NDLI: Dual-response for Hg<sup>2+</sup> and Ag<sup>+</sup> ions based on biomimetic funnel-shaped alumina nanochannels

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Back cover

Journal of Materials Chemistry B Vol - 3 Issue - 7

Journal of Materials Chemistry B Vol - 3 Issue - 6

Journal of Materials Chemistry B Vol - 3 Issue - 5

Journal of Materials Chemistry B Vol -2

Journal of Materials Chemistry B Vol -1

Dual-response for Hg²⁺ and Ag⁺ ions based on biomimetic funnel-shaped alumina nanochannels

Content Provider	Royal Society of Chemistry (RSC)
Author	Hou, Shengnan Wang, Huimin Fan, Xia Wang, Qinqin Zhai, Jin Wang, Zhiwei
Copyright Year	2015
Abstract	Biomimetic dual-ion-responsive nanochannels were developed by the principles of metal-ion-mediated base pairs of the responsive T-/C-rich single strand DNA (ssDNA). The responsive ssDNA was immobilized into the funnel-shaped alumina nanochannels, which were fabricated using the anodization technology and pore-widening process. In neutral solution, the conformation of the ssDNA changed from a loosely packed structure into a duplex structure by interacting with Hg2+ or Ag+ ions (T–Hg2+–T or C–Ag+–C complexes). The decreasing ionic currents through the nanochannels were utilized to detect concentrations of Hg2+ or Ag+ ions. The conversion of duplex-quadruplex of Ag+ ions and DNA could be triggered by changing the pH value of aqueous solutions to 4.5, whereas it did not happen in Hg2+ ions solution. Thus, the ssDNA-modified alumina nanochannels selectively responded to Hg2+ and Ag+ ions at pH 4.5 with different ionic transportation properties. The biomimetic dual-ion-responsive nanochannels promised great potential in multiplexed ion sensing.
Starting Page	1699
Ending Page	1705
Page Count	7
File Format	HTM / HTML PDF
ISSN	2050750X
Volume Number	3
Issue Number	8
Journal	Journal of Materials Chemistry B
DOI	10.1039/c4tb01804d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	DNA Aluminium oxide Anodizing PH Biomimetics Multiplexing Ion
Content Type	Text
Resource Type	Article
Subject	Chemistry Medicine Materials Science Biomedical Engineering

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