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Dual-response for Hg2+ and Ag+ ions based on biomimetic funnel-shaped alumina nanochannels.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wang, Huimin Hou, Shengnan Wang, Qinqin Wang, Zhiwei Zhai, Jin |
| 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 | PDF HTM / HTML |
| DOI | 10.1039/C4TB01804D |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/tb/c4/c4tb01804d/c4tb01804d1.pdf |
| PubMed reference number | 32262442 |
| Alternate Webpage(s) | https://doi.org/10.1039/C4TB01804D |
| Journal | Medline |
| Volume Number | 3 |
| Issue Number | 8 |
| Journal | Journal of materials chemistry. B |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
