Label-free colorimetric sensing of copper(II) ions based on accelerating decomposition of H2O2 using gold nanorods as an indicator
Wang, Shasha1,3; Chen, Zhaopeng1; Chen, Ling1,3; Liu, Ruili2; Chen, Lingxin1
发表期刊ANALYST
ISSN0003-2654
2013
卷号138期号:7页码:2080-2084
关键词Cu(Ii)-catalyzed Reaction Nanoparticles Probe Assay Polymer System Lead Oscillations Bistability Dnazyme
产权排序[Wang, Shasha; Chen, Zhaopeng; Chen, Ling; Chen, Lingxin] Chinese Acad Sci, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai Inst Coastal Zone Res YIC,YICCAS, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China; [Liu, Ruili] Yantai Univ, Sch Environm & Mat Engn, Yantai 264005, Peoples R China; [Wang, Shasha; Chen, Ling] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
通讯作者Chen, ZP (reprint author), Chinese Acad Sci, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai Inst Coastal Zone Res YIC,YICCAS, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China. zhpchen@yic.ac.cn ; lxchen@yic.ac.cn
作者部门中科院海岸带环境过程与生态修复重点实验室
英文摘要A novel label-free colorimetric strategy was reported for sensitive detection of copper ions (Cu2+) by using the decelerating etching of gold nanorods (GNRs). H2O2 was employed as the oxidant for corrosion of GNRs, leading to the decrease of the aspect ratio of GNRs. In the absence of Cu2+, the redox corrosion of GNRs by H2O2 occurred rapidly, causing the distinct color change of GNRs from bluish green to purplish red. By virtue of the strong and specific catalysis by Cu2+ of the decomposition of H2O2, the rate of redox corrosion can be decelerated. Relevant experimental parameters, including pH value, concentrations of NaSCN and H2O2, incubation temperature and time were evaluated. Under optimal conditions, our method gave a good linear range of 10-300 nM (R = 0.9985) for Cu2+ and the detection limit with the naked eye is as low as 10 nM. Thus, the proposed colorimetric sensor is simple, sensitive (4.96 nM) and selective, and it has been successfully applied to detect Cu2+ in shellfish samples. Moreover, the potential mechanism was also discussed.; A novel label-free colorimetric strategy was reported for sensitive detection of copper ions (Cu2+) by using the decelerating etching of gold nanorods (GNRs). H2O2 was employed as the oxidant for corrosion of GNRs, leading to the decrease of the aspect ratio of GNRs. In the absence of Cu2+, the redox corrosion of GNRs by H2O2 occurred rapidly, causing the distinct color change of GNRs from bluish green to purplish red. By virtue of the strong and specific catalysis by Cu2+ of the decomposition of H2O2, the rate of redox corrosion can be decelerated. Relevant experimental parameters, including pH value, concentrations of NaSCN and H2O2, incubation temperature and time were evaluated. Under optimal conditions, our method gave a good linear range of 10-300 nM (R = 0.9985) for Cu2+ and the detection limit with the naked eye is as low as 10 nM. Thus, the proposed colorimetric sensor is simple, sensitive (4.96 nM) and selective, and it has been successfully applied to detect Cu2+ in shellfish samples. Moreover, the potential mechanism was also discussed.
文章类型Article
资助机构National Natural Science Foundation of China [21275158]; Innovation Projects of the Chinese Academy of Sciences [KZCX2-EW-206]; Department of Science and Technology of Shandong Province [BS2009DX006]; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry; 100 Talents Program of the Chinese Academy of Sciences
收录类别SCI
语种英语
关键词[WOS]CU(II)-CATALYZED REACTION ; NANOPARTICLES ; PROBE ; ASSAY ; POLYMER ; SYSTEM ; LEAD ; OSCILLATIONS ; BISTABILITY ; DNAZYME
研究领域[WOS]Chemistry
WOS记录号WOS:000315598500024
引用统计
被引频次:71[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/6626
专题中国科学院海岸带环境过程与生态修复重点实验室
作者单位1.Chinese Acad Sci, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai Inst Coastal Zone Res YIC,YICCAS, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China
2.Yantai Univ, Sch Environm & Mat Engn, Yantai 264005, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Wang, Shasha,Chen, Zhaopeng,Chen, Ling,et al. Label-free colorimetric sensing of copper(II) ions based on accelerating decomposition of H2O2 using gold nanorods as an indicator[J]. ANALYST,2013,138(7):2080-2084.
APA Wang, Shasha,Chen, Zhaopeng,Chen, Ling,Liu, Ruili,&Chen, Lingxin.(2013).Label-free colorimetric sensing of copper(II) ions based on accelerating decomposition of H2O2 using gold nanorods as an indicator.ANALYST,138(7),2080-2084.
MLA Wang, Shasha,et al."Label-free colorimetric sensing of copper(II) ions based on accelerating decomposition of H2O2 using gold nanorods as an indicator".ANALYST 138.7(2013):2080-2084.
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