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2019-07-06

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/148931

Confinement-controlled rectification in a geometric nanofluidic diode

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https://doi.org/10.1063/1.5108723

Resum

Recent experiments with electrolytes driven through conical nanopores give evidence of strong rectified current response. In such devices, the asymmetry in the confinement is responsible for the non-Ohmic response, suggesting that the interplay of entropic and enthalpic forces plays a major role. Here, we propose a theoretical model to shed light on the physical mechanism underlying ionic current rectification. By use of an effective description of the ionic dynamics, we explore the system's response in different electrostatic regimes. We show that the rectification efficiency, as well as the channel selectivity, is driven by the surface-to-bulk conductivity ratio Dukhin length rather than the electrical double layer overlap.

Matèries

Nanofluids, Díodes

Matèries (anglès)

Nanofluids, Diodes

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Articles publicats en revistes (Física de la Matèria Condensada)

Citació

DAL CENGIO, Sara and PAGONABARRAGA MORA, Ignacio. Confinement-controlled rectification in a geometric nanofluidic diode. Journal of Chemical Physics. 2019. Vol. 151, num. 044707. ISSN 0021-9606. [consulted: 27 of June of 2026]. Available at: https://hdl.handle.net/2445/148931

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