Institutional Repository of Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (KLCEP)
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 |
ISSN | 0003-2654 |
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 | |
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 |
推荐引用方式 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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