ionic current rectification generated by the geometric asymmetry of conical nanochannels has gradually attracted attention, but most studies have been limited to Newtonian fluids. In this study, the ionic current rectification characteristics in conical nanochannels filled with non-Newtonian fluids are investigated by numerical simulations. Electroosmotic flow and ion transport in Sisko fluids are solved using the Poisson-Nernst-Planck equations and the Navier-Stokes equations. The effects of the Debye parameter, power-law indexes and applied voltage on the ionic current, axial potential, ion concentration, radial velocity and rectification ratio in the nanopores are investigated. When κRt = 1, the current rectification ratio increases with the increase of the power-law index. However, when κRt = 6, the current rectification ratio first increases and then decreases with the increase of the power law index, reaching the maximum value at n = 1.0. These findings have positive implications for the construction of some nanodevices such as nanofluidic diodes | ||
| 650 | 4 | |a Journal Article | |
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| 700 | 1 | |a Peng, Li |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Runxin |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Yi |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Jie |e verfasserin |4 aut | |
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