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Title: Biomimetic potassium-selective nanopores

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [4]
  1. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Istanbul Univ. Cerrahpasa, Avcılar-Istanbul (Turkey). Dept. of Chemistry
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  4. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy, Dept. of Chemistry, Dept. of Biomedical Engineering

Reproducing the exquisite ion selectivity displayed by biological ion channels in artificial nanopore systems has proven to be one of the most challenging tasks undertaken by the nanopore community, yet a successful achievement of this goal offers immense technological potential. Here, we show a strategy to design solid-state nanopores that selectively transport potassium ions and show negligible conductance for sodium ions. The nanopores contain walls decorated with 4'-aminobenzo-18-crown-6 ether and single-stranded DNA (ssDNA) molecules located at one pore entrance. The ionic selectivity stems from facilitated transport of potassium ions in the pore region containing crown ether, while the highly charged ssDNA plays the role of a cation filter. Achieving potassium selectivity in solid-state nanopores opens new avenues toward advanced separation processes, more efficient biosensing technologies, and novel biomimetic nanopore systems.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1513132
Report Number(s):
LLNL-JRNL-760930; 949836
Journal Information:
Science Advances, Vol. 5, Issue 2; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 87 works
Citation information provided by
Web of Science

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Cited By (11)

Self‐Assembled Gold Arrays That Allow Rectification by Nanoscale Selectivity journal November 2019
Ion current rectification: from nanoscale to microscale journal September 2019
Electrokinetic ion transport in an asymmetric double-gated nanochannel with a pH-tunable zwitterionic surface journal January 2019
Controlled Focused Ion Beam Milling of Composite Solid State Nanopore Arrays for Molecule Sensing journal November 2019
Engineering Smart Nanofluidic Systems for Artificial Ion Channels and Ion Pumps: From Single‐Pore to Multichannel Membranes journal December 2019
Rod‐Cell‐Mimetic Photochromic Layered Ion Channels with Multiple Switchable States for Controllable Ion Transport journal September 2019
Application of a bipolar nanopore as a sensor: rectification as an additional device function journal January 2019
A nanofluidic osmotic power generator demonstrated in polymer gel electrolytes with substantially enhanced performance journal January 2019
A pyrophosphate-activated nanochannel inspired by a TRP ion channel journal January 2019
Self‐Assembled Gold Arrays That Allow Rectification by Nanoscale Selectivity journal November 2019
Ionic amplifying circuits inspired by electronics and biology journal March 2020

Figures / Tables (14)


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