Journal
ANALYTICAL CHEMISTRY
Volume 92, Issue 5, Pages 4131-4136Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.0c00131
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Funding
- National Natural Science Foundation of China [21708012]
- Wuhan scientific and technological projects [2019020701011441]
- NSFHP [2017CFB151]
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University [KLSAOFM1809]
- CAS Key Laboratory of Nano-Bio Interface [19NBI01]
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Bioinspired nanochannel based biosensors have been widely applied for sensing ions, small molecules, and biomolecules. However, the low selectivity and difficulty in recycle sensing still heavily hamper their widespread applications. Herein, we designed and fabricated a nanochannel based biosensor for high-efficiency bisulfite (HSO3-) sensing and removal through forming a reversible covalent bond between HSO3- and 4-aminophenyl-phenyl-methanone (APPM). This nanofluidic biosensor displays a promising HSO3- selectivity with high ion rectification/gating ratio (47 and 5) and excellent reversibility and stability. Of note, the L02 cell line containing excess HSO3- could still maintain high vitality in the presence of such an APPM-functionalized biosensor based membrane. These results will not only help to better understand the biological function of HSO(3)(-)in living organisms but also inspire us to develop smart artificial nanochannel based biosensors for biological applications.
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