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Distinct functional elements for outer-surface anti-interference and inner-wall ion gating of nanochannels
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Journal Article
Distinct functional elements for outer-surface anti-interference and inner-wall ion gating of nanochannels
2018
Overview
Over the decades, widespread advances have been achieved on nanochannels, including nanochannel-based DNA sequencing, single-molecule detection, smart sensors, and energy transfer and storage. However, most interest has been focused on the contribution from the functional elements (FEs) at the inner wall (IW) of nanochannels, whereas little attention has been paid to the contribution from the FEs at the nanochannels’ outer surface (OS). Herein, we achieve explicit partition of FE
OS
and FE
IW
based on accurate regional-modification of OS and IW. The FE
IW
are served for ionic gating, and the chosen FE
OS
(hydrophobic or charged) are served for blocking interference molecules into the nanochannels, decreasing the false signals for the ionic gating in complex environments. Furthermore, we define a composite factor, areas of a radar map, to evaluate the FE
OS
performance for blocking interference molecules.
Nanochannels are often modified with functional elements, but most studies have focused on functionalizing only the inner wall. Here, the authors design nanochannels with distinct chemical modifications on the inner and outer surfaces, providing a route to dual-function channels.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
