| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Extended Nernst–Planck Equation Incorporating Partial Dehydration Effect |
| Zhong Wang1†, Zhiyang Yuan1‡, and Feng Liu1,2* |
1State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
2Center for Quantitative Biology, Peking University, Beijing 100871, China
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| Cite this article: |
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Zhong Wang, Zhiyang Yuan, and Feng Liu 2020 Chin. Phys. Lett. 37 094701 |
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Abstract Novel ionic transporting phenomena emerge as nanostructures approach the molecular scale. At the sub-2 nm scale, widely used continuum equations, such as the Nernst–Planck equation, break down. Here, we extend the Nernst–Planck equation by adding a partial dehydration effect. Our model agrees with the reported ion fluxes through graphene oxide laminates with sub-2 nm interlayer spacing, outperforming previous models. We also predict that the selectivity sequences of alkali metal ions depend on the geometries of the nanostructures. Our model opens a new avenue for the investigation of the underlying mechanisms in nanofluidics at the sub-2 nm scale.
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Received: 30 April 2020
Published: 01 September 2020
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| Fund: Supported by the National Natural Science Foundation of China (Grant No. 11875076). |
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