Chemical redox-regulated mesoporous silica-coated gold nanorods for colorimetric probing of Hg2+ and S2-

	Chemical redox-regulated mesoporous silica-coated gold nanorods for colorimetric probing of Hg2+ and S2-
	Wang, Guoqing 1; Chen, Zhaopeng1 ; Wang, Wenhai1 ; Yan, Bing 2,3; Chen, Lingxin1
发表期刊	ANALYST
	2011
卷号	136 期号:1 页码:174-178
英文摘要	The past a few years have witnessed the wide use of metallic nanoparticles as ideal reporters for colorimetric detection, which generally involves an analyte-triggered alteration of aggregation degree of applied nanoparticles, and thus the change of colloidal color. However, these aggregation-based colorimetric probe are associated with a number of drawbacks, including poor stability of nanoaggregates, requirement of complicated functionalization and non-linearity of output signals. To address these problems, we herein employ mesoporous silica-coated gold nanorods ( MS AuNRs) as novel nanocomposites for non-aggregation-based label-free colorimetric sensing relying on their chemical redox-modulated surface chemistry. In our sensing system, Hg2+ ions are reduced to Hg-0 depositing on the surface of MS AuNPs and result in a great color change of MS AuNRs, while the subsequent introduction of S2- leads to a reverse process owing to the extraction of Hg-0 by S2-. The experimental results for colorimetric sensing of Hg2+ and S2- imply considerable sensitivity and specificity, suggesting the high potential of our approach for rapid environmental monitoring and bioanalysis in the future.
文章类型	Article
收录类别	SCI
语种	英语
关键词[WOS]	AQUEOUS-SOLUTIONS ; OPTICAL-DETECTION ; DYE DISPLACEMENT ; NAKED-EYE ; NANOPARTICLES ; SULFIDE ; DNA ; MERCURY ; ASSAY ; POLYMER
研究领域[WOS]	Chemistry
WOS记录号	WOS:000285066000022
引用统计	被引频次：85[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/133337/9247
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, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China 2.Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China 3.St Jude Childrens Hosp, Memphis, TN 38105 USA
推荐引用方式 GB/T 7714	Wang, Guoqing,Chen, Zhaopeng,Wang, Wenhai,et al. Chemical redox-regulated mesoporous silica-coated gold nanorods for colorimetric probing of Hg2+ and S2-[J]. ANALYST,2011,136(1):174-178.
APA	Wang, Guoqing,Chen, Zhaopeng,Wang, Wenhai,Yan, Bing,&Chen, Lingxin.(2011).Chemical redox-regulated mesoporous silica-coated gold nanorods for colorimetric probing of Hg2+ and S2-.ANALYST,136(1),174-178.
MLA	Wang, Guoqing,et al."Chemical redox-regulated mesoporous silica-coated gold nanorods for colorimetric probing of Hg2+ and S2-".ANALYST 136.1(2011):174-178.