Journal
ANALYST
Volume 143, Issue 10, Pages 2342-2348Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8an00097b
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Funding
- National Natural Science Foundation of China [21421004, 21327807]
- Program of Introducing Talents of Discipline to Universities [B16017]
- Innovation Program of Shanghai Municipal Education Commission [2017-01-07-00-02-E00023]
- Fundamental Research Funds for the Central Universities [222201718001, 222201717003]
- China Scholarship Council [2015DFH452]
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In this study, electrochemical reaction mechanism of adenosine monophosphate (AMP) and adenosine triphosphate (ATP) on a silver mesh was investigated in acetate buffer using spectroelectrochemical technique. The results indicate that AMP (or ATP) can form a complex with silver ion originating from a silver mesh when a positive potential was applied. In these complexes, silver ion coordinates with AMP or ATP via their phosphate group. However, when a negative potential was applied, the formed complex disappeared. The complex reaction is therefore an electrochemically reversible process. Further studies using surface-enhancement Raman spectroscopy (SERS) have shown that AMP (or ATP) has a parallel or perpendicular orientation to the silver mesh surface, which is governed by their different binding sites (adenine ring, ribose, and phosphate groups). Herein, the adenine nucleotide-silver mesh surface complexes have displayed a promising biosensing capacity.
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