Distinct functional elements for outer-surface anti-interference and inner-wall ion gating of nanochannels

Pengcheng Gao, Qun Ma, Defang Ding, Dagui Wang, Xiaoding Lou, Tianyou Zhai and Fan Xia ()
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Pengcheng Gao: China University of Geosciences (CUG)
Qun Ma: China University of Geosciences (CUG)
Defang Ding: China University of Geosciences (CUG)
Dagui Wang: China University of Geosciences (CUG)
Xiaoding Lou: China University of Geosciences (CUG)
Tianyou Zhai: Huazhong University of Science and Technology (HUST)
Fan Xia: China University of Geosciences (CUG)

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract 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 FEOS and FEIW based on accurate regional-modification of OS and IW. The FEIW are served for ionic gating, and the chosen FEOS (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 FEOS performance for blocking interference molecules.

Date: 2018
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DOI: 10.1038/s41467-018-06873-z

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