Nonlinear electrohydrodynamic ion transport in graphene nanopores

Xiaowei Jiang, Chunxiao Zhao, Yechan Noh, Yang Xu, Yuang Chen, Fanfan Chen, Laipeng Ma, Wencai Ren, Narayana R. Aluru, Jiandong Feng

Research output: Contribution to journalArticlepeer-review


Mechanosensitivity is one of the essential functionalities of biological ion channels. Synthesizing an artificial nanofluidic system to mimic such sensations will not only improve our understanding of these fluidic systems but also inspire applications. In contrast to the electrohydrodynamic ion transport in long nanoslits and nanotubes, coupling hydrodynamical and ion transport at the single-atom thickness remains challenging. Here, we report the pressure-modulated ion conduction in graphene nanopores featuring nonlinear electrohydrodynamic coupling. Increase of ionic conductance, ranging from a few percent to 204.5% induced by the pressure—an effect that was not predicted by the classical linear coupling of molecular streaming to voltage-driven ion transport—was observed experimentally. Computational and theoretical studies reveal that the pressure sensitivity of graphene nanopores arises from the transport of capacitively accumulated ions near the graphene surface. Our findings may help understand the electrohydrodynamic ion transport in nanopores and offer a new ion transport controlling methodology.

Original languageEnglish (US)
Article numbereabj2510
JournalScience Advances
Issue number2
StatePublished - Jan 2022
Externally publishedYes

ASJC Scopus subject areas

  • General


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