Chemical redox-regulated mesoporous silica-coated gold nanorods for colorimetric probing of Hg(2+) and S(2-)

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Chemical redox-regulated mesoporous silica-coated gold nanorods for colorimetric probing of Hg(2+) and S(2-)
	Wang, Guoqing ; Chen, Zhaopeng ; Wang, Wenhai ; Yan, Bing ; Chen, Lingxin
刊名	ANALYST
	2011
卷号	136 期号:1 页码:174-178
关键词	AQUEOUS-SOLUTIONS OPTICAL-DETECTION DYE DISPLACEMENT NAKED-EYE NANOPARTICLES SULFIDE DNA MERCURY ASSAY POLYMER
ISSN号	0003-2654
通讯作者	Chen, ZPChen, LX, Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, 17 Chunhui Rd, Yantai 264003, Peoples R China. dr.bingyan@gmail.com ; lxchen@yic.ac.cn
中文摘要	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, Hg(2+) 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 S(2-) leads to a reverse process owing to the extraction of Hg(0) by S(2-). The experimental results for colorimetric sensing of Hg(2+) and S(2-) imply considerable sensitivity and specificity, suggesting the high potential of our approach for rapid environmental monitoring and bioanalysis in the future.
学科主题	Chemistry
收录类别	SCI
资助信息	National Natural Science Foundation of China[20975089]; Department of Science and Technology of Shandong Province[2008GG20005005, BS2009DX006]; Department of Science and Technology of Yantai City of China[2007156]; National Basic Research Program of China (973 Program)[2010CB933504]; Chinese Academy of Sciences
语种	英语
公开日期	2011-11-11
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/5099]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室烟台海岸带研究所_近岸生态与环境实验室烟台海岸带研究所_山东省海岸带环境工程技术研究中心
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 Hg(2+) and S(2-)[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 Hg(2+) and S(2-).ANALYST,136(1),174-178.
MLA	Wang, Guoqing,et al."Chemical redox-regulated mesoporous silica-coated gold nanorods for colorimetric probing of Hg(2+) and S(2-)".ANALYST 136.1(2011):174-178.