Ion Gating in Nanopore Electrode Arrays with Hierarchically Organized pH-Responsive Block Copolymer Membranes

Article

Abstract

NEA nanopores. Such selectively transported and confined ions are detected by using a 100 nm gap dual-ring nanoelectrode structure capable of enhancing current output by efficient redox cycling with an amplification factor >102. In addition, BCP@NEAs exhibit extraordinary pH-gated ion selectivity, resulting in a 3380-fold current difference between anion and cation probes at pH 3.0. This hierarchically organized BCP-gated NEA system can serve as a template for the development of other stimulus-responsive ion gates, for example, those based on temperature and ligand gating, thus exploiting the intrinsic advantages of NEAs, such as enhanced sensitivity based on redox cycling, which may lead to technological applications such as engineered biosensors and iontronic devices.

Attributes

Attribute NameValues
Creator
  • Seol Baek

  • Seung-Ryong Kwon

  • Kaiyu Fu

  • Paul Bohn

Journal or Work Title
  • Applied Materials and Interfaces

Volume
  • 12

Issue
  • 49

First Page
  • 55116

Last Page
  • 55124

ISSN
  • 19448252

Publication Date
  • 2020-11

Subject
  • Magellan SEM 2020

Publisher
  • American Chemical Society

Date Created
  • 2021-04-08

Language
  • English

Departments and Units
Record Visibility Public
Content License
  • All rights reserved

Digital Object Identifier

doi:10.1021/acsami.0c12926

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