DNA derived fluorescent bio-dots for sensitive detection of mercury and silver ions in aqueous solution
Song, T (Song, Ting)1; Zhu, XF (Zhu, Xuefeng)1; Zhou, SH (Zhou, Shenghai)1; Yang, G (Yang, Guang)1; Gan, W (Gan, Wei)1; Yuan, QH (Yuan, Qunhui)1; Zhu, XF
2015
发表期刊APPLIED SURFACE SCIENCE
卷号347期号:8页码:505-513
摘要Inspired by the high affinity between heavy metal ions and bio-molecules as well as the low toxicity of carbon-based quantum dots, we demonstrated the first application of a DNA derived carbonaceous quantum dots, namely bio-dots, in metal ion sensing. The present DNA-derived bio-dots contain graphitic carbon layers with 0.242 nm lattice fringes, exhibit excellent fluorescence property and can be obtained via a facile hydrothermal preparation procedure. Hg(II) and Ag(I) are prone to be captured by the bio-dots due to the existence of residual thymine (T) and cytosine (C) groups, resulting in a quenched fluorescence while other heavy metal ions would cause negligible changes on the fluorescent signals of the bio-dots. The bio-dots could be used as highly selective toxic-free biosensors, with two detecting linear ranges of 0-0.5 mu M and 0.5-6 mu M for Hg(II) and one linear range of 0-10 mu M for Ag(I). The detection limits (at a signal-to-noise ratio of 3) were estimated to be 48 nM for Hg(II) and 0.31 mu M for Ag(I), respectively. The detection of Hg(II) and Ag(I) could also be realized in the real water sample analyses, with satisfying recoveries ranging from 87% to 100%.
关键词Dna Derived Bio-dots Heavy Metal Ion Fluorescent Sensing T-hg-t C-ag-c
DOI10.1016/j.apsusc.2015.04.143
收录类别SCI
WOS记录号WOS:000356058500067
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/4884
专题中国科学院特殊环境功能材料与器件重点试验室
通讯作者Zhu, XF
作者单位1.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ, Xian 710049, Peoples R China
4.Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Peoples R China
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Song, T ,Zhu, XF ,Zhou, SH ,et al. DNA derived fluorescent bio-dots for sensitive detection of mercury and silver ions in aqueous solution[J]. APPLIED SURFACE SCIENCE,2015,347(8):505-513.
APA Song, T .,Zhu, XF .,Zhou, SH .,Yang, G .,Gan, W .,...&Zhu, XF.(2015).DNA derived fluorescent bio-dots for sensitive detection of mercury and silver ions in aqueous solution.APPLIED SURFACE SCIENCE,347(8),505-513.
MLA Song, T ,et al."DNA derived fluorescent bio-dots for sensitive detection of mercury and silver ions in aqueous solution".APPLIED SURFACE SCIENCE 347.8(2015):505-513.
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