TY - JOUR
T1 - Ion Density-Dependent Dynamic Conductance Switching in Biomimetic Graphene Nanopores
AU - Chen, Fanfan
AU - Athreya, Nagendra
AU - Zhao, Chunxiao
AU - Xiong, Mingye
AU - Tan, Haojing
AU - Leburton, Jean Pierre
AU - Feng, Jiandong
N1 - Funding Information:
This work was financially supported by the National Key R&D Program of China (2020YFA0211200), the Natural Science Foundation of Zhejiang Province (LR20B050002), and the National Natural Science Foundation of China (21974123). J.F. acknowledges support from the Hundreds Program of Zhejiang University. N.A., M.X., and J.-P.L. gratefully acknowledge supercomputing resources offered by an Extreme Science and Engineering Discovery Environment (XSEDE) grant (TG-MCB170052) and a Blue Waters grant (BAXI).
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/4/28
Y1 - 2022/4/28
N2 - Gating in ion transport is at the center of many vital living-substance transmission processes, and understanding how gating works at an atomic level is essential but intricate. However, our understanding and finite experimental findings of subcontinuum ion transport in subnanometer nanopores are still limited, which is out of reach of the classical continuum nanofluidics. Moreover, the influence of ion density on subcontinuum ion transport is poorly understood. Here we report the ion density-dependent dynamic conductance switching process in biomimetic graphene nanopores and explain the phenomenon by a reversible ion absorption mechanism. Our molecular dynamics simulations demonstrate that the cations near the graphene nanopore can interact with the surface charges on the nanopore, thereby realizing the switching of high- and low-conductance states. This work has deepened the understanding of gating in ion transport.
AB - Gating in ion transport is at the center of many vital living-substance transmission processes, and understanding how gating works at an atomic level is essential but intricate. However, our understanding and finite experimental findings of subcontinuum ion transport in subnanometer nanopores are still limited, which is out of reach of the classical continuum nanofluidics. Moreover, the influence of ion density on subcontinuum ion transport is poorly understood. Here we report the ion density-dependent dynamic conductance switching process in biomimetic graphene nanopores and explain the phenomenon by a reversible ion absorption mechanism. Our molecular dynamics simulations demonstrate that the cations near the graphene nanopore can interact with the surface charges on the nanopore, thereby realizing the switching of high- and low-conductance states. This work has deepened the understanding of gating in ion transport.
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U2 - 10.1021/acs.jpclett.2c00715
DO - 10.1021/acs.jpclett.2c00715
M3 - Article
C2 - 35426690
AN - SCOPUS:85128603366
SN - 1948-7185
VL - 13
SP - 3602
EP - 3608
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 16
ER -