Blue-to-Red Colorimetric Sensing Strategy for Hg2+ and Ag+ via Redox-Regulated Surface Chemistry of Gold Nanoparticles
Lou, Tingting1,2; Chen, Zhaopeng1; Wang, Yunqing1; Chen, Lingxin1
发表期刊ACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
2011-05-01
卷号3期号:5页码:1568-1573
关键词Gold Nanopartilces Colorimetric Detection "blue-to-red" Strategy Mercury Ion Silver Ion
产权排序[Lou, Tingting; Chen, Zhaopeng; Wang, Yunqing; Chen, Lingxin] Chinese Acad Sci, Key Lab Coastal Environm Proc, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China; [Lou, Tingting] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
通讯作者Chen, LX, Chinese Acad Sci, Key Lab Coastal Environm Proc, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China.lxchen@yic.ac.cn
作者部门环境化学实验室 
英文摘要Here we report a "blue-to-red" colorimetric method for determination of mercury ions (Hg2+) and silver ions (Ag+) based on stabilization of gold nanoparticles (AuNPs) by redox formed metal coating in the presence of ascorbic acid (AA). AuNPs were first stabilized by Tween 20 in phosphate buffer solution with high ionic strength. In a target ion-free system, the addition of N-acetyl-L-cysteine resulted in the aggregation of Tween 20 stabilized AuNPs for mercapto ligand self-assembled on the surface of AuNPs, which induced the AuNPs to be unstable. This would lead to a color change from red to blue. By contrast, in an aqueous solution with Hg2+ or Ag+, the ions could be reduced with the aid of AA to form Hg-Au alloy or Ag coating on the surface of AuNPs. This metal coating blocked mercapto ligand assembly and AuNPs kept monodispersed after addition of N-acetyl-L-cysteine, exhibiting a red color. Therefore, taking advantage of this mechanism, a "blue-to-red" colorimetric sensing strategy could be established for He2+ and Ag+ detection. Compare with the commonly reported aggregation-based method ('red-to-blue'), the color change from blue to red seems more eye-sensitive, especial in low concentration of target. Moreover, selective analysis of Hg2+ and Ag+ was simply achieved by the redox nature of target ions and the application of classic ion masking agents, avoiding the design and selection of ion chelating moieties and complicated gold surface modification procedure. This method could selectively detect Hg2+ and Ag+ as low as 5 nM and 10 nM in pure water with a linear range of 5 x 10(-7) to 1 x 10(-5) M for Hg2+ and 1 x 10(-6) to 8 x 10(-6) M for Ag+, respectively. It was successfully applied to determination of Hg2+ and Ag+ in tap water and drinking water.; Here we report a "blue-to-red" colorimetric method for determination of mercury ions (Hg2+) and silver ions (Ag+) based on stabilization of gold nanoparticles (AuNPs) by redox formed metal coating in the presence of ascorbic acid (AA). AuNPs were first stabilized by Tween 20 in phosphate buffer solution with high ionic strength. In a target ion-free system, the addition of N-acetyl-L-cysteine resulted in the aggregation of Tween 20 stabilized AuNPs for mercapto ligand self-assembled on the surface of AuNPs, which induced the AuNPs to be unstable. This would lead to a color change from red to blue. By contrast, in an aqueous solution with Hg2+ or Ag+, the ions could be reduced with the aid of AA to form Hg-Au alloy or Ag coating on the surface of AuNPs. This metal coating blocked mercapto ligand assembly and AuNPs kept monodispersed after addition of N-acetyl-L-cysteine, exhibiting a red color. Therefore, taking advantage of this mechanism, a "blue-to-red" colorimetric sensing strategy could be established for He2+ and Ag+ detection. Compare with the commonly reported aggregation-based method ('red-to-blue'), the color change from blue to red seems more eye-sensitive, especial in low concentration of target. Moreover, selective analysis of Hg2+ and Ag+ was simply achieved by the redox nature of target ions and the application of classic ion masking agents, avoiding the design and selection of ion chelating moieties and complicated gold surface modification procedure. This method could selectively detect Hg2+ and Ag+ as low as 5 nM and 10 nM in pure water with a linear range of 5 x 10(-7) to 1 x 10(-5) M for Hg2+ and 1 x 10(-6) to 8 x 10(-6) M for Ag+, respectively. It was successfully applied to determination of Hg2+ and Ag+ in tap water and drinking water.
文章类型Article
资助机构Department of Science and Technology of Shandong Province of China [2008GG20005005]; National Natural Science Foundation of China [20975089]; Chinese Academy of Sciences [KZCX2-EW-206]; Department of Science and Technology of Yantai City of China [2010158]
收录类别SCI
语种英语
关键词[WOS]PLASMA-MASS SPECTROMETRY ; CATALYTIC BEACONS ; INORGANIC MERCURY ; AQUEOUS-SOLUTIONS ; BASE-PAIRS ; DNA ; IONS ; APTAMERS ; ACID ; OLIGONUCLEOTIDES
研究领域[WOS]Science & Technology - Other Topics ; Materials Science
WOS记录号WOS:000290843800028
引用统计
被引频次:285[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/133337/4835
专题中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
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 Environm Proc, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Lou, Tingting,Chen, Zhaopeng,Wang, Yunqing,et al. Blue-to-Red Colorimetric Sensing Strategy for Hg2+ and Ag+ via Redox-Regulated Surface Chemistry of Gold Nanoparticles[J]. ACS APPLIED MATERIALS & INTERFACES,2011,3(5):1568-1573.
APA Lou, Tingting,Chen, Zhaopeng,Wang, Yunqing,&Chen, Lingxin.(2011).Blue-to-Red Colorimetric Sensing Strategy for Hg2+ and Ag+ via Redox-Regulated Surface Chemistry of Gold Nanoparticles.ACS APPLIED MATERIALS & INTERFACES,3(5),1568-1573.
MLA Lou, Tingting,et al."Blue-to-Red Colorimetric Sensing Strategy for Hg2+ and Ag+ via Redox-Regulated Surface Chemistry of Gold Nanoparticles".ACS APPLIED MATERIALS & INTERFACES 3.5(2011):1568-1573.
条目包含的文件 下载所有文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Blue-to-Red Colorime(866KB) 开放获取--浏览 下载
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Lou, Tingting]的文章
[Chen, Zhaopeng]的文章
[Wang, Yunqing]的文章
百度学术
百度学术中相似的文章
[Lou, Tingting]的文章
[Chen, Zhaopeng]的文章
[Wang, Yunqing]的文章
必应学术
必应学术中相似的文章
[Lou, Tingting]的文章
[Chen, Zhaopeng]的文章
[Wang, Yunqing]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Blue-to-Red Colorimetric Sensing Strategy for Hg2+ and Ag+ via Redox-Regulated Surface Chemistry of Gold Nanoparticles.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。