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• W2495451414 abstract "With years of outrageous mercury emissions, there is an urgent need to develop convenient and sensitive methods for detecting mercury ions in response to increasingly serious mercury pollution in water. In the present work, a portable, ultrasensitive SERS sensor is proposed and utilized for detecting trace mercury ions in water. The SERS sensor is prepared on an excellent sliver nanorods array SERS substrate by immobilizing T-component oligonucleotide probes labeled with dye on the 3'-end and -SH on the 5'-end. The SERS sensor responses to the specific chemical bonding between thymine and mercury ions, which causes the previous flexible single strand of oligonucleotide probe changing into rigid and upright double chain structure. Such change in the structure drives the dyes far away from the excellent SERS substrate and results in a SERS signal attenuation of the dye. Therefore, by monitoring the decay of SERS signal of the dye, mercury ions in water can be detected qualitatively and quantitatively. The experimental results indicate that the proposed optimal SERS sensor owns a linear response with wide detecting range from 1pM to 1μM, and a detection limit of 0.16pM is obtained. In addition, the SERS sensor demonstrates good specificity for Hg2+, which can accurately identify trace mercury ions from a mixture of ten kinds of other ions. The SERS sensor has been further executed to analyze the trace mercury ions in tap water and lake water respectively, and good recovery rates are obtained for sensing both kinds of water. With its high selectivity and good portability, the ultrasensitive SERS sensor is expected to be a promising candidate for discriminating mercury ions in the fields of environmental monitoring and food safety." @default.
• W2495451414 created "2016-08-23" @default.
• W2495451414 creator A5000323440 @default.
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• W2495451414 creator A5018432603 @default.
• W2495451414 creator A5038465531 @default.
• W2495451414 creator A5062893409 @default.
• W2495451414 date "2017-01-01" @default.
• W2495451414 modified "2023-09-24" @default.
• W2495451414 title "Ultrasensitive sliver nanorods array SERS sensor for mercury ions" @default.
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• W2495451414 doi "https://doi.org/10.1016/j.bios.2016.07.097" @default.
• W2495451414 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27522013" @default.
• W2495451414 hasPublicationYear "2017" @default.
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